Honeywell Fan W7752D User Manual

Excel 10  
W7752D,E,F,G,J AND W7754K,L,M,P  
FAN COIL UNIT CONTROLLERS  
LNS PLUG-INS  
HONEYWELL EXCEL 5000 OPEN SYSTEM  
USER GUIDE  
CONTENTS  
Introduction .................................................................................................................................................................................. 1  
Description of Devices ................................................................................................ 1  
Products Covered ....................................................................................................... 2  
Organization of Manual............................................................................................... 2  
Applicable Literature ................................................................................................... 2  
Product Names ........................................................................................................... 2  
Control Application...................................................................................................... 3  
Control Provided ......................................................................................................... 3  
Setpoints.......................................................................................................... 4  
Bypass............................................................................................................. 6  
LED/LCD ......................................................................................................... 6  
Energy-Saving Features.................................................................................. 6  
Occupancy Status............................................................................................ 7  
Safety Features ............................................................................................... 8  
Operating Modes ............................................................................................. 8  
Construction................................................................................................................ 9  
Excel 10 W7752 FCU Controllers.................................................................... 9  
Excel 10 W7754 FCU Controllers.................................................................... 9  
Controller Performance Specifications........................................................... 11  
Configurations........................................................................................................... 12  
General.......................................................................................................... 12  
Fan Type ....................................................................................................... 12  
Type of Heating and Cooling Equipment ....................................................... 13  
Reheat Output ............................................................................................... 14  
Digital Input.................................................................................................... 14  
Excel 10 Wall Module Options....................................................................... 15  
Abbreviations and Definitions.................................................................................... 16  
Application Steps ....................................................................................................................................................................... 17  
Overview................................................................................................................... 17  
Step 1. Plan the System............................................................................................ 17  
Step 2. Determine Other Bus Devices Required....................................................... 17  
Step 3. Lay Out Communications and Power Wiring ................................................ 18  
LONWORKS Layout ......................................................................................... 18  
Power Wiring ................................................................................................. 19  
Step 4. Prepare Wiring Diagrams ............................................................................. 19  
General Considerations................................................................................. 19  
Terminal Block Assignment and Wiring Example for the W7752 Controller... 21  
Terminal Block Assignment and Wiring Example for the W7754 Controller... 22  
LONWORKS Termination ................................................................................. 23  
Step 5. Order Equipment .......................................................................................... 24  
Step 6. Configure Controllers.................................................................................... 25  
General.......................................................................................................... 25  
Output............................................................................................................ 26  
Input............................................................................................................... 27  
Equipment Control......................................................................................... 28  
Fan ................................................................................................................ 28  
Switching Levels............................................................................................ 29  
Zone Options................................................................................................. 29  
Miscellaneous................................................................................................ 29  
® U.S. Registered Trademark  
Copyright © 2009 Honeywell Inc.  
All Rights Reserved  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
INTRODUCTION  
Description of Devices  
The W7752D,E,F,G, and J Controllers and W7754K,L,M,N,  
and P Controllers are Fan Coil Unit Controllers belonging to  
the Excel 10 product line. Excel 10 FCU Controller systems  
control the space temperature in a given room by regulating  
the heating and/or cooling equipment which control the tem-  
perature of the air delivered to that space and the fan which  
controls air flow. Reheat coils are often included at the fan coil  
unit. Excel 10 FCU Controllers are capable of stand-alone  
operation; however, optimum functional benefits are achieved  
when the network communication capabilities are used.  
The wall modules are available in a variety of models  
incorporating various combinatinos of the following options:  
Setpoint adjustment  
Bypass pushbutton and LED  
Fan Switching  
See Table 7 on page 12 for a complete list of wall  
modules options  
Excel 10 FCU Controllers connect to a LonWorks network and  
interoperate with 3rd-party nodes.  
A family of direct wired wall modules with a temperature  
sensor for space temperature measurement, setpoint adjust-  
ment, bypass push-button, status LED, and LCD display can  
be used in conjunction with Excel 10 FCU Controllers.  
Excel 5000  
LonWorks network  
PCLTA20  
PCC10  
Honeywell  
Excel 10 W7752  
FCU Controller  
Honeywell  
Excel 10 W7754  
FCU Controller  
Excel 10  
wall module  
Excel 10  
wall module  
Fig. 1. Typical system overview  
1
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Products Covered  
Product Names  
This System Engineering Guide describes how to apply the  
Excel 10 FCU Controllers and the accessories to typical FCU  
applications. The specific devices covered include:  
W7752D,E,F,G, and J FCU Controllers.  
W7754K,L,M,N, and P FCU Controllers.  
T7460 Wall Modules.  
The W7752 Controller is available in five models:  
W7752D FCU Controller with 230 Vac power supply and  
with relay suitable for reheat applications.  
W7752E FCU Controller with 230 Vac power supply  
without reheat relay.  
W7752F FCU Controller with 115 Vac power supply with  
reheat relay suitable for reheat applications.  
W7752G FCU Controller with 115 Vac power supply  
without reheat relay.  
T7560 Wall Modules.  
Organization of Manual  
W7752J FCU Controller with 100 Vac power supply  
without reheat relay.  
The Introduction and Application Steps 1 through 5 provide  
the information needed to make accurate ordering decisions.  
Application Step 6 and the Appendices include configuration  
engineering that can be started using a LNS tool after the  
devices and accessories are ordered. Application Step 7 is  
troubleshooting. Information provided in support of the use of  
third-party LonWorks communication packages to configure  
FCU Controllers is found in the Appendices.  
The W7754 Controller is available in five models:  
W7754K FCU Controller with 230 Vac power supply, one  
triac output, and one digital output suitable for attachment  
to a solid-state relay employed for low-voltage Pulse-  
Width Modulated (PWM) control in high-current electric  
reheat applications.  
W7754L FCU Controller with 24 Vac power supply and  
two triac outputs.  
The organization of the manual assumes a project is being  
engineered from start to finish. If you are adding to, or  
changing an existing system, the Table of Contents can guide  
you to the relevant information.  
W7754M FCU Controller with 230 Vac power supply.  
W7754N FCU Controller with 230 Vac power supply and  
two triac outputs.  
W7754P FCU Controller with 230 Vac power supply, four  
triac outputs, and an extra, fourth relay suitable for reheat  
applications.  
Applicable Literature  
The following is a list of documents that contains information  
related to the Excel 10 FCU Controller. Form No.  
Title  
The FCU Controllers can use any of the following Excel 10  
wall modules:  
T7460A with temperature sensor.  
T7460B with temperature sensor and setpoint adjustment.  
T7460C with temperature sensor, setpoint adjustment, and  
bypass button and LED.  
EN0B-0376GE51  
EN0B-0453GE51  
EN1B-0250GE51  
EN1B-0251GE51  
EN2B-0285GE51  
74-3083  
Excel 10 W7752D,E,F,G,J FCU  
Controller Specification Data  
Excel 10 W7754K,L,M,N,P FCU  
Controller Specification Data  
Excel 10 W7752D,E,F,G,J FCU  
Controller Installation Instructions  
Excel 10 W7754K,L,M,N,P FCU  
Controller Installation Instructions  
Excel 10 FCU Controller LNS Plug-Ins  
User Guide  
T7460D with temperature sensor, setpoint adjustment and  
5-position fan switch.  
T7460E with temperature sensor, setpoint adjustment,  
bypass button and LED, and 3-position fan switch.  
T7460F with temperature sensor, setpoint adjustment,  
bypass button and LED, and 5-position fan switch.  
T7560A with temperature sensor, unit enable button,  
setpoint adjustment, bypass button, LCD display and  
configurable fan override with up to five settings.  
Excel 10 T7460 Wall Modules  
Specification Data  
95-7610  
Excel 10 T7460 Wall Modules  
Installation Instructions  
Other products:  
C7608A Return Air Sensor  
Refer to the Table 15 (see Application Steps, Step 5. Order  
Equipment) for complete listing of all available part numbers.  
EN0B-0237GE51  
EN1B-0146GE51  
95-7554  
Excel 10 T7560 Wall Modules  
Specification Data  
Excel 10 T7560 Wall Modules  
Installation Instructions  
Excel 10 FTT/LPT 209541B Termination  
Module Installation Instructions  
EN2B-0285GE51 R0909  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Control Application  
Fan coil unit systems in commercial buildings control room  
temperature through the control of heat and/or cold water  
valves and fan speed. Electric reheat coils may also be used  
in the system. The Excel 10 FCU Controller is located in the  
FCU and is typically connected to an Excel 10 wall module  
which incorporates a temperature sensor, setpoint and fan  
speed controls, and a bypass or override button. Fig. 2 shows  
a typical FCU ontrol application.  
window  
contact  
e.g. Excel 10 W7754  
FCU Controller  
Honeywell  
D-71101 Schönaich  
Made in Germany  
Excel 10  
wall module  
LonWorks network  
Fig. 2. Typical Fan Coil Unit control application  
Control Provided  
Excel 10 FCU Controllers provide room temperature control  
for two- and four-pipe fan coil units with optional electric  
heating coil. The basic control sequence is shown in Fig. 3.  
As space temperature falls below the heating setpoint, the  
heating output is increased. As space temperature  
increases above the cooling setpoint, the cooling output is  
modulated to 100%. Switching levels for staged  
heating/cooling and fan speeds are configurable. The fan  
may still be configured to run continuously during the zero  
energy band in the "occupied" mode. Additional  
Excel 10 FCU Controllers use a PID control algorithm in  
which each of the three parameters can be configured.  
There are additional configurable boost parameters ("PID  
Boost:" "Cooling" and "Heating") which specify a range  
outside of which the heating or cooling outputs are turned  
ON fully for faster response (in the case of thermal  
actuators, this specifies the control hysteresis). The  
controllers are delivered with factory defaults for each of the  
parameters.  
configurable fan control features include fan minimum  
ON/OFF times, run-up, and overrun-times.  
3
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Fig. 3. Control sequence diagram  
Setpoints  
When the Excel 10 FCU Controller is in the "unoccupied"  
mode, the remote setpoint knob is ignored, and the con-  
figured setpoints for this mode are used instead.  
Setpoint Knob  
The Excel 10 FCU Controllers may be hardwired to an Excel  
10 wall module equipped with a setpoint knob. When the  
Excel 10 FCU Controller has been configured (using the LNS  
plug-in tool) to read input from the wall module's setpoint  
knob, the value from the setpoint knob is used to calculate the  
"occupied" setpoint for the heating and the cooling modes.  
There are two configurations which determine how the  
setpoint used by the control algorithm is calculated: "relative"  
(or "offset") and "absolute middle". When configured for  
"relative", the Excel 10 wall module setpoint knob represents  
a number from -9...+9 DDF(-5...+5 K) which is added to the  
configured "occupied" and "standby" setpoints for the heating  
and the cooling modes. When configured to "absolute  
middle", the setpoint knob becomes the mid-point of the Zero  
Energy Band (ZEB) extending between the "occupied" or  
"standby" setpoints for the heating and the cooling modes.  
The range of the ZEB is found by taking the difference  
between the "occupied" or "standby" setpoints configured for  
the heating and the cooling modes; in the case of "absolute  
middle", the current "occupied" and "standby" setpoints are  
therefore found as follows:  
Setpoint Limits  
Setpoints are limited to the range of 50...95°F (10...35°C).  
The value of the setpoint knob is limited to the range provided  
by the configuration parameters Maximum Limit Setpoint pot  
and Minimum Limit Setpoint pot. In the case of absolute  
"occupied" and "standby" setpoints, the setpoint knob still  
represents the mid-point of the ZEB, even when set to either  
of these limits. The actual setpoints are given by the  
equations shown above. When the setpoint knob is configured  
to be "relative", the lowest actual "occupied" setpoint allowed  
is equal to SptHeatOcc - SptKnobLowLim, and the highest  
allowed is equal to SptCoolOcc + SptKnobHiLim. The lowest  
and highest "standby" setpoints are found in an analogous  
fashion.  
Setpoint from Network  
When the Excel 10 FCU Controller is not configured to be  
hardwired to a wall module, nviSetPoint must be bound to  
another node that provides a setpoint. When bound and when  
a valid update is received, nviSetPoint is used with the  
appropriate ZEB:  
When the Excel 10 FCU Controller is in the "occupied" mode:  
nvoActiveSetPt (in cooling mode) =  
nvoSensor.remote_set_point + (Cooling Occupied  
Setpoint - Heating Occupied Setpoint) / 2  
nvoActiveSetPt (in heating mode) =  
ZEBoccupied = Cooling Occupied Septoint - Heating  
Occupied Setpoint  
ZEBstandby = Cooling Standby Setpoint - Heating  
Standby Setpoint  
nvoSensor.remote_set_point - (Cooling Occupied  
Setpoint - Heating Occupied Setpoint) / 2  
for Standby:  
nvoActiveSetPt (in cooling mode) =  
The "unoccupied" setpoint does not depend on nviSetPoint at  
all.  
nvoSensor.remote_set_point + (Cooling Standby  
Setpoint - Heating Standby Setpoint) / 2  
nvoActiveSetPt (in heating mode) =  
Setpoint Offset  
nvoSensor.remote_set_point - (Cooling Standby  
Setpoint - Heating Standby Setpoint) / 2  
Third-party nodes may be bound to nviSetPtOffset to shift the  
setpoint in the range of -18 to 18 DDF (-10 K to 10 K).  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table 1. Example setpoint values based upon default configuration – "absolute middle" setpoint knob (°C)  
occupancy  
mode  
configured  
cooling setpoint heating setpoint  
configured  
setpoint  
knob1  
effective cooling  
setpoint2,3  
effective heating  
setpoint2,4  
ZEB  
"occupied"  
"standby"  
23  
25  
28  
21  
19  
16  
2
6
21  
21  
X
22  
24  
28  
20  
18  
16  
"unoccupied"  
12  
NOTES:  
1. Sample value shown. Limited by default configuration settings to the range of 12...30°C.  
2. Limited to the range of 10...35°C.  
3. = setpoint knob + (ZEB/2)  
4. = setpoint knob – (ZEB/2)  
Table 2. Example setpoint values based upon default configuration - Relative setpoint knob (°C)  
occupancy  
mode  
configured  
cooling setpoint heating setpoint  
configured  
setpoint  
knob1  
effective cooling  
setpoint2,3  
effective heating  
setpoint2,4  
ZEB  
"occupied"  
"standby"  
23  
25  
28  
21  
19  
16  
2
6
-2  
-2  
X
21  
23  
28  
19  
17  
16  
"unoccupied"  
12  
NOTES:  
1. Sample value shown. Limited by default configuration settings to the range of -5...+5°C.  
2. Limited to the range of 10...35°C.  
3. = configured cooling setpoint + setpoint knob  
4. = configured heating setpoint + setpoint knob  
5
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
determined by nviManOccCmd (provided it has not been  
set to OC_NUL).  
Bypass  
Bypass Mode  
When the Excel 10 FCU Controller is in the "unoccupied"  
LED/LCD  
LED Override  
mode, the Excel 10 wall module's bypass push-button may be  
used to force the Excel 10 FCU Controller into the "occupied"  
mode. The Excel 10 FCU Controller can also be forced into  
the "occupied" mode by means of a LONWORKS network  
command (when nviManOccCmd is set to OC_BYPASS). The  
controller will then remain in "bypass" mode until:  
The wall module’s LED indicates that the FCU Controller is  
being overridden by either the bypass button or the  
LONWORKS network.  
LED ON "override bypass"  
One flash per second "override unoccupied"  
Two flashes per second "override standby" or  
"occupied"  
1. The bypass timer has timed out, or  
2. The user again presses the Excel 10 wall module's  
bypass push-button, thus cancelling the "bypass" mode,  
or  
3. The occupancy schedule (nviTodEvent) switches the  
mode to "occupied".  
LED OFF no override  
Four flashes per second The controller is responding to  
a LONWORKS network management wink command.  
4. nviManOccCmd is set to OC_NUL.  
LED Occupancy  
The wall module’s LED indicates the effective occupancy  
mode.  
The Excel 10 wall module indicates the current bypass mode  
status (see Excel 10 wall module literature for further  
information).  
LED ON effective "occupied" or effective "bypass"  
One flash per second effective "standby"  
LED OFF effective "unoccupied"  
Four flashes per second The controller is responding to  
a LONWORKS network management wink command.  
Bypass Timer  
When the "bypass" mode has been activated, the bypass  
timer is set to BypTime (default of 180 minutes), at the end of  
which the mode will revert to its original state (see Excel 10  
wall module literature for further information).  
LCD Display  
This mode is used only for T7560 Wall Modules. The  
occupancy mode is represented by the following symbols:  
Continuous "Unoccupied" Mode  
effective "occupied" or effective "bypass"  
effective "standby"  
The continuous "unoccupied" mode is entered when an Excel  
10 wall module is configured to allow it and if:  
(in the case of the T7460) the bypass button is pressed for  
effective "unoccupied"  
Controller is OFF  
four to seven seconds (until the LED blinks),  
(in the case of the T7560) the bypass button is pressed for  
more than five seconds (until the flashing moon appears).  
The Excel 10 FCU Controller can also be forced into the con-  
tinuous "unoccupied" mode by means of a LONWORKS net-  
work command (when nviManOccCmd is set to  
OC_UNOCCUPIED). The Excel 10 FCU Controller will then  
remain in this mode indefinitely, or until the bypass button is  
pressed to exit the mode or a network command is sent to  
clear the mode.  
and  
Controller is OFF, frost protection is enabled.  
Flashing symbols indicate the "override" mode:  
override "occupied" or override "bypass"  
override "standby"  
override "unoccupied"  
The controller is responding to a LONWORKS network  
management wink command.  
Bypass Push-Button  
Excel 10 FCU Controllers may be hardwired to an Excel 10  
wall module equipped with a bypass push-button. The bypass  
push-button has three possible configurations (see Table 17  
for further information):  
Energy-Saving Features  
The "Standby" Mode  
The digital input for reading input from an occupancy sensor  
(usually a motion detector) provides the Excel 10 FCU Con-  
troller with a means to enter an energy-saving standby mode  
whenever there are no people in the room. The "standby"  
mode occurs when the scheduled occupancy mode is  
"occupied" but the occupancy sensor indicates that the room  
is nevertheless currently unoccupied. If no occupancy sensor  
is directly connected to the Excel 10 FCU Controller, an  
occupancy sensor from another node may be bound to the  
network input nviSensorOCC. The Excel 10 FCU Controller  
can also be forced into the "standby" mode by means of a  
LONWORKS network command (when nviManOccCmd is set to  
OC_STANDBY). When in the "standby" mode, the Excel 10  
FCU Controller uses the "standby" setpoints configured for  
the heating and the cooling modes.  
NONE  
BYPASS_UNOCCUPIED  
BYPASS_ONLY  
Override Priority  
Excel 10 FCU Controllers can be configured to arbitrate  
overrides coming from the bypass push-button and the  
network. There are two possible configurations, having the  
following meanings:  
LAST_WINS specifies that the last command received  
from either the wall module or nviManOccCmd  
determines the effective override state.  
NETWORK_WINS specifies that, regardless of the wall  
module override state, the effective occupancy mode is  
EN2B-0285GE51 R0909  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Window Sensor  
Optimum Start Gradients  
The digital input for reading input from a window contact  
There are two parameters, Cool Rec Ramp and Heat Rec  
provides the Excel 10 FCU Controller with a means to disable  
its temperature control activities if someone has opened a  
window or door in the room. If no window sensor is directly  
connected to the Excel 10 FCU Controller, the sensor from  
another node may be used by binding it to nviWindow. Frost  
protection remains active. Normal temperature control  
resumes when the window closes.  
Ramp, which can be configured to cause the cooling and  
heating setpoints respectively to ramp up to their occupied  
settings from their unoccupied or standby settings prior to  
scheduled occupancy. The Excel 10 FCU Controller uses the  
configured rates to determine the optimum time to start  
increasing the heating or cooling demand. See the following  
figures. The configuration parameters are in K/hour.  
Demand Limit Control  
When a high-electrical-demand signal is received from an  
energy management system via the LONWORKS network  
(nviDlcShed), the Excel 10 FCU Controller uses Demand  
Limit Control Bump to shift the current setpoint (down for  
heating and up for cooling) by the configured value to save  
energy.  
Fig. 5. Optimum start - cooling  
Fig. 4. Optimum start - heating  
Occupancy Status  
The occupancy status is determined based upon the following table. Manual override may come from nviManOccCmd or from  
the bypass push-button.  
Table 3. Effective occupancy mode arbitration  
scheduled occupancy mode  
occupancy sensor status  
manual override status  
not assigned  
not assigned  
"occupied"  
effective operating mode  
OC_OCCUPIED  
OC_STANDBY  
"occupied"  
"occupied"  
X
room occupied  
room not occupied  
X
X
X
X
X
X
X
X
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_STANDBY  
X
"unoccupied"  
"standby"  
X
"occupied"  
"standby"  
"standby"  
"unoccupied"  
"unoccupied"  
X=Don't care  
"standby"  
OC_OCCUPIED  
OC_STANDBY  
not assigned  
"standby"  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
not assigned  
"standby"  
7
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Safety Features  
Frost Protection  
Fan Failure Protection  
If the room temperature falls below 46.4 °F (8 °C), the Excel  
10 FCU Controller enables the heating circuit to ensure frost  
protection and an alarm is issued. When the temperature  
rises above 48.2 °F (9 °C) again, the heating circuit is turned  
OFF again.  
When configured with an airflow detector, the Excel 10 FCU  
Controller protects equipment by switching OFF heating /  
cooling outputs and issuing an alarm when the fan fails.  
Fan Interlocks  
The Excel 10 FCU Controller can be configured such that  
heating and/or cooling outputs are never ON unless the fan is  
running. A fan run-up time can be configured to turn ON the  
fan prior to the heating/cooling outputs being switched ON,  
and a fan overrun time can be configured to keep the fan  
running for a period of time after the heating/cooling outputs  
are switched OFF.  
Smoke Control  
The Excel 10 FCU Controller will respond to LONWORKS  
network emergency commands by switching OFF  
heating/cooling outputs and switching OFF the fan  
(depressurize) or switching ON the fan at its highest speed  
(pressurize). An alarm is issued for any emergency  
commands  
Operating Modes  
The possible modes of operation are listed in Table 4.  
Table 4. Modes of operation for Excel 10 FCU Controller  
mode  
description  
events causing a transition to this mode  
operational modes (NV reference)  
START-UP AND  
WAIT  
Control algorithms are disabled. Outputs stay in  
their initial positions. Physical inputs are periodically  
read and digital filtering of analog inputs is turned  
OFF to speed up settling time. Input NVs are  
received and output NVs are sent periodically.  
This is the first mode after an application restart.  
FLOATING  
The Excel 10 FCU Controller drives the floating  
When the effective occupancy changes to  
"unoccupied" or "standby", after start-up, after 24  
hours since the last positioning, or after each  
positioning to 0%, the Excel 10 FCU Controller  
transitions to this mode.  
OUTPUTS SYNCH control valves to their initial positions and then  
transitions to one of the control modes.  
COOLING  
The Excel 10 FCU Controller is controlling in the  
cooling mode.  
Network input nviApplicMode has a value of  
HVAC_COOL or HVAC_AUTO and the space  
temperature is above the cooling setpoint.  
HEATING  
The Excel 10 FCU Controller is controlling in the  
heating mode.  
Network input nviApplicMode has the value of  
HVAC_HEAT or HVAC_AUTO and the space  
temperature is below the heating setpoint.  
MANUAL MODE  
The control algorithms stay active and outputs are  
controlled automatically until set individually to test MODE_MANUAL.  
positions using the input NV nviTest.  
Network input nviManualMode has value of  
FACTORY TEST  
DISABLED  
Control algorithm is disabled; a special factory test This mode is for factory testing, only.  
program runs.  
Control algorithms are terminated, outputs are  
Network input nviManualMode has a value of  
turned OFF (turn-OFF sequences and interlocks are MODE_DISABLED.  
active). Frost protection is disabled.  
PRESSURIZE  
Heating/cooling outputs are switched OFF, and the Network input nviEmerg containing smoke control  
fan is switched ON at its highest speed.  
signal from the LONWORKS network has the value  
of EMERG_PRESSURIZE.  
DEPRESSURIZE  
Heating, cooling, and fan outputs are switched OFF. Network input nviEmerg containing smoke control  
signal from the LONWORKS network has the value  
of EMERG_DEPRESSURIZE.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Construction  
Excel 10 W7752 FCU Controllers  
Excel 10 W7754 FCU Controllers  
The Excel 10 W7752 FCU Controller is available in five basic  
models, each with two different possibilities for LONWORKS  
transceivers. All of these controllers are mains-powered, and  
two models are equipped with an additional high-power relay  
for applications with electric reheat. Table 5 shows the  
differences between models.  
The Excel 10 W7754 FCU Controller is available in five basic  
models, each with two different possibilities for LONWORKS  
transceivers. Table 6 shows the differences between models.  
Table 6. Excel 10 W7754 FCU Controller models  
OS number  
W7754K1001  
W7754L1009  
W7754M1007  
W7754N1004  
W7754P1000  
power input  
230 Vac  
24 Vac  
reheat relay  
Table 5. Excel 10 W7752 FCU Controller models  
OS number  
W7752D2007  
W7752E2004  
W7752F2002  
W7752G2000  
W7752J2003  
power input  
230 Vac  
230 Vac  
115 Vac  
115 Vac  
100 Vac  
reheat relay  
X
230 Vac  
230 Vac  
230 Vac  
X
X
All wiring connections to the controllers are made at screw  
terminal blocks accessible beneath a plastic safety cover.  
Mounting dimensions are shown in Fig. 7 on page 10.  
All wiring connections to the controllers are made at screw  
terminal blocks accessible beneath a plastic safety cover.  
Mounting dimensions are shown in Fig. 6 on page 10.  
CAUTION  
If Excel 10 FCU Controllers are mounted vertically and  
thermal actuators are used, the transformer must not  
be located below the electronics due to heating  
effects.  
WARNING  
Electrical Shock Hazard.  
Mains power at terminal block can cause personal  
injury or death. Excel 10 FCU Controllers must be  
mounted inside their fan coil unit boxes to prevent  
access by unauthorized personnel.  
To reduce the risk of fire or electric shock, install in a  
controlled environment relatively free of contaminants.  
9
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Fig. 6. W7752 dimensions, in inches (mm)  
180  
59.5  
UNUSED ON UNUSED  
W7754Kxxxx  
230 Vac, 50/60 Hz  
max. 5 VA unloaded  
Honeywell  
D-71101 Schönaich  
Made in Germany  
WALL MOD.  
DI2  
USED  
0345  
USED  
110  
90  
130  
triac  
10A  
2 A  
0.5 A  
8
9
10 11 12  
+ -  
1
2
3
4
5
6
7
131415161718 192021222324 2526  
2A/M  
III II  
I
N
L
230 V  
L
N
5 3 4 2  
1
OUT1 OUT2  
230 Vac  
LON  
230 V  
T7460 / T7560  
terminal protection  
cover (optional)  
Fig. 7. W7754 dimensions, in mm  
EN2B-0285GE51 R0909  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Hardware  
Output  
Controller Performance Specifications  
Power:  
Fan Coil Unit Controller  
Object #8020  
W7752D and W7752E; W7754K,M,N,P  
230 Vac +10%, -15%, 50/60 Hz.  
W7752F and W7752G  
115 Vac +10%, -15%, 50/60 Hz.  
W7752J  
100 Vac ±6%, 50/60 Hz.  
W7754L  
nvoHeatOutput  
SNVT_lev_percent  
nviSpaceTemp  
SNVT_temp_p  
nv3  
nv4  
nv5  
nv1  
nv2  
Mandatory  
Network  
Variables  
nvoCoolOutput  
SNVT_lev_percent  
nviSetPoint  
SNVT_temp_p  
24 Vac ±20%, 50/60 Hz.  
nvoFanSpeed  
SNVT_switch  
Operating Temperature:  
32...122°F (0...50°C).  
nvoTerminalLoad  
SNVT_lev_percent  
nviFanSpeedCmd  
SNVT_switch  
nv11  
nv12  
nv13  
nv14  
nv6  
nv7  
nv8  
Shipping/Storage Temperature:  
-40...+158°F (-40...+70°C).  
nvoLoadAbs  
SNVT_power  
nviOccCmd  
SNVT_occupancy  
Relative Humidity:  
Optional  
Network  
Variables  
nvoDischAirTemp  
SNVT_temp_p  
5% to 95% non-condensing  
nviApplicMode  
SNVT_hvac_mode  
Inputs:  
nvoReheat  
SNVT_switch  
nviSetPtOffset  
SNVT_temp_p  
Temperature Sensor:  
20k ohm NTC  
nv9  
nvoSpaceTemp  
SNVT_temp_p  
nv15  
nviWaterTemp  
SNVT_temp_p  
Setpoint Potentiometer:  
10k ohm  
nv10  
nv17  
nv18  
nvoEffectSetPt  
SNVT_temp_p  
nv16  
nv19  
nviDischAirTemp  
SNVT_temp_p  
Digital Input:  
nvoEffectOcc  
SNVT_occupancy  
Closed 400 ohms  
Open 10 K ohms  
nviEnergyHoldOff  
SNVT_switch  
nvoEnergyHoldOff  
SNVT_switch  
nv20  
nv21  
Outputs:  
Triac voltage range:  
24 Vac ± 20%.  
nvoUnitStatus  
SNVT_hvac_status  
Triac max. current ratings:  
250 mA continuous  
650 mA surge for 30 sec.  
Configuration Properties  
nc49 - nciSndHrtBt  
nc52 - nciMinOutTm SNVT_time_sec  
nc48 - nciRcvHrtBt  
nc17 - nciLocation  
nc60 - nciSetPnts  
nc59 - nciNumValve  
SNVT_time_sec  
mandatory  
optional  
optional  
optional  
IMPORTANT:  
SNVT_time_sec  
SNVT_str_asc  
SNVT_temp_setpt mandatory  
When any device is energized by a triac, the device  
must be able to sink a minimum of 15 mA. If non-  
Honeywell motors, actuators, or transducers are to  
be used with Excel 10 FCU Controllers, compatibility  
must be verified.  
SNVT_count  
optional  
Manufacturer  
Defined  
nviSensorOcc  
SNVT_Occupancy  
nvoSensorOcc  
SNVT_occupancy  
Section  
Fan relays voltage range:  
20 to 253 Vac  
nviEmerg  
SNVT_hvac_emerg  
nvoDigitInState  
SNVT_switch  
Fan relays max. current rating:  
3 A  
nviReheatRelay  
SNVT_switch  
Electric reheat relay voltage range:  
20 to 253 Vac  
Electric reheat relay max. current rating:  
10 A  
6 A (UL916)  
Hardware  
Input  
NOT SUPPORTED.  
Interoperability  
The Excel 10 FCU Controllers use the LonTalk protocol. They  
support the LONMARK Functional Profile # 8020 “Fan Coil Unit  
Controller”, version 2.0. Fig. 8 shows the implementation  
used.  
Fig. 8. LONMARK FCU object profile  
11  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Configurations  
General  
Fan Type  
The following sections provide an overview of the Excel 10  
FCU Controller options related to inputs and outputs. See  
Application Step 6. Plug-Ins Configuration Screens for  
complete list of configuration options and defaults.  
Each fan coil unit controlled by an Excel 10 FCU Controller  
can have a fan with up to three different speeds or no fan at  
all. Multi-speed fans are switched at the same switching levels  
as multi-staged heating control points (see Fig. 9). For  
example, a three-speed fan will switch ON its first speed at  
the same control level as the first stage of heating or cooling  
up until the second stage of heating or cooling where the  
second fan speed will switch on. A two stage fan will switch  
with the first two stages of a 3-stage heating or cooling  
system. Likewise, a single speed fan will turn ON at the first  
stage of any multi-staged system. Conversely, a multi-speed  
fan may follow multiple switching levels even for single-  
staged, floating, PWM, or thermal actuator-based systems.  
Table 7. Hardware options summary  
option  
fan type  
possible configurations  
no fan  
one-speed  
two-speed  
three-speed  
enabled  
disabled  
two-pipe  
four-pipe  
fan interlock  
FCU system type  
Hysteresis  
output 1 actuator  
type  
floating  
The hysteresis for fan speed extends to the next lower  
switching level (or a control level of 0) as is shown in Fig. 9.  
For example, the second fan speed will remain ON until the  
control level falls below the switching point for the first fan  
speed. Minimum ON/OFF times can be configured and will  
apply to all fan switching points.  
floating mid (one for heat/cool)1  
one-stage  
two-stage  
three-stage  
PWM  
thermal  
floating  
output 2 actuator  
type  
Interlock  
floating mid (one for heat/cool)1  
one-stage  
A fan interlock can be configured which prevents heating or  
cooling outputs from being turned ON in the event of a fan  
failure (where an air flow detector is installed to detect fan  
failure). When fan interlock is configured, run-up and overrun-  
times can be configured to delay switching ON the heating or  
cooling equipment after switching ON the fan and delay  
switching OFF the fan after the heating or cooling equipment  
is switched OFF.  
two-stage  
three-stage  
PWM  
thermal  
direct  
reverse  
none  
reheat (W7752D and F and  
W7754P1000, only)  
free use (W7752D and F and  
W7754P1000, only)  
not used  
window closed  
occupied sensor  
air flow detector  
cool changeover  
window open  
unoccupied sensor  
no air flow  
heat changeover  
movement  
no movement  
local  
shared  
valve direction  
reheat  
The fan can be configured to run continuously during the zero  
energy band during occupied periods.  
digital input  
wall module option  
temperature sensor  
type  
none  
NTC non-linearized  
NOTE:  
1
The floating-mid option is only for changeover applications  
and uses only one of the two outputs.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Fig. 9. Three-speed fan switching and hysteresis, cooling mode (defaults for switching levels shown)  
Valve action can be configured as either direct or reverse.  
When in a two-pipe system with a changeover input, a floating  
actuator can be used which has the middle position (50%) as  
the zero energy position. The cool range is then 0 to 50% and  
the heat range 50 to 100%. The output must be configured as  
floating-mid.  
Type of Heating and Cooling Equipment  
Excel 10 FCU Controllers can operate with either two-pipe or  
four-pipe systems. A two-pipe system requires a changeover  
input to the controller (hardware or network input).  
Excel 10 FCU Controllers can operate with a variety of  
actuators for heating and cooling equipment. Floating  
actuators can be used; this requires that the valve run time be  
specified during configuration of the controller.  
Multi-stage systems can be controlled with up to three  
different stages of heating/cooling control. Switching levels  
are specified in % of control level (see Fig. 10) as is a  
hysteresis setting which applies to all switching levels.  
Heating and cooling switching levels and hysteresis are  
specified separately. Min. OFF times can be configured, and  
for one-, two- and three-stage systems, a min. ON time can  
also be configured.  
The actuator runtimes can be configured in the range 20 sec  
to 600 sec in steps of 1 second.  
Valves will be synchronized by driving the valve fully closed  
(150% of the valve run time) under the following conditions:  
PWM electronic valves and thermal actuators can also be  
connected and can be configured as either direct or reverse  
action. The cycle time must be specified during configuration.  
In the case of PWM valves, the zero and full positions must  
also be configured.  
whenever the control level reaches 0% or less;  
at power-on;  
whenever the occupancy status changes to a lower mode,  
e.g., from occupied to standby or unoccupied;  
when synchronization has not taken place within the last  
24 hours.  
Additionally, the W7754K1001 features an extra socket  
(located to the left of the terminal blocks) containing a digital  
output suitable for connection to a solid-state relay employed  
for low-voltage PWM control in high-current electric reheat  
applications.  
Once synchronization has been completed, the output control  
will be returned to the normal control loop.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Fig. 10. Three-stage heating/cooling switching (defaults for switching levels and hysteresis shown)  
sensor contact is closed, the effective occupancy mode will be  
"occupied". However, if the TOD schedule indicates an  
Reheat Output  
W7752D and F Controllers and the W7754P1000 have an  
additional high-current (10 A max.; UL916: 6 A max.) output  
relay to control an electric reheater (refer to Fig. 2 for sample  
application). The reheat output has its own switching level and  
hysteresis settings (see Fig. 11). The reheat relay may also  
be used as an auxiliary output for other purposes, in which  
case the controller must be configured to specify that the  
output is under network control instead of the FCU control  
algorithm.  
occupied state and if the occupancy sensor contact is open,  
then the effective occupancy mode will be "standby". The  
control algorithm will then control according to the "standby"  
setpoints configured for the heating and the cooling modes.  
Configuring the digital input for movement or no movement  
(dependent upon normally-open or normally-closed contacts)  
adds a delay of 15 minutes to the occupancy sensor such that  
the space is considered occupied until 15 minutes has  
elapsed since the last movement is detected.  
If the digital input is configured to read input from a window  
open/closed contact, heating, cooling, and fan control will be  
disabled while the window is detected open. Frost protection  
will be enabled. A set of contacts may be wired in series for  
multiple windows. If the window open/closed contact is not  
configured, a one-to-one association (binding) of the window  
sensor from another controller on the LONWORKS network can  
be made. A locally-wired contact can also be used in  
combination with the network input, the result being a logical  
OR of the inputs.  
If the digital input is configured to read input from an air flow  
detector (fan status), heating and cooling control will be  
disabled for a fan failure (fan ON and no air flow detected).  
Fig. 11. Reheat switching and hysteresis (defaults  
shown)  
The input may also be configured for changeover for a two-  
pipe system.  
Digital Input  
The Excel 10 W7752 FCU Controllers are equipped with a  
single digital input which may be configured to accommodate  
an occupancy sensor, a window open/closed contact, an air  
flow detector (for fan failure detection), or a changeover input.  
It is possible to configure this input for either normally-open or  
normally-closed contacts for any of the switches.  
The Excel 10 W7754 FCU Controllers are equipped with a  
second digital input which is permanently assigned (i.e. not  
configurable using the plug-in) to the window contact function.  
The control algorithm in the Excel 10 FCU Controller uses the  
occupancy sensor, if configured, to determine the effective  
occupancy mode (see Table 3). If the Time Of Day (TOD)  
schedule indicates an occupied state, and the eccupancy  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Excel 10 Wall Module Options  
A typical FCU installation will include an Excel 10 wall module  
containing a 20k ohm NTC room temperature sensor and  
additional features depending on the wall module type (see  
Excel 10 wall module literature for further information).  
Common Temperature Control (Master/Slave Controllers)  
When one or more Excel 10 FCU Controllers serve a  
common area and a single temperature sensor is to be used,  
a master/slave arrangement can be configured. One Excel 10  
FCU Controller is configured for the local wall module with the  
desired options. The other Excel 10 FCU Controller(s) will be  
configured without wall modules and with certain network  
variables bound with the master controller. Refer to  
Excel 10 FCU Controllers can use a return air sensor rather  
than the sensor in the wall module if it is wired to the wall  
module sensor input. Setpoint adjustments can be configured  
as relative or absolute, and upper and lower limits can be set.  
A configuration option for the fan speed switch allows it to be  
disabled if not required. The bypass button can be configured  
to override the control mode to "occupied" for a configurable  
bypass time and to override the control mode to "unoccupied"  
for an indefinite time, or it may be configured to only override  
to "occupied". The button may also be used to cancel the  
override.  
Application Step 6 of this document for more details.  
IMPORTANT  
The slave units must have the same HVAC  
equipment connected to it as the master units.  
The slave units will not use any internal temperature  
setpoints or control algorithms. The master controller  
determines heating/cooling output based upon  
setpoints and occupancy and LONWORKS network  
command mode status and communicates this to the  
slave via the LONWORKS network.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Abbreviations and Definitions  
LONWORKS  
Echelon® LONWORKS® network for  
communication among Excel 10 FCU  
Controllers.  
CARE  
Computer Aided Regulation Engineering;  
the PC based tool used to configure  
LonWorks devices.  
NEC  
National Electrical Code; the body of  
standards for safe field-wiring practices.  
CPU  
Central Processing Unit; an EXCEL 5000®  
System controller module.  
NEMA  
National Electrical Manufacturers  
Association; the standards developed by an  
organization of companies for safe field  
wiring practices.  
Echelon®  
The company that developed the  
®
LONWORKS network and the Neuron® chips  
used to communicate on it.  
NV  
Network Variable; an Excel 10 FCU  
Controller parameter that can be viewed or  
modified over the LONWORKS network.  
EMI  
Electromagnetic Interference; electrical  
noise that can cause problems with  
communications signals.  
OEM  
Original Equipment Manufacturer; the  
company that builds the fan coil units.  
EMS  
Energy Management System; refers to the  
controllers and algorithms responsible for  
calculating optimum operational parameters  
for max. energy savings in the building.  
PC  
Personal Computer.  
Pot  
Potentiometer. A variable resistance  
electronic component located on Excel 10  
wall modules. Used to allow user-adjusted  
Setpoints to be inputted into the Excel 10  
FCU Controller.  
EEPROM  
EPROM  
Electrically Erasable Programmable Read  
Only Memory; the variable storage area for  
saving user setpoint values and factory  
calibration information.  
Erasable Programmable Read Only  
Memory; the firmware that contains the  
control algorithms for the Excel 10 FCU  
Controller.  
segment  
A LONWORKS section containing no more  
than 60 Excel 10s. Two segments can be  
joined together using a router.  
Subnet  
TOD  
VA  
An LONWORKS segment that is separated by  
a router from its Q7750A Zone Manager.  
Firmware  
Software stored in a nonvolatile memory  
medium such as an EPROM.  
Time-Of-Day; the scheduling of Occupied  
and Unoccupied times of operation.  
I/O  
I x R  
K
Input/Output; the physical sensors and  
actuators connected to a controller.  
Volt Amperes; a measure of electrical power  
output or consumption as applicable to an  
ac device.  
I times R or current times resistance; refers  
to Ohms Law: V = I x R.  
Kelvin.  
Vac  
Voltage alternating current; ac voltage as  
opposed to dc voltage.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
engineering process to ensure their implementation when  
configuring the controllers. (See section "Step 6. Configure  
Controllers" [page 25] for information on the various Excel 10  
FCU Controller parameters and on Excel 10 FCU Controller  
point mapping.)  
APPLICATION STEPS  
Overview  
Steps one through seven (see Table 8) address con-  
siderations for engineering an Excel 10 FCU System. These  
Step 2. Determine Other Bus Devices  
Required  
A max. of 62 nodes can communicate on a single LONWORKS  
segment. If more nodes are required, a router is necessary.  
Using a router allows up to 125 nodes, divided between two  
LONWORKS segments. The router accounts for two of these  
nodes (one node on each side of the router). Table 9  
steps are guidelines intended to aid understanding of the pro-  
duct I/O options, bus arrangement choices, configuration  
options and the Excel 10 FCU Controllers’ role in the overall  
EXCEL 5000® System architecture.  
Table 8. Application steps  
Step No.  
Description  
1
2
3
4
5
6
7
Plan the System  
summarizes the LONWORKS segment configuration rules.  
Determine Other Bus Devices Required  
Lay Out Communication and Power Wiring  
Prepare Wiring Diagrams  
Order Equipment  
Configure Controllers  
Troubleshooting  
Table 9. LonWorks configuration rules and number of  
device nodes  
One LONWORKS Segment  
Max. No. of Nodes = 62  
(Example)  
Max. no. of Excel 10 60 nodes (T7460/T7560 wall  
Controllers modules are not LONWORKS  
nodes)  
Step 1. Plan the System  
Plan the use of the FCU Controllers according to the job  
requirements. Determine the location, functionality and sensor  
or actuator usage. Verify the sales estimate of the number of  
FCU Controllers and wall modules required for each model  
type. Also check the number and type of output actuators and  
other accessories required.  
Total 62 nodes  
Two LONWORKS Segments  
Max. No. of Nodes = 125  
(Example)  
Max. no. of Excel 10 60 nodes (T7460/T7560 wall  
Controllers in segment modules are not LONWORKS  
number one nodes)  
Max. no. of Excel 10 60 nodes (T7460/T7560 wall  
Controllers in segment modules are not LONWORKS  
number two nodes)  
When planning the system layout, consider potential ex-  
pansion possibilities to allow for future growth. Planning is  
very important to be prepared for adding HVAC systems and  
controllers in future projects.  
Total 125 nodes  
The max. length of an FTT LONWORKS segment is 4600 ft  
(1400 m) for a daisy chain configuration or 1650 ft (500 m)  
total wire length and (400 m) node-to-node for any other type  
of configuration.  
notebook PC  
using an LNS tool  
shielded  
interface  
cable  
NOTE: In the case of FTT LONWORKS segments, the  
distance from each transceiver to all other trans-  
ceivers and to the termination must not exceed the  
max. node-to-node distance. If multiple paths exist,  
the longest one should be used for the calculation.  
Excel 10  
FCU  
controller  
RS-232  
serial  
port  
LonWorks  
SLTA  
port  
If longer runs are required, add a router in order to partition  
the system into two segments.  
In addition, all LONWORKS segments require the installation of  
a Bus Termination Module. For an FTT LONWORKS segment,  
one or two Termination Modules may be required depending  
upon the bus configuration. See section "Step 3. Lay Out  
Communications and Power Wiring" (page 18) and the  
LONWORKS Termination Module subsection in section "Step 4.  
Prepare Wiring Diagrams" (page 19) for more details.  
Fig. 12. Connecting the portable operator terminal to the  
LONWORKS network  
The LONWORKS communication loop between controllers must  
be laid out according to the guidelines applicable for that  
topology. FCU Controllers use FTT technology which allows  
daisy chain, star, loop or combinations of these bus  
configurations. See section "Step 3. Lay Out Communications  
and Power Wiring" (page 18) for more information on bus  
wiring layout, and see Fig. 13, Fig. 14, and Fig. 15 in section  
"Step 4. Prepare Wiring Diagrams" (page 19) for wiring  
details.  
It is important to understand the interrelationships between  
FCU Controllers on the LONWORKS network early in the job  
17  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
NOTE: Due to the transformer isolation, the bus wiring does  
Step 3. Lay Out Communications and Power  
Wiring  
not have a polarity; that is, it is not important which  
of the two LONWORKS terminals are connected to  
each wire of the twisted pair.  
LONWORKS Layout  
LONWORKS networks can be configured in a variety of ways,  
but the rules listed in Table 9 always apply. Fig. 13 and Fig.  
14 depict two typical daisy chain LONWORKS network layouts;  
one as a single bus segment that has 60 nodes or less, and  
one showing two segments. Fig. 15 shows examples of free  
topology bus layouts. The bus configuration is set up using  
the Network Manager tool.  
The communications bus, LONWORKS, is a 78-kilobit serial link  
that uses transformer isolation and differential Manchester  
encoding. Wire the LONWORKS using wires with specifications  
set forth in Table 10. An FTT LONWORKS can be wired in  
daisy chain, star, loop or any combination thereof as long as  
the max. wire length requirements given in Step 2 are met.  
Excel 10 W7754  
Excel 5000  
Excel 10 W7752  
FCU Controller  
FCU Controller  
Honeywell  
Honeywell  
D-71101 Schönaich  
Made in Germany  
9
10 11 12  
12  
Fig. 13. LONWORKS wiring layout for one daisy-chain network segment  
Excel 10 W7754  
FCU Controller  
Excel 10 W7752  
FCU Controller  
Excel 5000  
Honeywell  
Honeywell  
D-71101 Schönaich  
Made in Germany  
9
10 11 12  
12  
max. 60 nodes  
Excel 10 W7754  
FCU Controller  
Excel 10 W7752  
FCU Controller  
Honeywell  
LonWorks  
router  
Honeywell  
D-71101 Schönaich  
Made in Germany  
9
10 11 12  
12  
max. 60 nodes  
Fig. 14. LONWORKS wiring layout for two daisy-chain network segments  
EN2B-0285GE51 R0909  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Fig. 15. Free topology LONWORKS layout examples  
NOTE: See section "LONWORKS Termination" on page 23 for  
additional details.  
All field wiring must conform to local codes and  
ordinances.  
IMPORTANT  
Notes on Communications Wiring:  
See Table 10 for permitted wire sizes.  
To minimize EMI noise, do not run Triac and/or  
relay output wires in the same conduit as the  
input wires or the LONWORKS communications  
loop.  
All field wiring must conform to local codes and  
ordinances.  
Do not use different wire types or gauges on the  
same LONWORKS segment. The step change in  
line impedance characteristics would cause  
unpredictable reflections on the LONWORKS net-  
work. When using different types is unavoidable,  
use a Q7751A Router at the junction.  
To comply with CE requirements, in the case of  
devices having a voltage range of 50 to 1000 Vac  
or 75 and 1500 Vdc which are not provided with a  
supply cord and a plug or with other means for  
disconnection from the supply having a contact  
separation of at least 3 mm in all poles, the  
means for disconnection must be incorporated in  
the fixed wiring.  
Do not use shielded cable for LONWORKS wiring  
runs. The higher capacitance of the shielded  
cable will cause degradation of communications  
throughput. In noisy (high EMI) environments,  
avoid wire runs parallel to noisy power cables, or  
lines containing lighting dimmer switches, and  
keep at least 3 in. (76 mm) of separation between  
noisy lines and the LONWORKS cable.  
Step 4. Prepare Wiring Diagrams  
General Considerations  
The purpose of this step is to assist the application engineer  
in developing job drawings to meet job specifications.  
NOTE: For field wiring, when two or more wires are to be  
attached to the same connector block terminal, be  
sure to twist them together. Deviation from this rule  
can result in improper electrical contact.  
Make sure that neither of the LONWORKS wires is  
grounded.  
Power Wiring  
IMPORTANT  
Table 10 lists wiring types, sizes, and length restrictions for  
Excel 10 FCU Controller products.  
Notes on Power Wiring:  
19  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table 10. Field wiring reference table (US part numbers shown)  
recommended  
min. wire size  
AWG (mm2)  
specification  
or  
requirement  
wire  
function  
construction  
vendor wire type  
max. length ft (m)  
Honeywell (US)  
AK3791 (one twisted pair)  
AK3792 (two twisted pairs)  
(Europe: Belden  
LONWORKS  
(plenum)  
14 to 20 AWG  
twisted pair solid  
conductor, non-shielded.  
Level IV 140°F  
(60°C) rating  
See Step 2  
(2.0 to 0.5 mm2)  
9H2201504)  
Honeywell (US)  
LONWORKS  
(non-  
plenum)*  
AK3781 (one twisted pair)  
AK3782 (two twisted pairs)  
(Europe: Belden  
14 to 20 AWG  
twisted pair solid  
conductor, non-shielded.  
Level IV 140°F  
(60°C) rating  
See Step 2  
82.5 ft (25 m)  
200 ft (60 m)  
(2.0 to 0.5 mm2)  
9D220150)  
multi-conductor (usually  
five-wire cable bundle); for  
runs >100 ft (30 m),  
twisted pair or shielded  
cable is recommended.  
input  
wiring,  
sensors,  
contacts  
14 to 20 AWG  
140°F (60°C)  
rating  
Standard thermostat wire  
(2.0 to 0.5 mm2)  
14 to 20 AWG  
Honeywell (US)  
AK3702 (18 AWG)  
AK3712 (16 AWG)  
AK3754 (14 AWG)  
or equivalent  
output  
(2.0 to 0.5 mm2) any pair non-shielded (use NEC Class 2  
wiring,  
actuators,  
relays  
20 AWG (0.5 mm2)  
acceptable for  
short runs  
heavier wire for longer  
runs).  
140°F (60°C)  
rating  
Honeywell (US)  
AK3754 (14 AWG)  
(twisted pair)  
Limited by line loss  
effects on power  
consumption.  
(See Line Loss  
subsection.)  
any pair non-shielded (use NEC Class 2  
power  
wiring  
14 to 20 AWG  
heavier wire for longer  
runs).  
140°F (60°C)  
rating  
(2.0 to 0.5 mm2)  
AK3909 (14 AWG) single  
conductor or equivalent  
NOTE: PVC wire must not be used where prohibited by local fire regulations.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Terminal Block Assignment and Wiring Example for the W7752 Controller  
Table 11 illustrates terminal block assignments and wiring for  
an example Excel 10 W7752 FCU Controller installation.  
Table 12 lists wiring information for all possible actuator types.  
Table 11. W7752 Controller: Overview of terminals and functions (by model)  
model  
terminal  
#
function  
D
E
F
G
J
1
2
GND serving terminals 2 and 3  
3
3
3
3
3
a digital input, configurable (using the LNS plug-in) to read input e.g. from a  
window contact, an occupancy sensor, etc.  
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
a digital output, permanently configured to write output switching the wall module's  
LED ON/OFF  
3
4
an analog input, permanently configured to read input from a wall module's  
temperature setpoint adjustment knob  
an analog input, permanently configured to read input on whether the wall  
module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,  
or HIGH and whether the wall module's "occupancy override" button has been  
pressed  
5
6
3
3
3
3
3
an analog input, permanently configured to read input from a room temperature  
sensor  
3
3
3
3
3
7
GND serving terminals 4, 5, and 6  
3
--  
3
--  
3
--  
3
--  
3
--  
8
not used  
9+10  
11+12  
13  
receiving/sending data on the LONWORKS network  
sending/receiving data on the LONWORKS network  
a common terminal for terminals 14 and 15  
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
14  
a triac output, permanently configured to write output to OUT1, opening it  
a triac output, permanently configured to write output to OUT1, opening it  
a common terminal for terminals 17 and 18  
15  
16  
17  
a triac output, permanently configured to write output to OUT2, opening it  
a triac output, permanently configured to write output to OUT2, closing it  
a common terminal for terminals 20, 21, and 22  
18  
19  
relay 1, permanently configured to write output to a three-speed fan, setting it to  
LOW  
20(1)  
21(1)  
22(1)  
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
relay 2, permanently configured to write output to a three-speed fan, setting it to  
MEDIUM  
relay 3, permanently configured to write output to a three-speed fan, setting it to  
HIGH  
23  
24  
the "L" terminal of the power supply (230 Vac, 115 Vac, or 100 Vac, respectively)  
230 230 115 115 100  
the "N" terminal of the power supply (230 Vac, 115 Vac, or 100 Vac, respectively) 230 230 115 115 100  
relay 4, permanently configured to write output to a hardwired electrical reheat  
25+26  
3
--  
3
--  
--  
coil, switching it ON/OFF  
(1) If all three relays (terminals 20, 21, and 22) are switched OFF, the three-speed fan will likewise be switched OFF.  
Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different  
functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the  
outputs have been configured, the corresponding devices can be directly connected to them.  
Table 12. Output assignments of Excel 10 W7752 FCU Controller for various actuator types  
out 1 terminal  
14  
out 2 terminal  
17  
output type  
13  
15  
close  
stage 2  
stage 2  
16  
18  
close  
stage 2  
stage 2  
floating  
1-stage  
2-stage  
24 Vac  
24 Vac  
24 Vac  
24 Vac  
open  
24 Vac  
24 Vac  
24 Vac  
24 Vac  
open  
ON/OFF  
stage 1  
stage 1  
stage 3  
PWM  
ON/OFF  
stage 1  
stage 1  
stage 3  
PWM  
3-stage  
PWM  
thermal  
24 Vac  
24 Vac  
24 Vac  
24 Vac  
ON/OFF  
ON/OFF  
21  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Terminal Block Assignment and Wiring Example for the W7754 Controller  
Table 13 lists the terminals and their functions of the Excel 10 W7754 FCU Controller. Table 14 lists wiring information for all  
possible actuator types.  
Table 13. W7754 Controller: Overview of terminals and functions (by model)  
model  
terminal  
#
function  
K
L
M
N
P
1+2  
3
receiving/sending data on the LONWORKS network; removable plug  
3
3
3
3
3
a digital input, configurable (using the LNS plug-in) to read input e.g. from a  
window contact, an occupancy sensor, etc.  
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
an analog input, permanently configured to read input from a wall module's  
temperature setpoint adjustment knob  
4
5
an analog input, permanently configured to read input from a room temperature  
sensor  
6
7
8
GND serving terminals 4, 5, 9, 10, and 11  
not used  
3
--  
3
3
--  
3
3
--  
3
3
--  
3
3
--  
3
GND serving terminal 3  
a digital output, permanently configured to write output switching the wall module's  
LED ON/OFF  
9
3
3
3
3
3
an analog input, permanently configured to read input on whether the wall  
module's 3-speed fan control knob has been set to AUTO, OFF, LOW, MEDIUM,  
or HIGH and whether the wall module's "occupancy override" button has been  
pressed  
10  
3
3
3
3
3
a digital input, permanently configured to read input on whether a window contact  
is "open" or "closed"  
11 (1)  
12  
3
--  
--  
3
3
3
--  
--  
3
3
3
--  
--  
3
3
3
--  
--  
3
3
3
--  
not used  
relay 4, permanently configured to write output to a hardwired electrical reheat  
coil, switching it ON/OFF  
13+14  
3
3
3
15  
a common terminal for terminals 16, 17, and 18  
relay 3, permanently configured to write output to a three-speed fan, setting it to  
HIGH  
16 (2)  
relay 2, permanently configured to write output to a three-speed fan, setting it to  
MEDIUM  
17 (2)  
18 (2)  
3
3
3
3
3
3
3
3
3
3
relay 1, permanently configured to write output to a three-speed fan, setting it to  
LOW  
19  
20  
21  
22  
23  
24  
25  
26  
a triac output, permanently configured to write output to OUT1, closing it  
a triac output, permanently configured to write output to OUT1, opening it  
a triac output, permanently configured to write output to OUT2, closing it  
a triac output, permanently configured to write output to OUT2, opening it  
a common terminal for terminals 19 and 20  
--  
--  
--  
3
3
3
--  
3
--  
--  
--  
--  
--  
--  
--  
--  
3
--  
3
3
3
3
3
3
3
3
3
3
3
3
a common terminal for terminals 21 and 22  
"N" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug  
"L" terminal of power supply (24 Vac or 230 Vac, respectively); removable plug  
(1) This digital input can be enabled / disabled using the right DIP switch located on the top of the controller.  
(2) If all three relays (terminals 16, 17, and 18) are switched OFF, the three-speed fan will likewise be switched OFF.  
230 24 230 230 230  
230 24 230 230 230  
Additionally, the W7754K1001 features an extra socket (located to the left of the terminal blocks) containing a digital output  
suitable for attachment to a solid-state relay employed for low-voltage PWM control in high-current electrical reheat applications.  
Using Honeywell's LNS plug-in, you can configure the controller's triac outputs and relay outputs for a variety of different  
functions. E.g. the triac outputs can be configured for connection to either a floating drive or to a thermal actuator. Once the  
outputs have been configured, the corresponding devices can be directly connected to them.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table 14. Output assignments of Excel 10 W7754 FCU Controller for various actuator types  
OUT1  
OUT2  
output type  
floating  
stage  
19  
close  
--  
20  
open  
OFF  
ON  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
ON  
21  
close  
--  
22  
open  
OFF  
ON  
OFF  
ON  
OFF  
OFF  
ON  
OFF  
ON  
--  
0
1
0
1
2
0
1
2
3
--  
--  
1-stage  
--  
--  
OFF  
OFF  
ON  
OFF  
OFF  
ON  
ON  
--  
OFF  
OFF  
ON  
OFF  
OFF  
ON  
ON  
--  
2-stage  
3-stage  
PWM  
thermal  
PWM  
ON/OFF  
PWM  
ON/OFF  
--  
--  
LONWORKS Termination  
One or two LONWORKS terminations are required, depending  
on the given LonWorks bus layout.  
NOTE: The Q7750A Zone Manager has an internal ter-  
mination circuit, although jumpers are required at the  
terminal block to connect it. See form number 95-  
7509 for details.  
Double termination is required only when the network is a  
daisy-chain configuration and the total wire length is greater  
than 1640 ft (500 m). The max. lengths described in Step 2  
must be adhered to for either a daisy chain or free topology  
LONWORKS layout. See Fig. 17 for connection details for a  
doubly terminated bus. See Fig. 18 for connection details for  
a singly terminated bus.  
Fig. 17. Termination Module connections for a doubly-  
terminated FTT network  
Two different LONWORKS termination modules are available:  
LONWORKS termination module, order no.:  
LONWORKS connection / termination module (mountable  
209541B  
on DIN rails and in fuse boxes), order no.:  
XAL-Term  
3
4
1
5
shield  
0
shield  
6
4
3
LON  
Fig. 18. Termination Module connections for a singly-  
terminated FTT network  
Termination  
plug-in  
jumper  
FTT/LPT Bus  
FTT/LPT Free  
Park Position  
removable screw-type  
3-pole terminal block  
L
O
N
L
O
N
Fig. 16. LONWORKS connection and termination module  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Step 5. Order Equipment  
After compiling a bill of materials through completion of the previous application steps, refer to Table 15 for ordering information.  
Contact Honeywell for information about controllers and Excel 10 wall modules with no logo.  
Table 15. Excel 10 FCU Controller ordering information  
Part Number  
Product Description  
Excel 10 FCU Controllers  
Comments  
230 Vac, FTT LONWORKS version w/ relay for  
electrical reheat applications  
230 Vac, FTT LONWORKS version w/o relay  
for electrical reheat applications  
115 Vac, FTT LONWORKS version version w/  
relay for electrical reheat applications  
115 Vac, FTT LONWORKS version w/o relay  
for electrical reheat applications  
100 Vac, FTT LONWORKS version w/o relay  
for electrical reheat applications  
W7752D2007  
W7752E2004  
W7752F2002  
W7752G2000  
W7752J2003  
230 Vac, FTT LONWORKS version w/o releay  
for electrical reheat applications; digital out-  
put for low-voltage PWM control of solid-  
state relay for high-current electric reheat  
applications; one triac  
W7754K1001  
24 Vac, FTT LONWORKS version w/o releay  
for electrical reheat applications; two triacs  
230 Vac, FTT LONWORKS version w/o releay  
for electrical reheat applications  
230 Vac, FTT LONWORKS version w/o releay  
for electrical reheat applications; two triacs  
230 Vac, FTT LONWORKS version w/ releay  
for electrical reheat applications; four triacs  
Excel 10 Wall Modules  
W7754L1009  
W7754M1007  
W7754N1004  
W7754P1000  
T7460, T7560  
See Excel 10 wall module literature for details.  
Return air  
Excel 10 Sensors  
C7068A1007 (Europe)  
Air Temperature Sensor  
Echelon-Based Components and Parts  
209541B  
FTT Termination Module  
Two required per LONWORKS segment.  
205979A (US only)  
SLTA Connector Cable for LONWORKS bus  
Serial interface to wall module or controller.  
Cabling  
Serial Interface Cable, male DB-9 to female Obtain locally from any computer hardware vendor.  
DB-9 or female DB-25.  
Honeywell (US)  
AK3791 (one twisted pair) LONWORKS (plenum): 14 to 20 AWG (2.0 to  
AK3792 (two twisted pairs) 0.5 mm2) twisted pair solid conductor, non-  
Level IV 140°F (60°C) rating  
Belden (Europe)  
9H2201504  
shielded.  
Honeywell (US)  
AK3781 (one twisted pair) LONWORKS (non-plenum): 14 to 20 AWG (2.0  
AK3782 (two twisted pairs) to 0.5 mm2) twisted pair solid conductor, non- Level IV 140°F (60°C) rating  
Belden (Europe)  
9D220150  
shielded.  
Inputs: 18 AWG (1.0 mm2) five wire cable  
bundle.  
Honeywell (US) AK3725  
Standard thermostat wire  
NEC Class 2 140°F (60°C) rating  
Non-plenum  
Honeywell (US) AK3752 Outputs/Power: 14 to 18 AWG (2.0 to  
(typical or equivalent)  
Honeywell (US) AK3702  
(typical or equivalent)  
Honeywell (US) AK3712  
(typical or equivalent)  
Honeywell (US) AK3754  
(typical or equivalent)  
1.0 mm2).  
18 AWG (1.0 mm2) twisted pair.  
16 AWG (1.5 mm2) twisted pair.  
14 AWG (2.0 mm2) two conductor.  
Non-plenum  
Non-plenum  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Step 6. Configure Controllers  
General  
This section will provide details on the configuration options  
for Excel 10 FCU Controllers. See Appendix C for reference  
information.  
1. Output  
2. Input  
3. Equipment Control  
4. Fan  
5. Switching Levels  
6. Zone Options  
7. Miscellaneous  
8. PID  
Using Plug-Ins  
9. Wiring (information only, no configuring).  
The configuration process is primarily performed in a series of  
screens seen as file tabs under the menu option Application  
Selection and is easily followed using the tables included in  
this section. There are 9 file tabs:  
The specific parameters to be configured in each of these four  
categories are tabulated in the following subsections. For a  
complete list of all Excel 10 FCU Controller NV's, see  
Appendix C.  
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Output  
The available options for output configurations with the default values shown are listed in Table 16. See section "Configurations"  
on page 12 for more information about parameters.  
Table 16. FCU Controller output configuration options and default configurations  
default configuration  
W7752  
default configuration  
W7754  
function  
model  
configuration options  
D,F  
E,G,J  
K4  
L
M
N
P
2-pipe (1 valve)  
4-pipe (2 valves)  
system type  
4-pipe  
4-pipe  
4-pipe  
2-pipe  
4-pipe  
no fan  
1-speed fan  
2-speed fan  
3-speed fan  
fan type  
3-speed  
reheat  
3-speed  
not used  
heating  
3-speed  
reheat  
network control (free use)  
not used  
relay 4  
(reheat relay)  
not used  
reheat  
not used  
cooling  
heating  
heat/cool changeover  
output 1  
(triac 1 and 2)3  
control1  
heating  
heating  
floating  
cooling  
floating  
floating  
floating-mid2  
1-stage  
2-stage  
3-stage  
PWM  
output 1  
ther-  
mal  
ther-  
mal  
(triac 1 and 2)3  
type  
floating  
cooling  
floating  
floating  
cooling  
floating  
PWM  
floating  
thermal  
not used  
cooling  
heating  
heat/cool changeover  
output 2  
(triac 3 and 4)3  
control1  
floating  
floating-mid2  
1-stage  
2-stage  
3-stage  
PWM  
output 2  
ther-  
mal  
(triac 3 and 4)3  
type  
thermal  
floating  
thermal  
Notes:  
1. The output mode settings apply only to a 4-pipe system. In a 2-pipe system, output 1 will always operate in the changeover  
mode.  
2. The floating-mid option is for changeover applications, only, and uses only one of the two outputs.  
3. The operation of the triacs based upon the output type is given in Table 12 on page 21 and in Table 14 on page 23.  
4. W7754K1001 is equipped with a low-voltage digital output suitable for connection to a solid-state relay employed for low-  
voltage PWM control in high-current electric reheat applications; this digital output is activated if output 1 type is set to either  
"PWM" or "thermal".  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Input  
The available options for input configurations with the default values shown are listed in Table 17. See sections "Control  
Provided" and "Configurations" above for more information on parameters.  
Table 17. FCU Controller input configuration options  
function  
configuration options  
default  
no sensor  
sensor  
space temperature sensor  
sensor  
none - bypass button is disabled.  
bypass unoccupied - bypass button overrides current mode to occupied  
for configurable bypass time for button press of 1.1 to 4 seconds (single  
press with T7560) or permanently overrides to unoccupied for button  
press of 4.1 to 7 seconds (more than 5 seconds with T7560).  
bypass button  
bypass unoccupied  
LED override  
bypass - bypass button only overrides current mode to occupied and to  
cancel the override again.  
LED override - shows override from bypass button or from network.  
LED occupancy - shows effective occupancy mode.  
LED/LCD  
LCD display - only used with T7560 Wall Modules; occupancy mode is  
represented by different symbols.  
no switch  
fan speed switch  
(or respective T7560  
setting)  
3-position switch  
4-position switch  
5-position switch  
5-position switch  
relative  
no knob  
relative  
absolute middle  
setpoint knob  
limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86  
°F) or DDF (relative setpoint, -9 to 9 DDF)  
-9 DDF (53.6 °F for  
absolute setpoint)  
min. limit setpoint pot  
(limit for setpoint knob in either degrees C (absolute setpoint, 12 to  
30°C) or K (relative setpoint, -5 to 5 K))  
(-5 K (12 °C for  
absolute setpoint))  
limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86  
°F) or DDF (relative setpoint, -9 to 9 DDF)  
9 DDF (86 °F for  
absolute setpoint)  
max. limit septoint pot  
(limit for setpoint knob in either degrees C (absolute setpoint, 12 to 30  
°C) or K (relative setpoint, -5 to 5 K))  
(5 K (30 °C for  
absolute setpoint))  
not used  
window closed  
occupied sensor  
cool changeover  
window open  
unoccupied sensor  
heat changeover  
movement  
digital input  
not used  
no movement  
Notes:  
1. The temperature sensor option no sensor requires that either the FCU Controller be configured as a slave unit receiving  
heating and cooling control levels from the master unit via the network, or that it receive temperature information over the  
network from another device.  
2. The digital input option to be selected is the condition in which the input will be high (switch contact closed).  
3. Furthermore, all W7754 controllers are equipped with an additional digital output which is permanently assigned to the  
function window contact. This digital input is not visible in the configuration with the plug-in. This digital input can be enabled /  
disabled using the right DIP switch located on the top of the controller  
27  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Equipment Control  
The available options for equipment control configurations with the default values shown are listed in the following table. See  
section "Configurations" on page 12 for more information about parameters.  
Table 18. FCU Controller equipment control configuration options  
function  
configuration options  
enabled / disabled  
enabled / disabled  
direct / reverse  
default  
disabled  
disabled  
direct  
output 1 fan interlock  
output 2 fan interlock  
output 1 valve direction1  
output 2 valve direction1  
output 1 min. stage OFF time  
output 2 min. stage OFF time  
direct / reverse  
direct  
0 to 600 seconds  
0 to 600 seconds  
90 s  
90 s  
floating - valve run time (20 to 600 seconds)  
PWM - cycle time (20 to 600 seconds)  
1, 2, and 3-stage – min. ON time (0 to 1200 seconds)  
output 1 valve run time/PWM  
period/min. stage ON time  
150 s  
150 s  
floating - valve run time (20 to 600 seconds)  
PWM - cycle time (20 to 600 seconds)  
1, 2, and 3-stage – min. ON time (0 to 1200 seconds)  
output 2 valve run time/PWM  
period/min. stage ON time  
reheat switching level  
reheat hysteresis  
PWM zero position2  
0 to 100%  
0 to 100%  
0 to 100%  
0 to 100%  
100%  
5%  
0%  
PWM full position2  
100%  
Notes:  
1. Valve action settings apply to floating, PWM, or thermal types.  
2. Settings apply to both actuators if both are PWM.  
Fan  
Available options for fan control are listed in the following table. See section "Configurations" on page 12 for more information  
about parameters.  
Table 19. FCU Controller fan configuration options  
function  
configuration options  
default  
continuous during occupied mode;  
automatic, based on control algorithm  
fan occupancy mode  
automatic  
fan min. ON time1  
fan min. OFF time1  
fan run-up time1  
0 to 1200 seconds  
0
0
0
0
0 to 1200 seconds  
(with fan interlock only) 0 to 600 seconds  
(with fan interlock only) 0 to 600 seconds  
fan overrun time1  
Notes:  
1. Fan run time options apply to all fan speeds.  
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Switching Levels  
See section "Configurations" on page 12 for more information about parameters.  
Table 20. FCU Controller switching levels configuration options  
configuration options  
function  
default  
5%  
cooling stage 1 switching level  
heating stage 1 switching level  
cooling stage 2 switching level  
heating stage 2 switching level  
cooling stage 3 switching level  
heating stage 3 switching level  
cooling hysteresis  
0 to 100%  
0 to 100%  
0 to 100%  
0 to 100%  
0 to 100%  
0 to 100%  
0 to 100%,  
0 to 100%  
5%  
50%  
50%  
75%  
75%  
10%  
10%  
heating hysteresis  
Notes:  
1. Stage switching levels and hysteresis are used for fan control as well as multi-stage heating/cooling outputs  
control.  
Zone Options  
The Zone configuration options are listed in the following table. See section "Configurations" on page 12 for more information  
about parameters.  
Table 21. FCU Controller zone configuration options  
function  
configuration options  
50 to 95°F (10 to 35°C)  
50 to 95°F (10 to 35°C)  
50 to 95°F (10 to 35°C)  
50 to 95°F (10 to 35°C)  
50 to 95°F (10 to 35°C)  
50 to 95°F (10 to 35°C)  
default  
cooling occupied setpoint  
heating occupied setpoint  
cooling standby setpoint  
heating standby setpoint  
cooling unoccupied setpoint  
73.4°F (23°C)  
69.8°F (21°C)  
77°F (25°C)  
66.2°F (19°C)  
82.4°F (28°C)  
60.8°F (16°C)  
heating unoccupied setpoint  
Notes:  
1. Ensure that unoccupied heating<occupied heating<occupied cooling<unoccupied cooling and  
standby heating<standby cooling.  
Miscellaneous  
The options available in the Miscellaneous tab are listed in the following table. See section "Configurations" on page 12 for more  
information about parameters.  
Table 22. FCU Controller miscellaneous configuration options  
function  
configuration options  
default  
Bypass time  
0 to 1080 minutes  
180 minutes  
last wins - the last command from either the wall module or from the  
network has priority.  
Override priority  
last wins  
network wins - a network command always has priority until canceled.  
0 to 18 DDF (0 to 10 K)  
Demand limit control bump  
3.6 DDF (2 K)  
0
Cool rec ramp  
(cooling optimum start gradient)  
-36 DDF/hour to 0 (-20 K/hour to 0)  
0 to 36 DDF/hour (0 to 20 K/hour)  
Heat rec ramp  
(heating optimum start gradient)  
0
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PID  
The options for configuring PID parameters with defaults are shown in the following table. See section "Configurations" on page  
12 for more information about parameters.  
Table 23. FCU Controller PID configuration options  
function  
configuration options  
default  
P control: 2.25 to 180 DDF (1.25 to 100 K) (0 = disable)  
PI control: 3.6 to 180 DDF (2 to 100 K) (0 = disable)  
P control: 2.25 to 180 DDF (1.25 to 100 K) (0 = disable)  
PI control: 3.6 to 180 DDF (2 to 100 K) (0 = disable)  
10 to 3200 seconds (0 = disable)  
cooling proportional gain1  
36 DDF (20 K)  
heating proportional gain1  
36 DDF (20 K)  
cooling reset time  
250 s  
heating reset time  
10 to 3200 seconds (0 = disable)  
250 s  
cooling derivative time  
heating derivative time  
cooling boost temperature  
1 to 3200 seconds (0 = disable)  
0
1 to 3200 seconds (0 = disable)  
0
0.9 to 18 DDF (0.5 to 10 K) (0 = disable)  
0.9 to 18 DDF (0.5 to 10 K) (0 = disable)  
1.8 DDF (1 K)  
1.8 DDF (1 K)  
heating boost temperature  
Notes:  
1. Prior to version 1.0.3, the minimum proportional gain was 7.2 DDF (4 K) for all control algorithms.  
Commissioning  
Commissioning is the process of writing the LONWORKS  
Alarms  
®
When an Excel 10 FCU Controller has an alarm condition, it  
reports it to the central node on the LonWorks network via the  
variable nvoAlarm. See Table 24. The information contained  
in nvoAlarm is:  
addresses, the binding information and the configuration to  
the Excel 10 Controller. Any LNS tool can be used to perform  
these activities, as described in Appendix B.  
Subnet Number: The LonWorks subnet that contains  
the Excel 10 FCU Controller node that has the alarm  
condition.  
ID Number  
Each Excel 10 FCU Controller is shipped with an internal  
Identification Number from the factory called the Neuron ID®.  
The ID number can either be manually entered or it can be  
received from the network. Pressing the bypass push-button  
on the Excel 10 wall module for an FCU Controller when it is  
in Service Mode causes it to broadcast a service message  
containing its Neuron ID number. This ID number is on a  
removable sticker on the controller housing and can be typed  
in manually.  
Node Number: The Excel 10 FCU Controller node that  
has the alarm condition.  
Alarm Type: The specific alarm being issued and return  
to normal. An Excel 10 FCU Controller can provide the  
alarm types listed in Table 24.  
All current alarms are contained in a variable called  
nvoAlarmStatus which is composed of three bytes  
(nvoAlarmStatus.alarm_bit[n] with n = 0 through 2) with a bit  
corresponding to each of the alarms listed in Table 24. The  
coding is ordered in that the least significant bit of  
nvoAlarmStatus.alarm_bit[0] corresponding to alarm type 1,  
the most significant bit corresponding to alarm type 8, the  
least significant bit of nvoAlarmStatus.alarm_bit[1]  
corresponding to alarm type 9, and so on. Even alarms that  
are suppressed in nvoAlarm (see below) are contained in  
nvoAlarmStatus.  
Step 7. Troubleshooting  
Troubleshooting Excel 10 FCU Controllers and Wall  
Modules  
In addition to the following information, refer to the various  
Checkout and Test manuals for these products. See  
Applicable Literature section for form numbers.  
Also, the Excel 10 FCU Controller variables,  
nvoAlarmLog.type[n], where n is 0 through 4, that store the  
last five alarms to occur in the controller, are available.  
Certain alarm conditions are suppressed conditionally as  
follows:  
If an input network variable with failure detect is bound to the  
same node as nvoAlarm, then nvoAlarm and nvoAlarmLog do  
not report the related FCU Controller variable receive failure  
error and its associated return to normal. Suppression only  
occurs when the nvoAlarm is bound to only one node using  
LonWorks subnet/node addressing and only after the input  
variable has actually received a network variable from the  
node since the latest application restart (or power-up  
condition  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table 24. Excel 10 FCU Controller alarms.  
alarm type  
number  
Name of alarm or alarm bit  
meaning of alarm code or alarm bit  
No Alarm/Return to Normal:  
RETURN_TO_NORMAL  
128  
255  
0
Return to no error after being in an error condition. This code is added  
numerically to another alarm code to indicate that the error condition has  
returned to normal.  
ALARM_NOTIFY_DISABLED  
The alarm reporting has been turned OFF by the nviManualMode  
=SUPPRESS_ALARMS. No more alarms are reported until  
nviManualMode turns ON alarm reporting or upon application restart.  
ALM_NO_ALARM  
FCU Alarms:  
No errors since last application restart; initial condition  
ALM_NODE_OFF  
1
2
The control algorithm has stopped due to controller disabled, or in test  
mode, or other conditions  
ALM_FROST  
The space temperature is below the frost alarm limit. The alarm condition  
remains until the temperature exceeds the alarm limit plus hysteresis.  
ALM_INVALID_SETPNT  
ALM_TEMP_SENSOR_FAIL  
ALM_SETPNT_KNOB_FAIL  
ALM_FAN_SPEED_SW_FAIL  
ALM_FAN_FAILURE  
3
4
5
6
7
One of the setpoints is not in the valid range  
Temperature sensor failed  
Remote setpoint potentiometer failed  
Fan speed switch failed  
Fan is commanded to be ON, but the air flow detector input does not  
detect the fan running.  
ALM_COMFAIL_SPACE_TEMP  
ALM_COMFAIL_HVACMODE  
ALM_COMFAIL_SETPTOFFS  
ALM_COMFAIL_SCHEDOCC  
ALM_COMFAIL_DLC  
8
nviSpaceTemp is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
9
nviApplicMode is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
nviSetPtOffset is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviTodEvent is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviDlcShed is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
ALM_COMFAIL_TEMPRESET  
ALM_COMFAIL_ODTEMP  
ALM_COMFAIL_OCCSENSOR  
ALM_COMFAIL_WINDOW  
ALM_COMFAIL_MANHEAT  
ALM_COMFAIL_MANCOOL  
ALM_HW_SW_MISMATCH  
nviTempReset is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviOdTemp is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviSensorOcc is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviWindow is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviManHeat is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
nviManCool is bound and has failed in receiving an update within its  
specified FAILURE_DETECT_TIME  
The software is not compatible with the hardware configuration specified  
by the hardware configuration resistor value. Compatibility is checked  
only once after application restart.  
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Broadcasting the Service Message  
Manual Mode  
The Service Message allows a device on the LonWorks  
network to be positively identified. The Service Message  
contains the controller Neuron ID number and, therefore, can  
be used to confirm the physical location of a particular Excel  
10 FCU Controller in a building.  
The FCU Controller can be put into a manual mode which  
allows manual setting of outputs for system checkout. The  
variable nviManualMode must be set to Mode_Manual using  
the LNS tool. Triac outputs can be set to any combination of  
ON/OFF or can be set to a test position based upon the  
configured valve runtime/cycle time. The fan relays and  
reheat relay (W7752D, F and W7754P1000, only) can also be  
commanded ON/OFF in any combination. The override LED  
can be commanded ON/OFF in this mode also.  
When an Assign Neuron ID command is issued from the LNS  
tool, the node goes into the SERVICE_MESSAGE mode for  
one minute. In the SERVICE_MESSAGE mode, pressing the  
occupancy override button on the remote Excel 10 wall  
module causes the Service Message to be broadcast on the  
network. All other functions are normal in the  
SERVICE_MESSAGE mode. If an FCU Controller does not  
have a bypass button connected, it can still broadcast the  
Service Message on the network by temporarily shorting the  
controller Fan Speed/Bypass input terminal to the AGND  
terminal on the controller (terminals 5 and 7) with the  
controller in SERVICE_MESSAGE mode.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
APPENDIX A: USING AN LNS TOOL TO COMMISSION A FAN COIL UNIT  
the actual Measured Value. When a value is typed in  
and Calibrate is clicked, the offset value is  
Temperature Sensor Calibration  
automatically calculated, displayed, and written to the  
Excel 10 FCU Controller.  
The temperature sensor in the Excel 10 wall modules can be  
calibrated to correct for sensor inaccuracies, wire resistance,  
etc. This allows the Excel 10 FCU Controller to sense the  
space temperature with a high degree of accuracy.  
Procedure  
Select the controller being worked on with the LNS tool.  
From within the LNS tool, with the desired project loaded and  
the SLTA (Q7752A) connected to the LonWorks network,  
perform the following procedure:  
1. Select a controller symbol from a network diagram.  
2. Click on Calibrate from the Controller menu. Once the  
LNS tool logs on to the controller, the Room  
Fig. 19. Calibration dialog box  
Temperature Calibration dialog box appears.  
4. Click on Close after completing adjustments.  
3. The box displays the Current Value of the sensor and  
the current Offset; it also contains a field for entering  
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APPENDIX B: CONFIGURING FOR MASTER/SLAVE OPERATION  
More than one Excel 10 FCU Controller may be used to  
control the temperature of a room. In this situation one  
controller must be identified as the master unit which will  
perform the temperature control algorithm. The other FCU  
Controllers in the room are designated as slave units, and  
their control algorithms are disabled. The slave units receive  
heating, cooling, and fan output information from the master  
controller via network variables sent across the LonWorks  
network. There can be a maximum of one wall module active  
in the room, and it must be wired directly to the master  
controller. If a slave controller has a wall module connected to  
it, the wall module will be ignored.  
If a fan is used in the slave units, all fan control settings must  
be the same as in the master controller.  
All heating and cooling stage switching levels should be  
identical to those of the master controller.  
Zone Control Options  
All zone temperature control options including PID settings  
and miscellaneous settings are used only by the master  
controller and are ignored in the slave units.  
Network Variable Binding  
Configuration of the master controller is the same as for any  
controller operating alone in a room. Configuration of the  
slave controllers must follow the rules described in this  
section. The following sections correspond to the screens in  
the LNS tool used for configuring Excel 10 FCU Controllers.  
An additional section discusses binding of network variables  
to support master/slave configurations.  
In a master/slave configuration, the control algorithm is  
executed in the master controller only. Heating and cooling  
output as calculated by the control algorithm is then sent via  
the network to the slave controllers. The master controller  
output variables nvoHeatOutput and nvoCoolOutput must be  
bound to the slave input variables nviManHeat and  
nviManCool respectively.  
Output Configuration Options  
For a master/slave system using heat/cool changeover, the  
master controller output variable must be bound to the slave  
controllers’ input NV nviApplicMode unless a changeover  
contact is connected to the slave devices. The binding of  
these two NVs is also required in applications where heat/cool  
energy is not always available.  
Slave devices must have their outputs configured identically  
with the master controller. The same system type and  
actuator types must be used. Valve run-times, cycle times,  
and PWM zero and full position configuration options must be  
the same as well. If the master controller has a reheat output,  
the slave units must have one; and both must be configured  
the same. Fan control in the slave units is via network  
command from the master unit.  
The T7780 wall module must be connected to the master  
controller. The master controller output variable nvoFanSpeed  
must be bound to the slave controllers’ input variable  
nviFanSpeedCmd  
IMPORTANT  
The fan minimum on-time must be configured to zero  
in the slave controllers so that the fans in both  
master and slave units switch ON at the same time.  
IMPORTANT  
The OFF position of the fan speed switch on the wall  
module turns OFF heating and cooling control  
functions as well as the fan, so the network variable  
binding described above for fan speed must still be  
performed as described.  
Input Configuration Options  
Slave controllers may have wall modules connected to them,  
but they must be deactivated while the controllers are  
operating as slave units. They must be configured for no  
temperature sensor and no fan speed switch. The digital  
input may be used on the slave units for window open/closed  
or air flow (fan fail) detection and must be configured as such.  
In the case of window sensing, the window status network  
variable must be mapped to the master controller as the slave  
controller does not execute the control algorithm.  
For applications with reheat, the master controller output  
variable nvoReheat must be bound to the slaves’ input  
variable nviReheatRelay.  
Equipment Control Options  
Valve action and fan interlock settings must be the same as  
for the master controller. Output staging hysteresis, minimum  
stage OFF times, and reheat switching and hysteresis should  
be the same as in the master controller.  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
APPENDIX C: LON INTERFACE  
The tables are divided as follows:  
Table C2—Configuration variables  
Table C3—Input variables  
Table C4—Output variables  
Table C5—Unused variables  
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Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciApplVer  
application_type  
version_no  
time[0]  
UBYTE, 0 to 255  
UBYTE, 0 to 255  
UBYTE, 0 to 255  
0
0
0
This configuration variable specifies the current application number of  
the Excel 10 application.  
nciApplVer  
nciApplVer  
This configuration variable specifies the version number of the Excel  
10 application.  
The time stamp of the last change to the Excel 10 application con-  
figuration. Time meets the ANSI C time stamp requirement specifying  
the number of seconds elapsed since midnight (0:00:00), January 1,  
1970. It is represented in the Intel Format and is four bytes in length.  
nciApplVer  
time[1]  
time[2]  
time[3]  
ch[0-17]  
UBYTE, 0 to 255  
UBYTE, 0 to 255  
UBYTE, 0 to 255  
UBYTE, 0 to 255  
0
0
0
0
See above.  
See above.  
See above.  
nciApplVer  
nciApplVer  
nciDeviceName  
This configuration variable specifies the name of each device. This is  
an ASCII string with the a size of 18 characters. A name with all NULLs  
means that the device has not been configured.  
nciLocation  
SNVT_str_asc  
0x00  
This configuration variable is used to provide more descriptive physical  
loacation information than can be provided by the Neuron chip's 6 byte  
location string.  
nciMaxSendTime  
SNVT_temp_p  
0 to 6553 seconds  
0 s from factory  
This configuration variable specifies the maximum time that expires  
before the node object automatically transmits nvoStatus. This pro-  
vides a heartbeat output that can be used by the destination objects to  
ensure that the node is still healthy. The heartbeat output may be  
disabled by setting nciMaxSendTime = 0.  
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Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciRcvHrtBt  
SNVT_time_sec  
0 to 6553 seconds  
0 = Disabled  
0 s from factory  
This configuration variable specifies the maximum time that elapses  
after the last update to  
nviApplicMode  
nviDlcShed  
nviManCool  
nviManHeat  
nviSensorOcc  
nviSetPtOffset  
nviSpaceTemp  
nviTodEvent  
nviWindow  
before these NV inputs adopt their default values. Setting nciRcvHrtBt  
= 0 means, that the assigned NV input does not wait for an periodic  
update, and that it will never revert to any default when not receiving an  
update. If nviSpaceTemp and nviApplicMode are not received at  
regular intervals that are less than the heartbeat time, the controller will  
assume that there is a communication failure and revert to the  
"occupied" mode.  
nciSndHrtBt  
SNVT_time_sec  
0 to 6553 seconds  
0 = Disabled  
0 s from factory  
This configuration variable specifies the maximum time that expires  
before the object automatically transmits the current value of  
nvoActiveSetPt  
nvoAlarm  
nvoApplicMode  
nvoCoolOutput  
nvoFanSpeed  
nvoFcuStatus  
nvoHeatOutpu  
nvoReheatt  
nvoSensorOcc  
nvoSpaceTemp  
nvoTerminalLoad  
nvoUnitStatus  
nvoWindow  
This provides a heartbeat output that can be used by the destination  
objects to ensure that the node is still healthy. The heartbeat output  
may be disabled by setting nciSndHrtBt = 0.  
nciCntrlSettings  
fan_auto_mode  
CONTINUOUS  
AUTO_MODE  
0
1
AUTO_MODE  
This configuration variable specifies the fan operation during the  
"occupied" mode. CONTINUOUS will cause the fan to run even in the  
zero energy band.  
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Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciCntrlSettings  
fan_run_up_time  
SNVT_time_sec  
0 to 600 seconds  
0
0
0
This configuration variable specifies the time the fan runs before the  
outputs are switched ON. It is typically used for electric heat outputs  
with fan interlock (see nciFcuConfig.fan_interlock_0 and _1). The  
interlock must be set.  
nciCntrlSettings  
fan_overrun_time  
SNVT_time_sec  
0 to 600 seconds  
0
This configuration variable specifies the time the fan still runs after the  
control algorithm has turned OFF the cooling/heating outputs. It is  
typically used for electric heat with fan interlock (see  
nciFcuConfig.fan_interlock_0 and _1). The interlock must be set. In  
case of smoke purge the overrun-time will be ignored.  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
nciCntrlSettings  
switch_level_cool[0]  
switch_level_cool[1]  
switch_level_cool[2]  
switch_level_heat[0]  
switch_level_heat[1]  
switch_level_heat[2]  
staging_hysteresis[0]  
staging_hysteresis[1]  
reheat_switch_level  
SNVT_lev_percent  
0 to 100%, 0 = Disable  
5%  
This is the switching level to turn ON stage 1 of the cooling equipment  
(if configured as multistage).  
SNVT_lev_percent  
0 to 100%, 0 = Disable  
50%  
75%  
5%  
This is the switching level to turn ON stage 2 of the cooling equipment  
(if configured as multistage).  
SNVT_lev_percent  
0 to 100%, 0 = Disable  
This is the switching level to turn ON stage 3 of the cooling equipment  
(if configured as multistage).  
SNVT_lev_percent  
0 to 100%, 0 = Disable  
This is the switching level to turn ON stage 1 of the heating equipment  
(if configured as multistage).  
SNVT_lev_percent  
0 to 100%, 0 = Disable  
50%  
75%  
10%  
10%  
100%  
This is the switching level to turn ON stage 2 of the heating equipment  
(if configured as multistage).  
SNVT_lev_percent  
0 to 100%, 0 = Disable  
This is the switching level to turn ON stage 3 of the heating equipment  
(if configured as multistage).  
SNVT_lev_percent  
0 to 100%  
This configuration variable applies only to cool outputs configured as  
multistage outputs and specifies the hysteresis between switching the  
cool stages ON and OFF.  
SNVT_lev_percent  
0 to 100%  
This configuration variable applies only to heat outputs configured as  
multistage outputs and specifies the hysteresis between switching the  
heat stages ON and OFF.  
SNVT_lev_percent  
0 to 100%  
This configuration variable specifies the switch-over control output level  
for the reheat output.  
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Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciCntrlSettings  
reheat_hysteresis  
SNVT_lev_percent  
0 to 100%  
5%  
0
This configuration variable specifies the hysteresis between switching  
the reheat output ON and OFF.  
nciCntrlSettings  
nciCntrlSettings  
nciEnergyManag  
nciEnergyManag  
nciEnergyManag  
nciFcuConfig  
fan_min_on_time  
fan_min_off_time  
si_dlc_setpt_bump  
si_optstart_grad[0]  
si_optstart_grad[1]  
room_temp_sensor  
fan_speed_switch  
SNVT_time_sec  
0 to 1200 seconds  
This configuration variable specifies the minimum time the fan has to  
run when commanded ON by the control algorithm. This time will be  
ignored in case of smoke purge. The min_on_time starts as soon as  
the fan is switched on.  
SNVT_time_sec  
0 to 1200 seconds  
0
This configuration variable specifies the minimum time the fan has to  
remain OFF when commanded OFF by the control algorithm. This time  
will be ignored in case of smoke purge. The min_on_time starts as  
soon as the fan is switched OFF.  
SNVT_temp_p  
0 to 18 DDF (0 to 10 K)  
3.6 DDF (2 K)  
This configuration variable is used to shift the temperature setpoint  
during demand limit control load shedding. When nviDlcShed is  
different from zero, the current occupancy setpoint will be decreased  
by this value for heating and increased for cooling.  
SNVT_temp_p  
-36 to 0 DDF/hr (-20 to 0  
K/hr)  
0 DDF/hr (0 K/hr)  
0 DDF/hr (0 K/hr)  
This configuration variable specifies the cooling gradient used by the  
optimum start function to calculate the optimum time for starting to  
decrease the effective setpoint smoothly from the unoccupied or  
standby cooling setpoint to the occupied cooling setpoint.  
SNVT_temp_p  
0 to 36 DDF/hr (0 to 20 K/hr)  
This configuration variable specifies the heating gradient used to  
determine the optimum time to start increasing the current effective  
setpoint smoothly to the occupied setpoint at the beginning of  
scheduled occupancy.  
BYTE  
NTC_NON_LINEARIZE  
D
This configuration variable specifies whether a direct wired room  
temperature sensor is connected to the node or a room temperature  
value from the network is used.  
NO_TEMP_SENSOR  
NTC_NON_LINEARIZED  
0
2
nciFcuConfig  
BYTE  
NO_SWITCH  
THREE_POSITION  
FOUR_POSITION  
FIVE_POSITION  
FIVE_POSITION  
This configuration variable specifies the type of fan speed switch on  
the wall module.  
0
1
2
3
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40  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciFcuConfig  
DI1_config  
BYTE  
DI_NOT_USED  
This configuration variable specifies the digital input function and type  
of switch. The option to be selected is the one which is the condition for  
a closed switch contact (e.g., normally-closed window switch contact =  
DI_WINDOW_CLOSED, normally-open window switch contact =  
DI_WINDOW_OPEN).  
DI_WINDOW_CLOSED  
DI_OCCUPIED_SENSOR  
DI_AIR_FLOW  
DI_CHANGEOVER_COOL  
DI_WINDOW_OPEN  
DI_UNOCCUPIED_SENS  
DI_NO_AIR_FLOW  
DI_CHANGEOVER_HEAT  
DI_MOVEMENT  
0
1
2
3
4
5
6
7
DI_MOVEMENT and DI_NO_MOVEMENT are supported starting with  
FCU2 version 1.0.3. These configuration settings cause the controller  
to retain the occupied state for 15 minutes after the last movement is  
detected.  
8
DI_NO_MOVEMENT  
DI_NOT_USED  
9
255  
nciFcuConfig  
nciFcuConfig  
nciFcuConfig  
fan_config  
BYTE  
NO_FAN  
ONE_SPEED  
TWO_SPEED  
THREE_SPEED  
THREE_SPEED  
OUTP_HEATING  
OUTP_COOLING  
This configuration variable specifies the type of fan connected to the  
controller.  
0
1
2
3
output_mode[0]  
output_mode[1]  
BYTE  
This configuration variable specifies the operating mode of the output  
1.  
OUTP_COOLING  
OUTP_HEATING  
OUTP_CHANGEOVER  
OUTP_NOT_USED  
0
1
2
255  
BYTE  
This configuration variable specifies the operating mode of the output  
2. This setting is ignored for nciNumValve = TWO_PIPE.  
OUTP_COOLING  
OUTP_HEATING  
OUTP_CHANGEOVER  
OUTP_NOT_USED  
0
1
2
255  
41  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciFcuConfig  
output_type[0]  
BYTE  
FLOATING  
This configuration variable specifies the output type to drive the  
connected actuator for the output 1:  
FLOATING/FLOATING_MID - This setting considers valve_reverse[]  
and cycle_time[]. Synchronization is performed at every restart and at  
least once per day.  
FLOATING  
ONE_STAGE  
TWO_STAGE  
THREE_STAGE  
PWM  
0
1
2
3
4
5
6
ONE_STAGE - Triac 2 is not used.  
THERMAL  
FLOATING_MID  
TWO_STAGE/THREE_STAGE - Triac 1 and 2 used (triac 1 and 2 both  
ON for stage 3). When configured as multistage, cycle_time and  
min_stage_off_time are considered.  
PWM/THERMAL - Triac 2 is not used. Triac 1 operates as a pulse-  
width modulated output, and the cycle time must be specified in  
cycle_time[]. For PWM outputs, PwmZeroPosn and PwmFullPosn must  
also be specified.  
nciFcuConfig  
output_type[1]  
BYTE  
FLOATING  
This configuration variable specifies the output type to drive the  
connected actuator for the output 2 (see above).  
FLOATING  
ONE_STAGE  
TWO_STAGE  
THREE_STAGE  
PWM  
0
1
2
3
4
5
6
THERMAL  
FLOATING_MID  
nciFcuConfig  
nciFcuConfig  
nciFcuConfig  
nciFcuConfig  
valve_reverse_0  
valve_reverse_1  
fan_interlock_0  
fan_interlock_1  
Bit  
DIRECT  
DIRECT  
NO  
This configuration variable applies to only those outputs that have been  
configured as FLOATING, PWM, or THERMAL and specifies the  
direct/reverse operation of output 1.  
DIRECT  
REVERSE  
0
1
Bit  
This configuration variable applies only to those outputs that have been  
configured as FLOATING, PWM, or THERMAL and specifies the  
direct/reverse operation of output 2.  
DIRECT  
REVERSE  
0
1
Bit  
NO  
YES  
This configuration variable configures an interlock between fan and  
output 1 to provide equipment protection for electric heat or  
compressor. fan_interlock_0=1 enables interlock, which guarantees  
output1 to be driven only when the fan is running.  
0
1
Bit  
NO  
YES  
NO  
This configuration variable configures an interlock between fan and  
output 2 to provide equipment protection for electric heat or  
compressor. fan_interlock_1=1 enables interlock, which guarantees  
output2 to be driven only when the fan is running.  
0
1
EN2B-0285GE51 R0909  
42  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciFcuConfig  
cycle_time[0]  
SNVT_time_sec  
150 s for floating  
This configuration variable specifies for the output 1 configured as  
0 to 1200s for stage output  
0 to 600s for floating output  
20 to 600s for PWM output  
FLOATING: the runtime of the valve (time to run from fully closed to  
fully open)  
PWM: the cycle time  
ONE_STAGE, TWO_STAGE, and THREE_STAGE: minimum ON  
time before switching to the next stage.  
nciFcuConfig  
cycle_time[1]  
SNVT_time_sec  
150 s for floating  
This configuration variable specifies for the output 2 configured as  
0 to 1200s for stage output  
0 to 600s for floating output  
20 to 600s for PWM output  
FLOATING: the runtime of the valve (time to run from fully closed to  
fully open)  
PWM: the cycle time  
ONE_STAGE, TWO_STAGE, and THREE_STAGE: minimum ON  
time before switching to the next stage.  
nciFcuConfig  
nciFcuConfig  
nciFcuConfig  
min_stage_off_time[0]  
min_stage_off_time[1]  
reheat_config  
SNVT_time_sec  
0 to 600 seconds  
90 s  
This configuration variable is used only for ONE_STAGE,  
TWO_STAGE, and THREE_STAGE output 1 and specifies the mini-  
mum OFF time before switching to the next stage.  
SNVT_time_sec  
0 to 600 seconds  
90 s  
This configuration variable is used only for ONE_STAGE,  
TWO_STAGE, and THREE_STAGE output 2 and specifies the mini-  
mum OFF time before switching to the next stage  
BYTE  
REHEAT  
FREE_USE  
REL_NOT_USED  
REHEAT  
This configuration variable specifies the usage of the reheat relay.  
FREE_USE specifies that the relay is controlled via the network using  
the nviReheatRelay .  
0
1
255  
nciFcuConfig  
nciFcuConfig  
nciFcuGains  
PwmZeroPosn  
PwmFullPosn  
si_pid_Xp[0]  
SNVT_lev_percent  
0 to 100%  
0%  
This configuration variable specifies the zero position for PWM  
actuators. This setting applies to PWM actuators only and is used for  
both actuators if both are configured as PWM actuators.  
SNVT_lev_percent  
0 to 100%  
100%  
This configuration variable specifies the fully open position for PWM  
actuators. This setting applies to PWM actuators only and is used for  
both actuators if both are configured as PWM actuators.  
SNVT_temp_p  
2.25 to 180 DDF  
(1.25 to 100 K), 0 = Disable  
36 DDF (20 K)  
This configuration variable specifies the throttling range for use in the  
proportional portion of the PID loop gain for the cooling mode. The  
minimum configurable value (not including 0 for disabling) is 3.6 DDF  
(2 K) for PI or 2.25 DDF (1.25 K) for P control. For versions prior to  
1.0.3, the minimum value is 7.2 DDF (4 K).  
43  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciFcuGains  
si_pid_Xp[1]  
SNVT_temp_p  
2.25 to 180 DDF  
(1.25 to 100 K), 0 = Disable  
36 DDF (20 K)  
This configuration variable specifies the throttling range for use in the  
proportional portion of the PID loop gain for the heating mode. The  
minimum configurable value (not including 0 for disabling) is 3.6 DDF  
(2 K) for PI or 2.25 DDF (1.25 K) for P control. For versions prior to  
1.0.3, the minimum value is 7.2 DDF (4 K).  
nciFcuGains  
nciFcuGains  
si_pid_Tn[0]  
si_pid_Tn[1]  
SNVT_time_sec  
10 to 3200 seconds  
0 = Disable  
250 s  
250 s  
This configuration variable specifies the integral time for use in the  
integral portion of the PID loop gain for the cooling mode.  
SNVT_time_sec  
10 to 3200 seconds  
0 = Disable  
This configuration variable specifies the integral time for use in the  
integral portion of the PID loop gain for the heating mode.  
nciFcuGains  
nciFcuGains  
nciFcuGains  
si_pid_Tv[0]  
si_pid_Tv[1]  
si_boost[0]  
SNVT_time_sec  
10 to 3200 seconds  
0 = Disable  
0 s  
This configuration variable specifies the derivative time for use in the  
derivative portion of the PID loop gain for the cooling mode.  
SNVT_time_sec  
10 to 3200 seconds  
0 = Disable  
0 s  
This configuration variable specifies the derivative time for use in the  
derivative portion of the PID loop gain for the heating mode.  
SNVT_temp_p  
0.9 to 18 DDF (0.5 to 10 K)  
0 = Disable  
1.8 DDF (1 K)  
This configuration variable specifies the temperature range to be  
added to the cooling setpoint, above which the cooling output is fully  
open to allow a faster response. For thermal actuators it is the  
hysteresis for thermal control algorithm.  
nciFcuGains  
nciNumValve  
nciSetPnts  
si_boost[1]  
SNVT_temp_p  
0.9 to 18 DDF (0.5 to 10 K)  
0 = Disable  
1.8 DDF (1 K)  
FOUR_PIPE  
73.4°F (23°C)  
This configuration variable specifies the temperature range to be  
subtracted from the heating setpoint, below which the heating output is  
fully open to allow a faster response. For thermal actuators it is the  
hysteresis for thermal control algorithm.  
SNVT_count  
TWO_PIPE  
FOUR_PIPE  
This configuration variable specifies a two-pipe system (one valve) or a  
four-pipe system (two valves). If set to TWO_PIPE, only the output  
terminals for output1 are used. If set to FOUR_PIPE, output1 and  
output2 are defined by nciFcuConfig.output_mode[].  
1
2
occupied_cool  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
This is the default setpoint for the occupied cooling setpoint which is  
used in case there is no locally wired setpoint knob or nviSetpoint has  
not been bound. Where the ZEB for occupied is used, it is derived from  
the difference between occupied_cool and occupied_heat.  
EN2B-0285GE51 R0909  
44  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciSetPnts  
standby_cool  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
77°F (25°C)  
This is the configured setpoint which applies to the standby cooling  
mode. Where the ZEB for standby is used, it is derived from the  
difference between standby_cool and standby_heat.  
nciSetPnts  
nciSetPnts  
unoccupied_cool  
occupied_heat  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
82.4°F (28°C)  
69.8°F (21°C)  
This is the configured setpoint which applies to the unoccupied cooling  
mode.  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
This is the default setpoint for the occupied heating setpoint which is  
used in case there is no locally wired setpoint knob or nviSetpoint has  
not been bound. Where the ZEB for occupied is used, it is derived from  
the difference between occupied_cool and occupied_heat.  
nciSetPnts  
nciSetPnts  
nciWallMod  
standby_heat  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
66.2°F (19°C)  
60.8°F (16°C)  
180 min  
This is the configured setpoint which applies to the standby heating  
mode. Where the ZEB for standby is used, it is derived from the  
difference between standby_cool and standby_heat.  
unoccupied_heat  
ui_bypass_time  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
This is the configured setpoint which applies to the unoccupied heating  
mode.  
UWORD  
0 to 1080 minutes  
This configuration variable specifies the time the controller remains in  
OCCUPIED mode before reverting to the original occupancy mode  
after pressing the override button at the wall module or initiating  
BYPASS via the network. When the bypass mode has been activated,  
the bypass timer is set to ui_bypass_time. When the timer expires,  
nvoFcuStatus.occ_status.hw_override reverts from OC_BYPASS to  
OC_NUL to quit the bypass override function.  
nciWallMod  
nciWallMod  
nciWallMod  
si_low_setpt  
si_high_setpt  
SNVT_temp_p  
-9 to 9 DDF (-5 to 5 K) for  
relative  
53.6 to 86°F (12 to 30°C) for  
absolute  
-9 DDF (-5 K)  
(53.6°F (12°C) for  
absolute setpoint)  
This configuration variable specifies the low limit for the setpoint knob.  
It can be relative or absolute depending upon the configuration in  
nciWallMod.set_pnt_knob.  
SNVT_temp_p  
-9 to 9 DDF (-5 to 5 K) for  
relative  
53.6 to 86°F (12 to 30°C) for  
absolute  
9 DDF (5 K)  
(86°F (30°C) for  
absolute setpoint)  
This configuration variable specifies the high limit for the setpoint knob.  
It can be relative or absolute depending upon the configuration in  
nciWallMod.set_pnt_knob.  
si_space_temp_zero_  
cal  
SNVT_temp_p  
--9 to 9 DDF (-5 to 5 K)  
0 DDF (0 K)  
The space temperature sensor is corrected by adding this calibration  
setting (an offset value) to the sensed value.  
45  
 
EN2B-0285GE51 R0909  
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C2. Configuration Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciWallMod  
use_wall_mod_st_pt  
Bit  
NO  
YES  
YES  
This configuration variable specifies whether the setpoint used is from  
the knob on the wall module connected to the controller or from the  
network via nciTempSetPts. If set to NO, all setpoints to be used come  
from the network via nciTempSetPts. If set to YES, an additional option  
set_pnt_knob must be set to specify type of setpoint adjustment (see  
below).  
0
1
nciWallMod  
set_pnt_knob  
2 Bits  
OFFSET  
ABSOLUTE_MIDDLE  
OFFSET  
This configuration variable specifies specifies the usage of the setpoint  
knob on the wall module for the occupied setpoint. OFFSET specifies a  
relative scale on the wall module where the setpoint is calculated by  
adding the setpoint potentiometer value (± 5 K) to the appropriate  
value of nciTempSetPts. ABSOLUTE_MIDDLE specifies an absolute  
scale on the wall module. The setpoint knob directly determines the  
center point of occupied cooling and heating setpoints. The respective  
cooling and heating setpoint is determined by the setpoint knob  
position adding or subtracting half of the user selectable ZEB defined  
in nciSetPnts.<occ_mode>_cool or nciSetPnts.<occ_mode>_heat .  
This applies to <occ_mode> OCCUPIED and STANDBY.  
0
2
nciWallMod  
override_type  
2 Bits  
BYPASS_UNOCCUPIE  
D
This configuration variable specifies the behavior of the override  
button. BYPASS_UNOCCUPIED allows overriding the current  
occupancy mode to OCCUPIED for a configurable bypass time, or  
causing a permanent override to UNOCCUPIED. BYPASS allows only  
the temporary override to OCCUPIED and canceling it.  
NO_BUTTON  
BYPASS_UNOCCUPIED  
BYPASS  
0
1
2
nciWallMod  
nciWallMod  
override_priority  
display_type  
Bit  
LAST_WINS  
This configuration variable specifies the priority of the local (wall  
module push-button) or central (network interface) override. If  
NETWORK_WINS is set and the network sends value NUL, then the  
override button is active.  
LAST_WINS  
NETWORK_WINS  
0
1
Bit  
LED_OVERRIDE  
This configuration variable specifies the display of occupancy and/or  
override. LED_OVERRIDE shows the override from the bypass button  
or from the network. LED_OCCUPANCY shows the effective  
occupancy mode. LCD_DISPLAY is only used for T7560 Wall Modules.  
The display shows the occupancy mode with different symbols, and the  
override mode with flashing symbols.  
LED_OVERRIDE  
LED_OCCUPANCY  
LCD_DISPLAY  
0
1
2
EN2B-0285GE51 R0909  
46  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C3. Input Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviApplicMode  
SNVT_hvac_mode  
HVAC_AUTO  
HVAC_HEAT  
HVAC_COOL  
HVAC_OFF  
HVAC_AUTO  
This input variable coordinates the controller operation with the  
main equipment controller. Depending upon the available supply  
energy, the main equipment controller commands the Fan Coil  
Unit controller to operate in heat mode only, cool mode only or  
heat and cool mode if appropriate to the configuration.  
0
1
3
6
(if bound but fails to be  
received or at application  
restart)  
HVAC_NUL  
255  
HVAC_AUTO means that both heating and cooling equipment are  
available, and the current mode is determined by the control  
algorithm depending upon the room temperature and effective  
setpoint. HVAC_AUTO is invalid for changeover applications.  
When the Digital input is configured for Heat/Cool changeover  
input, this input will always have priority over the network  
nviApplicMode’s HVAC_HEAT or HVAC_COOL.  
nviDlcShed  
BYTE  
NORMAL  
SETPOINT_SHIFT  
0 (if bound but fails to be  
received or at application  
restart)  
This input variable is from an energy management system. When  
it is 0, the temperature control algorithm operates in a normal  
mode. When it is 1, the effective setpoint will be shifted by the  
amount defined in nciEmergyManag.si_dlc_setpt_bump. For  
cooling the effective setpoint will be increased, for heating the  
effective setpoint will be decreased always with regard to the frost  
protection limit.  
0
1
nviEmerg  
SNVT_hvac_emerg  
EMERG_NORMAL  
EMERG_PRESSURIZE  
EMERG_DEPRESSURIZE  
EMERG_PURGE  
EMERG_NORMAL  
(at application restart)  
This input variable is an emergency input from a device that  
determines the correct action during a given emergency (such as  
a fire).  
0
1
2
3
4
255  
EMERG_NORMAL, EMERG_NUL: terminate EMERG_  
commands and restores the control algorithm.  
EMERG_PRESSURIZE, EMERG_PURGE,  
EMERG_SHUTDOWN: heat/cool outputs OFF, fan ON at  
highest speed.  
EMERG_SHUTDOWN  
EMERG_NUL  
EMERG_DEPRESSURIZE: heat/cool outputs OFF, fan OFF.  
nviFanSpeedCmd  
nviFanSpeedCmd  
value  
SNVT_switch  
0 to 100%  
100%  
(at application restart)  
This input variable allows control of the fan speed by another  
node, such as another Fan Coil Unit Controller acting as a master  
in a master/slave relationship.  
state  
SNVT_switch  
OFF  
NUL  
See above.  
0
(at application restart)  
ON  
1
NUL  
255  
nviInUse  
UWORD  
0 to 65535  
0 (if bound but fails to be  
received), 65535 ( for 60s  
at application restart)  
This input variable is used by the engineering tool or other  
supervisory node that it is "logged on" to the controller node. It  
should be set every minute, or the controller will reset it after 60s  
to automatically log off the supervisory node.  
47  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C3. Input Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviManCool  
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This input variable can be used for master/slave installations  
where the cool output is controlled by an external controller node.  
In this case, the output signal of the cooling control algorithm (0-  
100%) of the master has to be bound to nviManCool and then  
takes over the task of the local (slave) control algorithm while the  
switch levels operate as locally configured. The heating output will  
be closed.  
nviManHeat  
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This input variable can be used for master/slave installations  
where the heat output is controlled by an external controller node.  
In this case, the output signal of the heating control algorithm (0-  
100%) of the master has to be bound to nviManHeat and then  
takes over the task of the local (slave) control algorithm while the  
switch levels operate as locally configured. The cooling output will  
be closed.  
nviManOccCmd  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
OC_STANDBY  
OC_NUL  
OC_NUL  
(at application restart)  
This input variable is from an network connected operator inter-  
face or other node that indicates the state of manual occupancy  
control (schedule override). It has priority over the time program  
(nviTodEvent). When the BYPASS mode is set, the bypass time is  
active. When the bypass time has elapsed, the master controller  
automatically sets nviManOccCmd to OC_NUL. nviManOccCmd  
does not provide a failure detect mechanism in case no periodic  
update is received.  
0
1
2
3
255  
nviManualMode  
BYTE  
MODE_ENABLE and  
UNSUPPRESS_ALARMS  
(at application restart)  
This input variable is used to disable the controller’s control  
algorithms in order to manually set its physical outputs. The  
controller still responds to smoke purge even when disabled or set  
to manual or factory test mode. It remains unchanged until another  
mode has been commanded or an application restart has been  
performed.  
MODE_ENABLE  
MODE_DISABLE  
MODE_MANUAL  
SUPPRESS_ALARMS  
UNSUPPRESS_ALARMS  
0
1
2
3
4
MODE_ENABLE: starts the control algorithm at an initial state  
after MODE_DISABLE or MODE_MANUAL.  
MODE_DISABLE: all outputs switched OFF, the alarm  
ALARM_NODE_OFF is issued.  
MODE_MANUAL: all control loops are disabled and the alarm  
ALARM_NODE_OFF is issued. The outputs can be controlled  
manually via the nviTest command  
SUPPRESS_ALARMS: nvoAlarm is not sent and  
nvoAlarmStatus and nvoAlarmLog are not updated until  
UNSUPPRESS_ALARMS is set or an application restart.  
UNSUPPRESS_ALARMS: releases alarm suppression after  
SUPPRESS_ALARMS.  
EN2B-0285GE51 R0909  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C3. Input Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviReheatRelay  
value  
SNVT_switch  
0 to 100%  
0 (at application restart)  
This input variable is used to control the reheat relay via the  
network. This permits use of the relay as an auxiliary output in  
applications where reheat is not required as well master/slave  
applications where the reheat output is controlled by another  
controller acting as master.  
nviReheatRelay  
nviRequest  
state  
SNVT_switch  
OFF  
ON  
OFF (at application restart) See above.  
0
1
255  
NUL  
object_id  
SNVT_obj_request  
UWORD  
0=Node Object  
1=Fan Coil Object  
This input variable belongs to the Node Object and provides the  
mechanism to request a particular mode for a particular object  
within a node.  
nviRequest  
object_request  
object_request_t  
Enum from Echelon defined  
RQ_NORMAL  
RQ_UPDATE_STATUS  
RQ_UPDATE_ALARM  
RQ_REPORT_MASK  
See above. Commanding any modes other the ones listed will  
result in an “invalid_request” when reading nvoStatus.  
0
2
4
5
nviSensorOcc  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
OC_NUL  
This input variable allows an occupancy sensor of another Excel  
10 controller to be used to indicate the sensed occupancy state of  
the space. OC_NUL means no input is available because it is not  
bound, bound but not received periodically, or not configured by  
nciFcuConfig.DI1_config. More than one occupancy sensor may  
be bound to nviSensorOcc. If any one sensor detects occupancy,  
the controller considers the space occupied.  
0
1
2
255  
(if bound but fails to be  
received or at application  
restart)  
OC_NUL  
nviSetPoint  
SNVT_temp_p  
50 to 95°F (10 to 35°C)  
327.67°C = INVALID  
INVALID  
(at application restart)  
This input variable is used for binding third party nodes to  
authorize them for setpoint modifications. When this has been  
bound and a valid update is received, the local configured set-  
points will no longer be directly used to determine the current  
occupancy setpoint. For OCCUPIED and STANDBY modes, this  
is used with the appropriate ZEB (derived from the configured  
setpoints), for UNOCCUPIED mode the setpoint does not depend  
upon this input, but upon nciTempSetPts.unoccupied_cool/_heat  
only. nviSetpoint is stored in RAM and gets lost after power  
failure. In this case, the setpoints of nciTempSetPts will be used  
until a valid nviSetpoint is received.  
49  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C3. Input Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviSetPtOffset  
SNVT_temp_p  
0 (if bound but fails to be  
received or at application  
restart)  
This input variable is used for binding third party nodes to  
authorize them for setpoint shifting. nviSetPtOffset is stored in  
RAM and will be initialized to zero after application restart or  
power failure. If nviSetPtOffset is bound and fails to be received  
periodically as configured with nciRcvHrtBt, it will be reset to zero.  
-18 to 18 DDF (-10 to 10 K)  
589.806 DDF (327.67 K) =  
INVALID  
nviSpaceTemp  
SNVT_temp_p  
INVALID  
This input variable is the space temperature transmitted from  
another Excel 10 controller or another node that has a tem-  
perature sensor wired to it. If bound or has a value other than  
INVALID, then it is used as the sensed space temperature instead  
of the wired wall module's temperature. nviSpaceTemp may be  
set to a value other than INVALID using a LNS tool when  
nviSpaceTemp is not bound to set the temperature to a fixed  
value.  
0 to 104°F (0 to 40°C)  
621.806°F (327.67°C) =  
INVALID  
(if bound but fails to be  
received or at application  
restart)  
nviTest  
output1_cmd  
BYTE  
NORMAL_HC_MODE  
(at application restart)  
This input variable is used by factory test, OEM field test, field  
installation, and field testing to manually command the physical  
output 1 when the node has been put into manual mode  
(nviManualMode = MODE_MANUAL).  
NORMAL_HC_MODE: output 1 remains in its current position  
OFF1_OFF2, ON1_OFF2, OFF1_ON2, ON1_ON2: set the  
individual triacs ON or OFF  
NORMAL_HC_MODE  
OFF1_OFF2  
ON1_OFF2  
OFF1_ON2  
ON1_ON2  
0
1
2
3
4
5
TESTPOSITION  
TESTPOSITION: sets output based upon output1_test_pos.  
nviTest  
nviTest  
output1_test_pos  
output2_cmd  
SNVT_lev_percent  
0 to 100%  
0 (at application restart)  
This input variable is used for the TESTPOSITION of the  
output1_cmd and is based upon the configured runtime/cycle  
time.  
BYTE  
NORMAL_HC_MODE  
(at application restart)  
Same as output1_cmd for output 2.  
NORMAL_HC_MODE  
OFF1_OFF2  
ON1_OFF2  
OFF1_ON2  
ON1_ON2  
0
1
2
3
4
5
TESTPOSITION  
nviTest  
nviTest  
output2_test_pos  
reheat_cmd  
SNVT_lev_percent  
0 to 100%  
0 (at application restart)  
Same as output1_test_pos for output 2  
BYTE  
NORMAL_HC_MODE  
(at application restart)  
This input variable is used to test the reheat relay.  
NORMAL_HC_MODE  
OFF1_OFF2  
ON1_ON2  
0
1
4
EN2B-0285GE51 R0909  
50  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C3. Input Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviTest  
fan_control  
BYTE  
NORMAL_FAN_MODE  
(at application restart)  
This input variable is used to test the fan speed relays.  
NORMAL_FAN_MODE  
OFF1_OFF2_OFF3  
ON1_OFF2_OFF3  
OFF1_ON2_OFF3  
ON1_ON2_OFF3  
OFF1_OFF2_ON3  
ON1_OFF2_ON3  
OFF1_ON2_ON3  
ON1_ON2_ON3  
0
1
2
3
4
5
6
7
8
nviTest  
override_LED  
current_state  
BYTE  
NORMAL_LED_MODE  
LED_OFF  
NORMAL_LED_MODE  
(at application restart)  
This input variable can be used to test the wall module LED when  
nviManualMode = MODE_MANUAL.  
0
1
2
LED_ON  
nviTodEvent  
SNVT_tod_event.current_state  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_STANDBY  
OC_OCCUPIED  
(if bound but fails to be  
received or at application  
restart)  
This input variable indicates to the node whether the space is  
currently scheduled to be occupied, standby or unoccupied.  
0
1
3
OC_NUL  
255  
nviTodEvent  
next_state  
SNVT_tod_event.next_state  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_STANDBY  
OC_OCCUPIED  
(if bound but fails to be  
received or at application  
restart)  
This input variable indicates to the node whether the next  
scheduled occupancy mode will be occupied, standby or  
unoccupied. This information is required by the controller to  
perform the optimum start strategy.  
0
1
3
OC_NUL  
255  
nviTodEvent  
time_to_next_state  
SNVT_tod_event.time_to_next_s  
tate  
UWORD  
0 (if bound but fails to be  
received or at application  
restart)  
This input variable specifies the time in minutes until the next  
change of scheduled occupancy state. This data is also used by  
the optimum start calculation (see nciEnergyManag).  
0 to 2880 minutes  
51  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C3. Input Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviWindow  
value  
SNVT_switch.value  
0 to 100%  
0 (if bound but fails to be  
received or at application  
restart)  
This input variable allows a window contact node or another  
controller to be used as remote window contact. More than one  
nvoWindow may be bound to one nviWindow, which allows one  
node to be used to handle several distributed window contacts. In  
this case the control process assumes an open window if at least  
one bound window node detects an open window. ‘Window  
Closed’ would be assumed if all nvoWindows bound to nviWindow  
indicate the window being closed for at least the failure detect time  
(nciSndHrtBt).  
nviWindow  
state  
SNVT_switch.state  
CLOSED  
OPEN  
NO_WINDOW  
See above.  
0
1
255  
(if bound but fails to be  
received or at application  
restart)  
NO_WINDOW  
EN2B-0285GE51 R0909  
52  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nvoActiveSetPt  
SNVT_temp_p  
This output variable shows the active setpoint of the control  
algorithm. It is based upon the occupancy setpoints, the offset, and  
recovery ramping.  
50 to 95°F (10 to 35°C)  
621.806°F (327.67°C) =  
INVALID  
nvoAlarm  
nvoAlarm  
subnet  
UBYTE  
0 to 255  
This output variable is the LonWorks subnet number (in domain  
entry 1 of the node’s domain table).  
node  
type  
UBYTE  
0 to 255  
This output variable is the LonWorks node number (in domain  
entry 1 of the node’s domain table).  
nvoAlarm  
UBYTE  
RETURN_TO_NORMAL This output variable reports the latest changed error condition  
ALM_NO_ALARM  
ALM_NODE_OFF  
ALM_FROST  
0
1
2
3
4
5
6
7
(at application restart)  
detected in the node. The first 5 bits are used for the alarm type  
number, and this number is added to RETURN_TO_NORMAL  
(128) when the error condition is no longer true. Each error  
condition/return-to-normal is issued only once. The type is also  
recorded in nvoAlarmLog and nvoFcuStatus.alarm_type.  
(continued)  
ALM_INVALID_SETPNT  
ALM_TEMP_SENSOR_FAIL  
ALM_SETPNT_KNOB_FAIL  
ALM_FAN_SPEED_SW_FAIL  
ALM_FAN_FAILURE  
ALM_COMFAIL_SPACETEMP  
ALM_COMFAIL_HVACMODE  
ALM_COMFAIL_SETPTOFFS  
ALM_COMFAIL_SCHEDOCC  
ALM_COMFAIL_DLC  
ALM_COMFAIL_TEMPRESET  
ALM_COMFAIL_ODTEMP  
ALM_COMFAIL_OCCSENSOR  
ALM_COMFAIL_WINDOW  
ALM_COMFAIL_MANHEAT  
ALM_COMFAIL_MANCOOL  
ALM_HW_SW_MISMATCH  
RETURN_TO_NORMAL  
RTN_NODE_OFF  
Alarm reporting is suppressed by settin nviManualMode to  
SUPPRESS_ALARMS, in which case nvoAlarm.type is set to  
ALARM_NOTIFY_DISABLED. Alarm reporting is turned ON again  
by setting nviManualMode to UNSUPPRESS_ALARMS, after  
which all existing alarms (or ALM_NO_ALARM) are reported one  
at a time.  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
128  
129  
130  
131  
132  
133  
134  
135  
136  
137  
RTN_FROST  
RTN_INVALID_SETPNT  
RTN_TEMP_SENSOR_FAIL  
RTN_SETPNT_KNOB_FAIL  
RTN_FAN_SPEED_SW_FAIL  
RTN_FAN_FAILURE  
RTN_COMFAIL_SPACETEMP  
RTN_COMFAIL_HVACMODE  
nvoAlarm  
53  
 
EN2B-0285GE51 R0909  
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
138  
139  
140  
141  
142  
143  
144  
145  
146  
147  
255  
RTN_COMFAIL_SETPTOFFS  
RTN_COMFAIL_SCHEDOCC  
RTN_COMFAIL_DLC  
RTN_COMFAIL_TEMPRESET  
RTN_COMFAIL_ODTEMP  
RTN_COMFAIL_OCCSENSOR  
RTN_COMFAIL_WINDOW  
RTN_COMFAIL_MANHEAT  
RTN_COMFAIL_MANCOOL  
RTN_HW_SW_MISMATCH  
ALARM_NOTIFY_DISABLED  
nvoAlarmLog  
alarm_type[0]  
Same as nvoAlarm.type  
See nvoAlarm.type  
A central node may poll this output variable for a short history of  
alarms. It contains the last five alarms reported via nvoAlarm. At  
the time a new nvoAlarm is issued, nvoAlarmLog is updated.  
nvoAlarmLog  
nvoAlarmLog  
nvoAlarmLog  
nvoAlarmLog  
nvoAlarmStatus  
alarm_type[1]  
alarm_type[2]  
alarm_type[3]  
alarm_type[4]  
error_bit[0]  
Same as nvoAlarm.type  
Same as nvoAlarm.type  
Same as nvoAlarm.type  
Same as nvoAlarm.type  
See nvoAlarm.type  
See nvoAlarm.type  
See nvoAlarm.type  
See nvoAlarm.type  
See above.  
See above.  
See above.  
See above. nvoAlarmLog.alarm_type[4] is the oldest alarm.  
UBYTE  
Bit coded Alarm:  
ALM_NODE_OFF  
ALM_FROST  
ALM_INVALID_SETPNT  
ALM_TEMP_SENSOR_FAIL  
ALM_SETPNT_KNOB_FAIL  
ALM_FAN_SPEED_SW_FAIL  
ALM_FAN_FAILURE  
ALM_COMFAIL_SPACETEMP  
This output variable is a polled output containing a list of all the  
current errors detected by the node. A search for error conditions  
in the node is made periodically. A central node may poll the  
nvoAlarmStatus output for all of the current errors. nvoAlarmStatus  
contains all the current detected errors even though they may be  
suppressed for reporting by nvoAlarm.  
1
2
4
8
16  
32  
64  
128  
nvoAlarmStatus  
error_bit[1]  
UBYTE  
See above.  
Bit coded Alarm:  
ALM_COMFAIL_HVACMODE  
ALM_COMFAIL_SETPTOFFS  
ALM_COMFAIL_SCHEDOCC  
ALM_COMFAIL_DLC  
1
2
4
8
ALM_COMFAIL_TEMPRESET  
ALM_COMFAIL_ODTEMP  
ALM_COMFAIL_OCCSENSOR  
ALM_COMFAIL_WINDOW  
16  
32  
64  
128  
EN2B-0285GE51 R0909  
54  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nvoAlarmStatus  
error_bit[2]  
UBYTE  
See above.  
Bit coded Alarm:  
ALM_COMFAIL_MANHEAT  
ALM_COMFAIL_MANCOOL  
ALM_HW_SW_MISMATCH  
1
2
4
nvoApplicMode  
nvoCoolOutput  
SNVT_hvac_mode  
HVAC_AUTO  
HVAC_HEAT  
HVAC_COOL  
HVAC_OFF  
HVAC_OFF  
(at application restart)  
This output variable is used to coordinate the slave devices with  
the master controller. It reflects the current heat/cool medium  
based upon the available supply energy. This is required for con-  
figurations with heat/cool changeover. HVAC_OFF switches the  
heat/cool control OFF while still providing frost protection and  
reporting status and alarms.  
0
1
3
6
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This output variable is the cooling output which is typically used for  
monitoring or bound to a cooling actuator node or another con-  
troller operating as slave. nvoCoolOutput will be transmitted  
immediately when its value has changed significantly (>= 1%), and  
periodically according to nciSndHrtBt. The output value represents  
the output of the control algorithm but is limited to a range of 0% to  
100%.  
nvoDigitInState  
value  
state  
SNVT_switch.value  
0 to 100%  
This output variable indicates the binary state of the controller's  
digital input which can be configured to support a window contact,  
an occupancy/movement sensor, an air flow contact, or a heat/cool  
changeover contact. It can be bound to another Excel 10 controller  
or a third party node.  
nvoDigitInState  
nvoEffectOcc  
SNVT_switch.state  
OFF  
ON  
See above.  
0
1
255  
NOT_ASSIGNED  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
This output variable reflects the effective occupancy mode derived  
from the time schedule, occupancy sensor, override button, and  
network occupancy override.  
0
1
2
3
OC_STANDBY  
nvoFanSpeed  
nvoFanSpeed  
value  
state  
SNVT_switch.value  
0 to 100%  
0 (at application restart)  
This output variable reports the fan speed for the controller. It can  
be bound to another Excel 10 controller with a fan connected or to  
a third-party fan node.  
SNVT_switch.state  
NO_FAN  
See above.  
OFF  
ON  
0
1
(at application restart)  
55  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
value  
255  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
NO_FAN  
nvoFanSpeedSw  
nvoFanSpeedSw  
value  
SNVT_switch.value  
0 to 100%  
This output variable allows the fan speed switch of a master  
controller to be used for all slave Excel 10 controllers in the same  
room.  
state  
SNVT_switch.state  
See above.  
OFF  
ON  
NO_FAN_SPEED_SW  
nvoFcuStatus  
field_no  
UBYTE  
This output variable is used to indicate which other data field in  
nvoFcuStatus has changed since the last time nvoFcuStatus was  
sent out on the network. If any field has had a significant change,  
only that field is updated, and field_no indicates which field. If three  
or more fields have changed significantly, then all fields are  
updated and field_no is set to 0. All fields are also updated every  
refresh time (55s).  
FIELD_EFFECT_OCC  
FIELD_HW_OVERRIDE  
FIELD_SCHED_OCC  
FIELD_EFF_SEN_OCC  
FIELD_NET_MAN_OCC  
FIELD_HW_SEN_OCC  
FIELD_R_O_LED  
1
2
3
4
5
6
7
FIELD_MODE  
8
FIELD_ALARM_TYPE  
FIELD_DLC_SHED  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
FIELD_EFF_WINDOW_OPEN  
FIELD_HW_WINDOW_OPEN  
FIELD_FAN_FEEDBACK  
FIELD_EXTERNAL_ACTIVE  
FIELD_FAN_STAGES_ACTIVE  
FIELD_OUTPUT_POS_1  
FIELD_OUTPUT_POS_2  
FIELD_REHEAT_RELAY  
FIELD_ACTIVE_SET_PT  
FIELD_SPACE_TEMP  
FIELD_REST_BYPASS_TIME  
nvoFcuStatus  
nvoFcuStatus  
effect_occ  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
This output variable is the effective occupancy mode resulting from  
scheduled occupancy mode, occupancy sensor information,  
bypass push-button, or manual operator interface.  
0
1
2
3
OC_STANDBY  
hw_override  
SNVT_occupancy  
OC_UNOCCUPIED  
OC_BYPASS  
This output variable reports the current state of the remote override  
button.  
1
2
OC_NUL (No Override)  
255  
EN2B-0285GE51 R0909  
56  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nvoFcuStatus  
sched_occ  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
This output variable reports the current scheduled occupancy  
received via the network.  
0
1
2
OC_STANDBY  
3
OC_NUL (No Override)  
255  
nvoFcuStatus  
nvoFcuStatus  
eff_sen_occ  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_NUL (No Override)  
This output variable reports the effective state of occupancy  
sensor(s) connected either to the input terminals or to other nodes  
on the network that are bound to this controller.  
0
1
255  
net_man_occ  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_BYPASS  
This output variable reports the manual occupancy from the  
network.  
0
1
2
OC_STANDBY  
OC_NUL  
3
255  
nvoFcuStatus  
nvoFcuStatus  
hw_sen_occ  
r_o_led  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_NUL  
This output variable reports the state of the occupancy sensor  
wired to the node.  
0
1
255  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCIPIED  
OC_BYPASS  
OC_STANDBY  
OC_NUL  
This output variable reports the current state of the remote override  
LED which indicates the effective schedule override resulting from  
the bypass push-button or a network override.  
OC_OCCUPIED: 2 flashes per second  
OC_UNOCCUPIED: 1 flash per second  
OC_BYPASS: on  
0
1
2
3
255  
OC_STANDBY: 2 flashes per second  
OC_NUL: off  
nvoFcuStatus  
mode  
BYTE  
CTL_COOL  
CTL_HEAT  
This output variable is the current operating mode of the node  
determined by many inputs and arbitrated by control logic.  
CTL_PRESSURIZE disables the heat/cool outputs, fan runs at  
highest speed.  
CTL_DE_PRESSURIZE disables the heat/cool outputs, fan is  
turned OFF.  
CTL_MODE_MANUAL allows turning outputs ON/OFF manually  
through nviTest.  
CTL_MODE_FACTORY_TEST is intended only for the factory.  
CTL_FLOATING_OUT_SYNCH allows enough time (150% valve  
run-time) for the valve(s) are at their initial positions (control  
algorithms are active). The controller then goes into one of the  
0
1
2
3
4
5
6
7
(continued)  
CTL_PRESSURIZE  
CTL_DE_PRESSURIZE  
CTL_MODE_MANUAL  
CTL_MODE_FACTORY_TEST  
CTL_FLOATING_OUT_SYNCH  
CTL_FAN_SWITCH_OFF  
CTL_START_UP_WAIT  
CTL_DISABLED  
8
255  
57  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
normal operating modes, such as CTL_COOL. When the effective  
occupancy changes to unoccupied or 24 hours have elapsed since  
the last start-up or CTL_FLOATING_OUT_SYNCH mode, the  
controller enters this mode again to reset the floating output  
position tracking.  
nvoFcuStatus  
CTL_START_UP_WAIT is the first mode after an application  
restart. No control algorithms are active, and heat/cool outputs stay  
in their default positions. CTL_FLOATING_OUT_SYNCH follows.  
CTL_DISABLED disables heat/cool control.  
nvoFcuStatus  
nvoFcuStatus  
alarm_type  
Same as nvoAlarm.type  
This output variable is the latest alarm detected by the node (if  
any) and has the same value as nvoAlarm.type.  
dlc_shed  
Bit  
This output variable indicates the state of the demand limit control.  
NOT ACTICE  
ACTIVE  
0
1
nvoFcuStatus  
nvoFcuStatus  
eff_window_open  
hw_window_open  
Bit  
This output variable indicates the real status of the window  
detection, either from the digital input or from the network.  
CLOSED or NOT_ASSIGNED  
OPEN  
0
1
Bit  
This output variable indicates the status of the digital input  
configured as a window contact.  
CLOSED or NOT_ASSIGNED  
OPEN  
0
1
nvoFcuStatus  
fan_feedback  
Bit  
This output variable indicates the status of the fan when the digital  
input is configured for an air flow sensor.  
FAN_OFF_AFTER_ON_CMD  
FAN_RUNS  
0
1
nvoFcuStatus  
nvoFcuStatus  
external_active  
Bit  
This output variable applies to nciFcuConfig.reheat_config =  
EXTERNAL only and indicates the state of the relay.  
EXTERNAL_NOT_ACTICE  
EXTERNAL_ACTIVE  
0
1
fan_stages_active  
UBYTE  
F_OFF  
When the controller is configured for one or more fan stages, this  
output variable reports the current fan stage active.  
0
F_SPEED1  
F_SPEED2  
F_SPEED3  
F_NO_FAN  
1
2
3
255  
nvoFcuStatus  
nvoFcuStatus  
output_position[0]  
output_position[1]  
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This output variable indicates the position of the output 1.  
This output variable indicates the position of the output 2.  
SNVT_lev_percent  
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
0 to 100%  
163.835% = INVALID  
nvoFcuStatus  
nvoFcuStatus  
nvoFcuStatus  
reheat_active  
active_set_pt  
space_temp  
SNVT_lev_disc  
ST_OFF  
ST_ON  
This output variable reports the current state of the reheat output,  
when the controller is configured for one.  
0
4
255  
ST_NUL (No Reheat)  
SNVT_temp_p  
This output variable reports the current temperature control point  
calculated from the various setpoints, operating modes, and  
optimum start-up gradients.  
50 to 95°F (10 to 35°C)  
621.806°F (327.67°C) =  
INVALID  
SNVT_temp_p  
This output variable reports the current space temperature used for  
the control algorithm.  
0 to 104°F (0 to 40°C)  
621.806°F (327.67°C) =  
INVALID  
nvoFcuStatus  
rest_bypass_time  
field_no  
UWORD  
0 to 65535 Min  
This output variable shows the current value in minutes of the  
active bypass timer  
nvoFcuStatusP  
Same as nvoFcuStatus.  
This output variable is the same as nvoFcuStatus except not sent  
as heartbeat. This variable is sent only in response to a poll  
request, typically from a supervisory device.  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
effect_occ  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
hw_override  
sched_occ  
eff_sen_occ  
net_man_occ  
hw_sen_occ  
r_o_led  
mode  
alarm_type  
dlc_shed  
eff_window_open  
hw_window_open  
fan_feedback  
59  
 
EN2B-0285GE51 R0909  
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoFcuStatusP  
nvoHeatOutput  
external_active  
fan_stages_active  
output_position[0]  
output_position[1]  
reheat_active  
Same as nvoFcuStatus  
Same as nvoFcuStatus  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
Same as nvoFcuStatus.  
active_set_pt  
space_temp  
rest_bypass_time  
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This output variable is the heating output which is typically used for  
monitoring or bound to a heat actuator node or another Excel 10  
controller operating as slave. nvoHeatOutput will be transmitted  
immediately when its value has changed significantly (>= 1%), and  
periodically according to nciSndHrtBt. The output value represents  
the output of the control algorithm but is limited to a range of 0% to  
100%.  
nvoReheat  
nvoReheat  
value  
state  
SNVT_switch.value  
0 to 100%  
This output variable reports the actual state of the reheat output. It  
can be bound to another Excel 10 controller acting as a slave, or it  
can be bound to a third-party reheat node.  
SNVT_switch.state  
OFF  
ON  
See above.  
0
1
2
NO_REHEAT  
nvoSensor  
nvoSensor  
nvoSensor  
override_button  
contact_state_DI1  
raw_data[0]  
Bit  
This output variable indicates the status of the override push-  
button.  
NOT_PRESSED  
PRESSED  
0
1
Bit  
This output variable indicates the state of the digital input.  
CONTACT_OPEN  
CONTACT_CLOSED  
0
1
UWORD  
0 to 65535  
This output variable contains the analog to digital converter count  
measured from the analog value of the temp. sensor, which  
represents the measured time during the second part of each A/D  
conversion.  
nvoSensor  
nvoSensor  
raw_data[1]  
raw_data[2]  
UWORD  
0 to 65535  
Same as above for the fan speed switch.  
UWORD  
Same as above for the setpoint knob.  
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60  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
0 to 65535  
nvoSensor  
fan_speed_switch  
SNVT_lev_disc  
ST_OFF  
This output variable indicates the position of the fan speed switch  
ON the wall module.  
0
ST_LOW  
1
ST_MED  
2
ST_HIGH  
3
ST_NUL (No Switch)  
255  
nvoSensor  
remote_set_point  
SNVT_temp_p  
-9 to 9 DDF (-5 to 5 K) for  
relative  
This output variable is the setpoint from the wall module setpoint  
knob and may be absolute or relative depending upon  
nciWallMod.set_pnt_knob.  
53.6 to 86°F (12 to 30°C) for  
absolute  
nvoSensor  
nvoSensor  
space_temp  
SNVT_temp_p  
This output variable is the measured space temperature.  
0 to 104°F (0 to 40°C)  
621.806°F (327.67°C) =  
INVALID  
ub_hard_config  
BYTE  
INITIAL  
W7752D, F  
W7752E, G  
INVALID  
INITIAL  
(at application restart)  
This output variable is used to establish hardware-dependent  
factory default configuration settings for the Fan Coil Unit  
controller. Note that D and F versions and E, G and J versions  
differ only in their supply voltage.  
0
4
5
255  
nvoSensorOcc  
nvoSpaceTemp  
SNVT_occupancy  
OC_OCCUPIED  
OC_UNOCCUPIED  
OC_NUL (No Sensor)  
OC_NUL  
(at application restart)  
This output variable shows the state of the locally-wired occupancy  
sensor, if one is configured by nciFcuConfig.DI1_config. OC_NUL  
means no input is available because it is not bound or not  
configured by nciFcuConfig.DI1_config.  
0
1
255  
SNVT_temp_p  
INVALID  
(at application restart)  
This output variable is the sensed space temperature at the node  
taken from the locally-wired sensor. It is typically bound to  
nviSpaceTemp of another node which may not have its own space  
temperature sensor but controls the same space. It is also used for  
monitoring purposes, showing the current space temperature used  
for the control algorithm. nvoSpaceTemp is transmitted  
0 to 104°F (0 to 40°C)  
621.806°F (327.67°C) =  
INVALID  
immediately when its value has changed significantly (> 0.5  
delta°C). The reported space temperature includes the offset  
correction nciWallMod.si_space_temp_zero_cal. If a space  
temperature sensor is not connected or is shorted or if  
61  
EN2B-0285GE51 R0909  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nviSpaceTemp is bound to another node, nvoSpaceTemp is not  
reported on the network.  
nvoStatus  
object_id  
UWORD  
NODE_OBJECT  
FCU_OBJECT  
This output variable belongs to the Node Object and reports the  
status for any object on a node. This is the answer to the  
nviRequest.  
0
1
nvoStatus  
nvoStatus  
invalid_id  
Bit  
This output variable indicates whether nviRequest uses a fault  
object ID.  
VALID_ID  
INVALID_ID  
0
1
invalid_request  
Bit  
This output variable indicates whether nviRequest uses a fault  
request.  
VALID_REQUEST  
INVALID_REQUEST  
0
1
nvoStatus  
disabled  
Bit  
This output variable indicates whether the device is enabled or  
disabled (nviManualMode = DISABLE).  
ENABLED  
DISABLED  
0
1
nvoStatus  
comm_failure  
in_alarm  
Bit  
This output variable indicates whether an update nviRcvHrtBt is  
missing.  
COMMUNICATION_OK  
COMMUNICATION_FAILURE  
0
1
nvoStatus  
Bit  
This output variable indicates whether an alarm occured. See  
nvoAlarm.  
NO_ALARM  
IN_ALARM  
0
1
nvoStatus  
report_mask  
Bit  
This output variable shows the answer to nviRequest >  
REPORT_MASK  
NO_REPORT_MASK  
REPORT_MASK  
0
1
nvoTerminalLoad  
SNVT_lev_percent  
-163..163%  
163.835% = INVALID  
This output variable shows the terminal load, which is a percentage  
between -160% and +160% based upon the control output level.  
Negative values indicate heating load and positive values indicate  
cooling load. 100% is the full terminal capacity. An absolute  
terminal load value of more than 100% indicate that the terminal is  
not able to supply the required heating or cooling energy which at  
the zone controller should cause a demand for more supply  
energy. nvoHeatOutput will be transmitted immediately when its  
value has changed significantly (>= 1%).  
nvoUnitStatus  
mode  
SNVT_hvac_mode  
HVAC_HEAT  
HVAC_COOL  
HVAC_OFF  
This output variable reports the last operating mode of the control  
algorithm. It is not set to HVAC_OFF if the Heating and Cooling  
Output shows 0%. HVAC_OFF is set when the Device is disabled  
from nviRequest, nviManualMode or nviApplicMode.  
1
3
6
EN2B-0285GE51 R0909  
62  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
nvoUnitStatus  
heat_output_primary SNVT_lev_percent  
0 to 100%  
This output variable reports the actual heating output value. Any  
change forces nvoUnitStatus to be transmitted immediately.  
163.835% = INVALID  
nvoUnitStatus  
nvoUnitStatus  
heat_output_  
secondary  
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This output variable reports the reheat output value.  
cool_output  
SNVT_lev_percent  
0 to 100%  
163.835% = INVALID  
This output variable reports the actual cooling output value. A  
change of more than 1% forces nvoUnitStatus to be transmitted  
immediately.  
nvoUnitStatus  
nvoUnitStatus  
fan_output  
in_alarm  
SNVT_lev_percent  
0 to 100%  
This output variable reports the actual fan speed level.  
UBYTE  
NO_ALARM  
ALARM  
This output variable reports the actual alarm status of the controller  
and is set to ALARM_NOTIFY_DISABLE when nviManualMode =  
SUPPRESS_ALARMS.  
0
1
ALARM_NOTIFY_DISABLED  
255  
nvoWindow  
nvoWindow  
value  
state  
SNVT_switch.value  
0 to 100%  
0
This output variable reports the status of the window sensor. It  
allows the locally-wired window sensor to be used by other nodes  
on the network.  
(at application restart)  
SNVT_switch.state  
CLOSED  
NO_WINDOW  
(at application restart)  
See above.  
0
OPEN  
1
NO_WINDOW  
255  
nroPgmVer  
id[0]  
UBYTE, 70 = F  
This output variable identifies the Excel 10 node type by an eight  
byte constant describing the node type, major and minor functional  
release number and bug fix. First character.  
nroPgmVer  
nroPgmVer  
nroPgmVer  
nroPgmVer  
id[1]  
UBYTE, 67 = C  
UBYTE, 85 = U  
UBYTE, 50 = 2  
UBYTE, 0 to 255  
Second character.  
Third character.  
Fourth character.  
id[2]  
id[3]  
major_ver  
Major Functional Release Number:  
1. Add or delete a network variable (NV), nv field.  
2. Change the name of a nv or nv field.  
3. Range or type (short / long) of data in a nv field is changed.  
4. Enumerated value list of a nv field is changed.  
NOTE: Algorithm changes or bug fixes may also be included.  
nroPgmVer  
minor_ver  
UBYTE, 0 to 255  
Minor Functional Release Number:  
EN2B-0285GE51 R0909  
63  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C4. Output Variables for Excel 10 FCU Controllers.  
digital  
state  
or  
engineering units:  
English (metric) or states plus  
range  
NV name  
field name  
default  
comments  
value  
1. Network variables are unchanged.  
(continued)  
2. Functionality of the control algorithm has been revised and  
affects compatibility with other nodes or the equipment being  
controlled.  
nroPgmVer  
nroPgmVer  
3. The network interface or physical input / output subsystem  
was revised and affects compatibility with other nodes.  
NOTE: Bug fixes may also be included in a minor functional  
release.  
bug_ver  
UBYTE, 0 to 255  
Bug Fix Number:  
Network variables are unchanged. A change to the algorithm,  
network interface, or physical input/output subsystem was made  
that does not affect compatibility with other nodes or the equipment  
controlled by the node.  
nroPgmVer  
node_type  
UBYTE, 10 = FCU2  
Node type number.  
EN2B-0285GE51 R0909  
64  
 
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Table C5. Unused Variables for Excel 10 FCU Controllers  
digital  
state  
or  
engineering units:  
English (metric) or states  
plus range  
NV name  
field name  
default  
comments  
value  
nciApplVer  
not_used1  
UBYTE  
Reserved for future use.  
Reserved for future use.  
Reserved for future use.  
Reserved for future use.  
Reserved for future use.  
Reserved for future use.  
Not used.  
nciApplVer  
nciCntrlSettings  
nciFcuConfig  
nciWallMod  
nciWallMod  
nvoFcuStatus  
nvoFcuStatus  
nvoFcuStatusP  
nvoFcuStatusP  
nvoSensor  
nvoStatus  
not_used2  
UBYTE  
reserve  
7 bits  
not_used  
4 bits  
spare_field[0]  
spare_field[1]  
not_used  
UBYTE  
UBYTE  
3 bits  
spare_field[0]  
not_used  
WORD  
Not used.  
Same as nvoFcuStatus  
Not used.  
spare_field[0]  
not_used  
Same as nvoFcuStatus  
Not used  
6 bits  
Reserved for future use.  
Not supported  
out_of_limits  
open_circuit  
out_of_service  
mechanical_fault  
feedback_failure  
over_range  
Bit  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
under_range  
electrical_fault  
unable_to_measure  
fail_self_test  
self_test_in_progress  
Lock ed_out  
manual_control  
in_override  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
Bit  
Not supported  
nvoStatus  
reserved1  
Bit  
Not supported  
nvoStatus  
reserved2  
Bit  
Not supported  
nvoUnitStatus  
econ_output  
SNVT_lev_percent  
Not supported  
65  
 
EN2B-0285GE51 R0909  
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A. La Pièce 16, Switzerland by its Authorized Representative:  
Automation and Control Solutions  
Honeywell GmbH  
Böblinger Strasse 17  
71101 Schönaich  
Germany  
Phone: (49) 7031 63701  
Fax:  
(49) 7031 637493  
Subject to change without notice. Printed in Germany  
EN2B-0285GE51 R0909  
 

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