Honeywell W7752J, W7754P, W7752G, W7754K, W7752D SYSTEM ENGINEERING

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Excel 10

W7752D,E,F,G,J AND W7754K,L,M,N,P

FAN COIL UNIT CONTROLLERS

SYSTEM ENGINEERING

CONTENTS

Revision overview ....................................................................................................................................................................... 2

Introduction.................................................................................................................................................................................. 3

Description of Devices.............................................................................................. 3

Products Covered..................................................................................................... 4

Organization of Manual............................................................................................. 4

Applicable Literature................................................................................................. 4

Product Names......................................................................................................... 4

Control Application ................................................................................................... 4

Control Provided....................................................................................................... 5

Setpoints.............................................................................................................. 6

Bypass ................................................................................................................. 7

LED/LCD.............................................................................................................. 7

Energy-Saving Features ...................................................................................... 8

Occupancy Status................................................................................................ 8

Safety Features.................................................................................................... 9

Operating Modes ............................................................................................... 10

Agency Listings ...................................................................................................... 11

Construction ........................................................................................................... 11

Excel 10 W7752 FCU Controllers...................................................................... 11

Excel 10 W7754 FCU Controllers...................................................................... 11

Controller Performance Specifications .............................................................. 13

Configurations ........................................................................................................ 14

General .............................................................................................................. 14

Fan Type............................................................................................................ 14

Type of Heating and Cooling Equipment ........................................................... 15

Reheat Output.................................................................................................... 16

Digital Input........................................................................................................ 16

Excel 10 Wall Module Options........................................................................... 17

Abbreviations and Definitions ................................................................................. 18

Overview................................................................................................................. 19

Step 1. Plan the System ......................................................................................... 19

Application Steps ...................................................................................................................................................................... 19

Step 2. Determine Other Bus Devices Required .................................................... 19

Step 3. Lay Out Communications and Power Wiring ............................................. 20

ONWORKS Layout.............................................................................................. 20

Power Wiring ..................................................................................................... 22

Step 4. Prepare Wiring Diagrams........................................................................... 22

General Considerations ..................................................................................... 22

Terminal Block Assignment and Wiring Example for the W7752 Controller...... 23

Terminal Block Assignment and Wiring for the W7754 Controller..................... 24

ONWORKS Termination ..................................................................................... 25

Step 5. Order Equipment........................................................................................ 26

Step 6. Configure Controllers ................................................................................. 28

General .............................................................................................................. 28

Output ................................................................................................................ 29

Input................................................................................................................... 30

Equipment Control ............................................................................................. 31

Fan..................................................................................................................... 31

Switching Levels ................................................................................................ 32

Zone Options ..................................................................................................... 32

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Miscellaneous.....................................................................................................32

PID......................................................................................................................33

Commissioning ...................................................................................................33

ID Number ..........................................................................................................33

Excel 10 FCU Controller Point Mapping.............................................................33

Step 7. Troubleshooting ..........................................................................................35

Troubleshooting Excel 10 FCU Controllers and Wall Modules...........................35

Alarms ................................................................................................................35

Broadcasting the Service Message ....................................................................37

Manual Mode......................................................................................................37

Appendix A. Using E-Vision to Commission a Fan Coil Unit .................................................................................................38

Appendix B. Configuring for Master/Slave Operation.............................................................................................................39

Appendix C. Complete List of Excel 10 FCU Controller User Addresses .............................................................................41

Appendix D. Q7750A Excel 10 Zone Manager Point Estimating Guide.................................................................................82

Temperature Sensor Calibration .............................................................................38

Procedure ...........................................................................................................38

Output Configuration Options..................................................................................39

Input Configuration Options.....................................................................................39

Equipment Control Options .....................................................................................39

Zone Control Options ..............................................................................................39

Network Variable Binding ........................................................................................39

Approximate Memory Size Estimating Procedure...................................................82

REVISION OVERVIEW

On the following pages changes have been made compared to the previous release of this document:

Page: Change:

EN0B-0377GE51 R0703 2

EXCEL 10 FAN COIL UNIT CONTROLLER - SYSTEM ENGINEERING

INTRODUCTION

Description of Devices

The W7752D,E,F,G,J and W7754K,L,M,N,P Fan Coil Unit (FCU) Controllers all belong to the Excel 10 family product line. FCU systems control the space temperature in a given room by regulating the heating and/or cooling equipment which control the temperature 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.

Excel 500

The zone controlled by the Excel 10 FCU controllers will typically use an Excel 10 wall module with a temperature sensor for space temperature measurement, analog setpoint input, bypass push-button, and occupancy/unoccupancy override. See page 4 for form numbers of Excel 10 wall module literature for further information.

The Excel 500 can assume all of the Excel 10 FCU controllers' scheduling functions. The number of Excel 10 FCU controllers on the L

ONWORKS network is determined by

the rules of LonWorks network design (see Table 10). Frontends can be either EBNI, SymmetriE, or SynOpsys, depending upon the size and complexity of the connected system.

PCLTA10

PCC10

Excel 10 W7754

FCU Controller

LonWorks network

ONUNUSED

UNUSED

W7754Kxxxx

0345

WALL MOD.

USED

+ -

RS1A

23D25

LON

Honeywell

DI2 USED

230 Vac, 50/60 Hz

D-71101 Schönaich

max. 5 VA unloaded

Made in Ger man y

GND9LED10FAN11DI2

triac

2 A10A

0.5 A

321

4 5 6

23247

1314

15 181716

1920

2122

2526

2A/M

IIIII I

DI1

SET

SENS

534

T7460 / T7560

com

open

GND

230 V

fan

OUT1OUT2

230 V

230 Vac

Excel 10 W7752

FCU Controller

Excel 10

wall module

Fig. 1. Typical EXCEL 5000® System overview

Excel 10

wall module

3 EN0B-0377GE51 R0703

EXCEL 10 FAN COIL UNIT CONTROLLER - SYSTEM ENGINEERING

Products Covered

This System Engineering Guide describes how to apply the Excel 10 FCU controller 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.

• T7560 Wall Modules.

• for further products, see Appendices.

Organization of Manual

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 E-Vision software after the devices and accessories are ordered. Application Step 7 is troubleshooting. Information provided in support of the use of third-party L

ONWORKS communication packages to con-

figure FCU Controllers is found in the Appendices.

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.

Applicable Literature

The following is a list of documents containing information related to the Excel 10 FCU Controller and the EXCEL 5000 System in general.

Form No. Title

EN0B-0376GE51 Excel 10 W7752D,E,F,G,J FCU

Controller Specification Data

EN1B-0250GE51 Excel 10 W7752D,E,F,G,J FCU

Controller Installation Instructions

EN1B-0251GE51 Excel 10 W7754K,L,M,N,P FCU

Controller Installation Instructions

74-3083 Excel 10 T7460 Wall Modules

Specification Data

95-7610 Excel 10 T7460 Wall Modules

Installation Instructions

74-3097 Excel 10 T7560 Wall Modules

Specification Data

95-7620 Excel 10 T7560 Wall Modules

Installation Instructions

74-2950 Excel 10 Q7750A, Excel 10 Zone

Manager Specification Data

95-7509 Excel 10 Q7750A Zone Manager

Installation Instructions.

95-7554 Excel 10 FTT/LPT 209541B

Termination Module Installation Instructions

95-7510 Excel 10 Q7751A Router Installation

Instructions (US only)

95-7511 Excel 10 Q7752A Serial Interface

Installation Instructions (US only) 74-2588 Excel E-Vision User Guide 74-5587 Excel CARE User Guide 74-2039 XBS User’s Manual 74-5018 XBS Application Guide

Product Names

The W7752 Controller is available in five models:

• W7752D FCU Controller with 230 Vac power input and

with reheat relay.

• W7752E FCU Controller with 230 Vac power input without

reheat relay.

• W7752F FCU Controller with 115 Vac power input with

reheat relay.

• W7752G FCU Controller with 115 Vac power input without

reheat relay.

• W7752J FCU Controller with 100 Vac power input without

reheat relay.

The W7754 Controller is available in five models:

• W7754K FCU Controller with 230 Vac power supply, one

triac output, and one digital output for the low-voltage Pulse-Width Modulated (PWM) control of a solid-state relay employed in high-current electric reheat applications

• W7754L FCU Controller with 24 Vac power supply and

two triac outputs

• 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

The 2000-series 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.

• 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.

Other products:

• Q7750A Excel 10 Zone Manager.

• Q7751A Bus Router (US, only).

• Q7752A Serial Adapter (US, only).

• AK3781 L

ONWORKS (non-plenum): 22 AW G (0.325 mm

) twisted pair solid conductor, non-shielded wire (one twisted pair) (US, only).

• AK3782 L

ONWORKS (non-plenum): 22 AW G (0.325 mm

) twisted pair solid conductor, non-shielded wire (two twisted pairs) (US, only).

• AK3791 L

ONWORKS (plenum): 22 AW G (0.325 mm

) twisted pair solid conductor, non-shielded wire (one twisted pair) (US only).

• AK3792 L

ONWORKS (plenum): 22 AW G (0.325 mm

) twisted pair solid conductor, non-shielded wire (two twisted pairs) (US, only).

• C7608A Return Air Sensor (Europe, only). Refer to the Table 15 (see section "Step 5. Order Equipment") for complete listing of all available part numbers.

Control Application

FCU 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 FCU Controller is located in the fan coil unit and is typically connected to an Excel 10 wall module which incorporates a temperature sensor, setpoint and fan

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

speed controls, and a bypass or override button. Fig. 2 shows a typical FCU control application.

Excel 10 W7754

FCU Controller

ONUNUSED

UNUSED

W7754Kxxxx

DI2 USED

GND9LED10FAN11DI2

321 4 5 6 23247

DI1

Honeywell

0345

230 Vac, 50/60 Hz

D-71101 Schönaich

max. 5 VA unloaded

Made in Germany

triac

2 A10A

0.5 A

131415 181716

192021 22

2526

2A/M

III II I

com

open

SET

GND

230 V

fan

SENS

5342 1

OUT1OUT2

230 V

T7460 / T7560

230 Vac

WALL MOD.

USED

+ -

RS1A

23D25

LON

wall

contact

Excel 10

wall module

LonWorks network

Fig. 2. Typical Excel 10 FCU control application

Control Provided

The 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 configurable fan control features include fan min. ON and OFF times, run-up times, and overrun times.

The Excel 10 FCU controllers use a PID control algorithm with which each of the three parameters can be configured. There are additional configurable boost parameters (HeatBoost and CoolBoost) which specify a range outside of which the heating or cooling outputs are turned on fully for faster response (for thermal actuators this specifies the control hysteresis). The controllers are delivered with factory defaults for each of the parameters.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Fig. 3. Control sequence diagram

Setpoints

Setpoint Knob

The Excel 10 FCU controllers may be connected to an Excel 10 wall module equipped with a setpoint knob. When configured (UseWallModSpt), the value from the setpoint knob is used to calculate the "occupied" setpoint for the heating and the cooling modes. There are two options (SptKnob) 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 (SptCoolOcc and SptHeatOcc). When SptKnob is set 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:

"occupied" setpoint:

SrcRmTempSptEff (in cooling mode) =

SrcRmTempSptHw + (SptCoolOcc - SptHeatOcc) / 2

SrcRmTempSptEff (in heating mode) =

SrcRmTempSptHw - (SptCoolOcc - SptHeatOcc) / 2

"standby" setpoints:

SrcRmTempSptEff (in cooling mode) =

SrcRmTempSptHw + (SptCoolStby - SptHeatStby) / 2

SrcRmTempSptEff (in heating mode) =

SrcRmTempSptHw - (SptCoolStby - SptHeatStby) / 2

SptKnobLowLim and SptKnobHiLim. 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 way.

Setpoint from Network

When not configured for UseWallModSpt, DestRmTempSpt must be bound to another node that provides a setpoint. When bound and when a valid update is received, DestRmTempSpt is used with the appropriate ZEB:

ZEBoccupied = SptCoolOcc - SptHeatOcc ZEBstandby = SptCoolStby - SptHeatStby

The "unoccupied" setpoint does not depend on DestRmTempSpt at all.

Setpoint Offset

Third-party nodes may be bound to DestSptOffset in order to shift the setpoint in the range of -18...+18 DDF (-10...+10 K).

When in the "unoccupied" mode, the remote setpoint knob is ignored, and the configured setpoints for those modes are used instead.

Setpoint Limits

Setpoints are limited to the range of 50...95°F (10...35°C). The value of the setpoint knob (SrcRmTempSptHw) is limited to the range provided by the configuration parameters

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 1. Example setpoint values based upon default configuration – "absolute middle" setpoint knob (°C)

occupancy

mode

"occupied" 23 21 2 21 22 20

"standby" 25 19 6 21 24 18

"unoccupied" 28 16 12 X 28 16

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

"occupied" 23 21 2 -2 21 19

"standby" 25 19 6 -2 23 17

"unoccupied" 28 16 12 X 28 16

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

Bypass

Bypass Mode

During periods scheduled as being unoccupied, the Excel 10 wall module's bypass push-button may be used to force the

FCU controller into the "occupied" mode. The FCU controller

can also be forced into the "occupied" mode by means of a

ONWORKS network command (DestManOcc set to

L OC_BYPASS). The controller will then remain in "bypass" mode until:

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 (DestSchedOcc network input) switches the mode to "occupied".

4. The network input DestManOcc is set to OC_NUL.

The Excel 10 wall module indicates the current bypass mode status (see Excel 10 wall module literature for further information).

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).

Continuous Unoccupied Mode

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

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).

configured

cooling setpoint

configured

cooling setpoint

configured

heating setpoint

configured

heating setpoint

ZEB

setpoint

knob

setpoint

knob

effective cooling

setpoint

2,3

effective heating

setpoint

effective heating

setpoint

The FCU controller can also be forced into the "continuous unoccupied" mode by means of a L

ONWORKS network

command (DestManOcc set to OC_UNOCCUPIED). The

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.

Bypass Push-Button

The FCU Controller may be connected to an Excel 10 wall module equipped with a bypass push-button. There are three ways to configure the bypass push-button (see Table 17 for further information):

NONE BYPASS_UNOCCUPIED BYPASS_ONLY

Override Priority

The FCU Controller can be configured to arbitrate overrides coming from the bypass push-button and the L

ONWORKS

network. There are two possible states which have the following meanings:

LAST_WINS specifies that the last command received

from either the wall module or DestManOcc determines the effective override state.

NETWORK_WINS specifies that when DestManOcc is not

OC_NUL, then the effective occupancy mode is determined by DestManOcc regardless of the wall module override state.

LED/LCD

LED Override

The wall module’s LED indicates that the FCU controller is being overridden by either the bypass button or the

ONWORKS network.

• LED ON "override bypass"

2,4

7 EN0B-0377GE51 R0703

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

• One flash per second "override unoccupied"

• Two flashes per second "override standby" or

"occupied"

• LED OFF no override

• Four flashes per second The controller is responding

ONWORKS network management wink command.

to a L

LED Occupancy

The wall module’s LED indicates the effective occupancy mode.

• 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

ONWORKS network management wink command.

to a L

LCD Display

This mode is used only for T7560 Wall Modules. The occupancy mode is represented by the following symbols:

effective "occupied" or effective "bypass"

effective "standby"

effective "unoccupied"

Controller is OFF

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.

Energy-Saving Features

The "Standby" Mode

The digital input for reading input from an occupancy sensor (usually a motion detector) provides the FCU controller 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 FCU controller, an occupancy sensor from another node may be bound to the network input DestOccSensor. The FCU controller can also be forced into the "standby" mode by means of a L command (DestManOcc set to OC_STANDBY). When in the "standby" mode, the FCU Controller uses the "standby" setpoints configured for the heating and the cooling modes (SptHeatStby or SptCoolStby).

ONWORKS network

used by binding it to DestWindow. Frost protection remains active. Normal temperature control resumes when the window closes.

Demand Limit Control

When a high-electrical-demand signal is received from an energy management system via the L

ONWORKS network

(DestDlcShed), the FCU controller uses DlcStptBump to shift the current setpoint (down for heating and up for cooling) by the configured value to save energy.

Fig. 4. Optimum start (heating)

Optimum Start Gradients

There are two parameters, RecRampCool and RecRampHeat, that 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 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.

Fig. 5. Optimum start (cooling)

Window Sensor

The digital input for reading input from a window contact provides the 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 FCU controller, the sensor from another node may be

EN0B-0377GE51 R0703 8

Occupancy Status

The occupancy status is determined based upon Table 3. Manual override may come from the network input DestManOcc or from the bypass push-button.

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 3. Effective Occupancy Mode Arbitration

scheduled occupancy mode occupancy sensor status manual override status effective operating mode

"occupied" room occupied not assigned OC_OCCUPIED "occupied" room not occupied not assigned OC_STANDBY X X "occupied" OC_OCCUPIED X X "unoccupied" OC_UNOCCUPIED X X "standby" OC_STANDBY "occupied" X "standby" OC_OCCUPIED "standby" X not assigned OC_STANDBY "standby" X "standby" OC_OCCUPIED "unoccupied" X not assigned OC_UNOCCUPIED "unoccupied" X "standby" OC_BYPASS X=Don't care

Safety Features

Frost Protection

If the room temperature falls below 46.4°F (8°C), the 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.

Smoke Control

The FCU controller will respond to L 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

ONWORKS network

Fan Failure Protection

When configured with an airflow detector, the FCU controller protects equipment by switching OFF heating / cooling outputs and issuing an alarm when the fan fails.

Fan Interlocks

The 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.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

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 controller to switch to this mode

operational modes (user address: SrcFcuModeS)

START-UP AND WAIT

FLOATING OUTPUTS SYNCH

COOLING The FCU controller is controlling in

HEATING The FCU controller is controlling in

MANUAL MODE The control algorithms stay active

FACTORY TEST Control algorithm is disabled; a

DISABLED Control algorithms are terminated,

PRESSURIZE Heating/cooling outputs are switched

DEPRESSURIZE Heating, cooling and fan outputs are

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.

The FCU controller drives the floating control valves to their initial positions and then transitions to one of the control modes.

the cooling mode.

the heating mode.

and outputs are controlled automatically until set individually to test positions using the network input nviTest.

special factory test program runs.

outputs are turned OFF (turn-OFF sequences and interlocks are active). Frost protection is disabled.

OFF, and the fan is switched ON at its highest speed.

switched OFF.

This is the first mode after an application restart.

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 FCU controller transitions to this mode.

Input NV (DestHvacMode) has a value of HVAC_COOL or HVAC_AUTO and the space temperature is above the cooling setpoint.

Input NV (DestHvacMode) has the value of HVAC_HEAT or HVAC_AUTO and the space temperature is below the heating setpoint.

Input NV (DestManMode) has value of MODE_MANUAL.

This mode is for factory testing, only.

Input NV (DestManMode) has a value of MODE_DISABLED.

Input NV (DestEmerg) containing smoke control signal from C-

Bus has the value of EMERG_PRESSURIZE.

Input NV (DestEmerg) containing smoke control signal from C-

Bus has the value of EMERG_DEPRESSURIZE.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Agency Listings

Table 5 provides information on agency listings for Excel 10 FCU Controller products.

Table 5. Agency listings

device agency comments W7752D to J FCU Controller

W7752D to J FCU Controller W7752D to G FCU Controller W7752D to G FCU Controller

W7754K FCU Controller ??? ??? W7754L FCU Controller ??? ??? W7754M FCU Controller ??? ??? W7754N FCU Controller ??? ??? W7754P FCU Controller ??? ???

CE General Immunity per European Consortium standards EN50081-1 (CISPR 22

Class B) and EN 50082-1:1992 (based on Residential, Commercial, and Light Industrial). EN 61000-4-2 IEC 1000-4-2 (IEC 801-2) Electromagnetic Discharge. EN 50140, EN 50204 IEC 1000-4-3 (IEC 801-3) Radiated Electromagnetic Field. EN 61000-4-4 IEC 1000-4-4 (IEC 801-4) Electrical Fast Transient (Burst).

Radiated Emissions and Conducted Emissions. EN 55022:1987 Class B. CISPR-22: 1985.

FCC Complies with requirements in FCC Part 15 rules for a Class B Computing

Device.

UL Tested and listed under UL 916 (file number E87744).

Ambient Temperature Rating: 32...122 °F (0...50 °C).

cUL Tested and listed under UL 916 (file number E87744).

Ambient Temperature Rating: 32...122 °F (0...50 °C).

Construction

Excel 10 W7752 FCU Controllers

The Excel 10 W7752 FCU Controller is available in five basic models, each with two different possibilities for L 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 6 shows the differences between models.

Table 6. Excel 10 W7752 FCU Controller models

OS number Power input Reheat relay

W7752D2007 230 Vac X

W7752E2004 230 Vac W7752F2002 115 Vac X

W7752G2000 115 Vac

W7752J2003 100 Vac

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.

ONWORKS

Excel 10 W7754 FCU Controllers

The Excel 10 W7754 FCU Controller is available in five basic models, each with two different possibilities for L transceivers. Table 7 shows the differences between models.

Table 7. Excel 10 W7754 FCU Controller models

OS number Power input Reheat relay

W7754K1001 230 Vac X W7754L1009 24 Vac

W7754M1007 230 Vac

W7754N1004 230 Vac W7754P1000 230 Vac

ONWORKS

CAUTION

If 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. 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.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Fig. 6. W7752 construction in inches (mm)

WALL MOD.

+ -

RS1A

59.5180

ONUNUSED

UNUSED DI2

USED

GND9LED10FAN11DI2

321 4 5 6 23247

DI1

SET

5342 1

T7460 / T7560

SENS

23D25

LON

GND

0345

230 V

W7754Kxxxx

230 Vac, 50/60 Hz max. 5 VA unloaded

1314 15 181716

L N

2 A10A

III II I

Honeywell

D-71101 Schönaich Made in Germany

triac

0.5 A

1920 2122

fan

OUT1 OUT2

230 Vac

2526

2A/M

com

open

230 V

Fig. 7. "7754 dimensions (in mm)

130

110

terminal protection

cover (optional)

EN0B-0377GE51 R0703 12

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Controller Performance Specifications

Power: 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

24 Vac ±20%, 50/60 Hz.

Operating Temperature:

32...122°F (0...50°C).

Shipping/Storage Temperature:

-40...+158°F (-40...+70°C).

Relative Humidity:

5% to 95% non-condensing

Inputs:

Temperature Sensor:

20k ohm NTC

Setpoint Potentiometer:

10k ohm

Digital Input:

Closed ≤ 400 ohms Open ≥ 10 K ohms

Outputs:

Triac voltage range:

24 Vac ± 20%.

Triac max. current ratings:

250 mA continuous 650 mA surge for 30 sec.

IMPORTANT:

When any device is energized by a Triac, the device must be able to sink a minimum of 15 mA. If nonHoneywell motors, actuators, or transducers are to be used with Excel 10 FCU Controllers, compatibility must be verified.

nviSpaceTemp

nv1

SNVT_temp_p

nviSetPoint

nv2

SNVT_temp_p

nviFanSpeedCmd

nv6

SNVT_switch

nviOccCmd

nv7

SNVT_occupancy

nviApplicMode

nv8

SNVT_hvac_mode

nviSetPtOffset

nv9

SNVT_temp_p

nviWaterTemp

nv10

SNVT_temp_p

nviDischAirTemp

nv17

SNVT_temp_p

nviEnergyHoldOff

nv18

SNVT_switch

Hardware Output

Fan Coil Unit Controller Object #8020

nvoHeatOutput

nv3

SNVT_lev_percent

Mandatory Network Variabl es

Optional Network Variabl es

nvoCoolOutput

nv4

SNVT_lev_percent

nvoFanSpeed

nv5

SNVT_switch

nvoTerminalLoad

nv11

SNVT_lev_percent

nvoLoadAbs

nv12

SNVT_power

nvoDischAirTemp

nv13

SNVT_temp_p

nvoReheat

nv14

SNVT_switch

nvoSpaceTemp

nv15

SNVT_temp_p

nvoEffectSetPt

nv16

SNVT_temp_p

nvoEffectOcc

nv19

SNVT_occupancy

nvoEnergyHoldOff

nv20

SNVT_switch

nvoUnitStatus

nv21

SNVT_hvac_status

Configuration Properties

nc49 - nciSndHrtBt SNVT_time_sec mandatory nc52 - nciMinOutTm SNVT_time_sec optional nc48 - nciRcvHrtBt SNVT_time_sec optional nc17 - nciLocation SNVT_str_asc optional nc60 - nciSetPnts nc59 - nciNumValve

SNVT_temp_setpt SNVT_count

mandatory optional

Fan relays voltage range:

20 to 253 Vac

Fan relays max. current rating:

3 A

Electric reheat relay voltage range:

20 to 253 Vac

Electric reheat relay max. current rating:

10 A 6 A (UL916)

Interoperability

The W7752 Controllers use the LonTalk protocol. They support the L

ONMARK Functional Profile # 8020 “Fan Coil Unit

Controller”, version 2.0. Fig. 8 shows the implementation used.

nviSensorOcc SNVT_Occupancy

Manufacturer

Defined

nvoSensorOcc SNVT_occupancy

Section

nviEmerg SNVT_hvac_emerg

nviReheatRelay SNVT_switch

nvoDigitInState SNVT_switch

Hardware

Input

NOT SUPPORTED.

Fig. 8. LONMARK FCU object profile

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Configurations

General

The following sections provide an overview of the Excel 10 FCU Controller options related to inputs and outputs. See section "Step 6. Configure Controllers" (page 28) for a complete list of configuration options and defaults.

Table 8. Hardware options summary

option possible configurations

fan type no fan

fan interlock enabled

FCU system type two-pipe

output 1 actuator type floating

output 2 actuator type floating

valve direction direct

reheat none

digital input not used

wall module option local

temperature sensor type

NOTE:

The floating-mid option is only for changeover applications and uses only one of the two outputs.

one-speed two-speed three-speed

disabled

four-pipe

floating mid (one for heat/cool) one-stage two-stage three-stage PWM thermal

reverse

reheat (W7752D and F only) free use (W7752D and F only)

W7754?

window closed occupied sensor air flow detector cool changeover window open unoccupied sensor no air flow heat changeover movement no movement

shared

none NTC non-linearized

Fan Type

Each fan coil unit controlled by an FCU controller can have a fan with up to three different speeds or no fan at all. Multispeed 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 multistaged system. Conversely, a multi-speed fan may follow multiple switching levels even for single-staged, floating, PWM, or thermal actuator-based systems.

Hysteresis

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. Min. ON and OFF times can be configured and will apply to all fan switching points.

Interlock

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.

The fan can be configured to run continuously during the zero energy band during occupied periods.

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Fig. 9. Three-speed fan switching and hysteresis, cooling mode (defaults for switching levels shown)

Type of Heating and Cooling Equipment

The FCU controller can operate with either two-pipe or fourpipe systems. A two-pipe system requires a changeover input to the controller (hardware or network input).

The FCU controller can operate with a variety of actuators for heating and cooling equipment. Floating actuators can be used which will require specifying the valve run time during configuration of the controller. 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.

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.

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.

Fig. 10. Three-stage heating/cooling switching (defaults for switching levels and hysteresis shown)

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Reheat Output

W7752D and F Controllers have an additional high-current of 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 W7752 must be configured to specify that the output is under the control of the L control algorithm.

Fig. 11. Reheat switching and hysteresis (defaults

ONWORKS network, and not of the FCU

shown)

Digital Input

There is a single digital input in the W7752 Controller 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 normallyclosed contacts for any of the switches.

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 sensor contact is closed, the effective occupancy mode will be "occupied". However, if the TOD schedule indicates an occupied state and 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 L 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).

The input may also be configured for changeover for a twopipe system.

NOTE: The Excel 10 FCU Controller has limited power

available (only 1.5 mA/4.8 V) for checking the digital input for contact closures. Ensure that contacts used remain within the specified resistance tolerance range (closed ≤ 400 ohms) even when aged.

ONWORKS network

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

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).

The FCU controller 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.

Common Temperature Control (Master/Slave Controllers)

When one or more 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 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 L

ONWORKS network command

mode status and communicates this to the slave via the

ONWORKS network.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Abbreviations and Definitions

CARE Computer Aided Regulation Engineering;

C-Bus Honeywell proprietary Control Bus for

CPU Central Processing Unit; an EXCEL 5000

Echelon

EMS Energy Management System; refers to the

EEPROM Electrically Erasable Programmable Read

EPROM Erasable Programmable Read Only

E-Vision PC-based tool used for configuration and

Excel 10 Zone Manager - A controller that is used to

Firmware Software stored in a nonvolatile memory

the PC based tool used to configure C-Bus- Bus devices.

communications between EXCEL 5000 System controllers and components.

System controller module.

The company that developed the

ONWORKS

network and the Neuron

chips used to communicate on it.

EMI Electromagnetic Interference; electrical

noise that can cause problems with communications signals.

controllers and algorithms responsible for calculating optimum operational parameters for max. energy savings in the building.

Only Memory; the variable storage area for saving user setpoint values and factory calibration information.

Memory; the firmware that contains the control algorithms for the Excel 10 FCU Controller.

commissioning of Excel 10 devices.

interface between the C-Bus and the

ONWORKS network. The Excel 10 Zone

Manager also has the functionality of an Excel 100 Controller, but has no physical I/O points. (Note: The Q7750A Zone Manager may be referred to as E-Link.)

medium such as an EPROM.

I/O Input/Output; the physical sensors and

actuators connected to a controller.

I x R I times R or current times resistance; refers

to Ohms Law: V = I x R.

K Kelvin.

LiveCARE The PC based tool used to monitor and

ONWORKS Echelon® LONWORKS® network for

change parameters in C-Bus devices.

communication among Excel 10 FCU controllers.

NEC National Electrical Code; the body of

standards for safe field-wiring practices.

NEMA National Electrical Manufacturers

Association; the standards developed by an organization of companies for safe field wiring practices.

NV Network Variable; an Excel 10 FCU

controller parameter that can be viewed or modified over the L

ONWORKS network.

OEM Original Equipment Manufacturer; the

company that builds the fan coil units.

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.

segment A L

ONWORKS section containing no more

than 60 Excel 10s. Two segments can be joined together using a router.

Subnet An L

ONWORKS segment that is separated

by a router from its Q7750A Zone Manager.

TOD Time-Of-Day; the scheduling of Occupied

and Unoccupied times of operation.

VA Volt Amperes; a measure of electrical

power output or consumption as applicable to an ac device.

Vac Voltage alternating current; ac voltage as

opposed to dc voltage.

XBS Excel Building Supervisor; a PC based tool

for monitoring and changing parameters in

C-Bus devices.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

APPLICATION STEPS

Overview

Steps one through seven, see Table 9, address considerations for engineering an Excel 10 FCU System. These steps are guidelines intended to aid understanding of the product I/O options, bus arrangement choices, configuration options and the Excel 10 FCU Controllers’ role in the overall EXCEL 5000

Step No. Description

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.

When planning the system layout, consider potential expansion possibilities to allow for future growth. Planning is very important to be prepared for adding HVAC systems and controllers in future projects.

System architecture.

Table 9. Application steps

1 Plan the System 2 Determine Other Bus Devices Required 3 Lay out Communication and Power Wiring 4 Prepare Wiring Diagrams 5 Order Equipment 6 Configure Controllers 7 Troubleshooting

notebook PC

using E-Vision

shielded interface

cable

Excel 10

FCU

RS-232

serial

port

SLTA

controller

LonWorks

port

The L

ONWORKS 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 20) for more information on bus wiring layout, and see Fig. 13, Fig. 14, and Fig. 15 in section "Step 4. Prepare Wiring Diagrams" (page 22) for wiring details.

It is important to understand the interrelationships between

FCU controllers on the L

ONWORKS network early in the job

engineering process to ensure their implementation when configuring the controllers. (See section "Step 6. Configure Controllers" [page 28] for information on the various Excel 10 FCU Controller parameters and on Excel 10 FCU Controller point mapping.)

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

ONWORKS segments. The router accounts for two of these

nodes (one node on each side of the router); a Q7750A Excel 10 Zone Manager can take one node and two slots are available for operator terminal nodes, leaving 120 nodes available for Excel 10 FCU Controllers. All 120 controllers are able to communicate through the router. A Q7750A Excel 10 Zone Manager is required to connect the L to the standard EXCEL 5000 System C-Bus. Each Excel 10 Zone Manager can support no more than 120 W7752s. This is a limit set in the Excel 10 Zone Manager database and is an absolute maximum.

ONWORKS segment is set up with two unused nodes to

Each L allow for an E-Vision operator terminal to be connected to the

ONWORKS network. Multiple E-Vision terminals can be

connected to the bus at the same time. Table 10 summarizes

ONWORKS segment configuration rules.

the L

ONWORKS network

Fig. 12. Connecting the portable operator terminal to the

ONWORKS network

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 10. LonWorks configuration rules and device node numbers

One L

ONWORKS Segment Example max. number of nodes equals 62

one Q7750A Excel 10 Zone Manager 1 node

port for operator terminal access (E-Vision) 1 node

max. number of Excel 10 Controllers 60 nodes (wall modules are not LONWORKS nodes)

Total 62 nodes

Two LONWORKS Segments Example max. number of nodes equals 125

one Q7750A Excel 10 Zone Manager 1 node

one Q7751A Router 2 nodes (1 in each Bus Segment)

ports for operator terminal access (two E-Vision terminals) 2 nodes (1 in each Bus Segment)

max. number of Excel 10 Controllers in segment number one 60 nodes (wall modules are not LONWORKS nodes)

max. number of Excel 10 Controllers in segment number two 60 nodes (wall modules are not LONWORKS nodes)

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.

NOTE: In the case of FTT L

ONWORKS segments, the

distance from each transceiver to all other transceivers 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.

If longer runs are required, add a Q7751A Router to partition the system into two segments. It is not legal to use more than one router per Excel 10 Zone Manager.

In addition, all L a Bus Termination Module. For an FTT L

ONWORKS segments require the installation of

ONWORKS 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 20) and the

ONWORKS Termination Module subsection in section "Step

4. Prepare Wiring Diagrams" (page 22) for more details.

Step 3. Lay Out Communications and Power Wiring

LONWORKS Layout

The communications bus, LONWORKS, is a 78-kilobit serial link that uses transformer isolation and differential Manchester encoding. Wire the L AWG or plenum rated level IV 22 AWG non-shielded, twisted pair, solid conductor wire as the recommended wire size (see Table 11 for part numbers). An FTT L in daisy chain, star, loop or any combination thereof as long as the max. wire length requirements given in Step 2 are met.

NOTE: Due to the transformer isolation, the bus wiring does

not have a polarity; that is, it is not important which of the two L

ONWORKS terminals are connected to

each wire of the twisted pair.

LONWORKS networks can be configured in a variety of ways,

but the rules listed in Table 10 always apply. Fig. 13 and Fig. 14 depict two typical daisy chain L 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 using 2000-series devices. The bus configuration is set up using the Network Manager tool from within E-Vision (see the E-Vision User Guide).

ONWORKS using level IV 22

ONWORKS can be wired

ONWORKS network layouts;

Note: C7750A Zone Manager has internal termination module (with jumpers installed as shown).

Fig. 13. LONWORKS wiring layout for one daisy-chain network segment

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Fig. 14. LONWORKS wiring layout for two daisy-chain network segments

Fig. 15. Free topology LONWORKS layout examples

NOTE: See section "L

ONWORKS Termination" on page 25

for additional details.

IMPORTANT

Notes on Communications Wiring:

• All field wiring must conform to local codes and ordinances.

• Do not use different wire types or gauges on the

ONWORKS segment. The step change in

same L line impedance characteristics would cause unpredictable reflections on the L

ONWORKS net-

work. When using different types is unavoidable, use a Q7751A Router at the junction.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

• 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 L

• Make sure that neither of the L grounded.

Power Wiring

IMPORTANT

Notes on Power Wiring:

• All field wiring must conform to local codes and

ordinances.

• Use the heaviest gauge wire available, up to

14 AWG (2.0 mm (1.0 mm connections.

• To minimize EMI noise, do not run Triac and/or

relay output wires in the same conduit as the input wires or the L loop.

ONWORKS cable.

ONWORKS wires is

) for all power and earth ground

) with a minimum of 18 AWG

ONWORKS communications

• 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.

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. Wiring details for the W7752 FCU Controller are shown in Fig. 17. Table 12 gives additional details for output connections.

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. See Fig.

16.

Table 11 lists wiring types, sizes, and length restrictions for Excel 10 FCU Controller products.

Table 11. Field wiring reference table (US part numbers shown)

wire

function

LONWORKS

(plenum)

LONWORKS

(nonplenum)*

input wiring, sensors, contacts

output wiring, actuators, relays

power wiring

recommended

min. wire size

AWG (mm

)

22 AWG

14 to 20 AWG

(2.0 to 0.5 mm

14 AWG (2.5 mm

(18 AWG (1.0

) acceptable

for short runs)

14 AWG

(2.5 mm

)

construction

twisted pair solid

conductor, non-shielded.

twisted pair solid

conductor, non-shielded.

multi-conductor (usually

five-wire cable bundle); for

runs >100 ft (30 m),

)

twisted pair or shielded cable is recommended.

)

any pair non-shielded (use

heavier wire for longer

runs).

any pair non-shielded (use

heavier wire for longer

runs).

specification

requirement

Level IV 140°F

(60°C) rating

Level IV 140°F

(60°C) rating

140°F (60°C)

rating

NEC Class 2 140°F (60°C)

rating

NEC Class 2 140°F (60°C)

rating

NOTE: PVC wire must not be used where prohibited by local fire regulations.

vendor wire type max. length ft (m)

Honeywell (US)

AK3791 (one twisted pair)

AK3792 (two twisted pairs)

See Step 2

(Europe: Belden

9H2201504)

Honeywell (US)

AK3781 (one twisted pair)

AK3782 (two twisted pairs)

See Step 2

(Europe: Belden

9D220150)

Standard thermostat wire 82.5 ft (25 m)

Honeywell (US) AK3702 (18 AWG) AK3712 (16 AWG)

200 ft (60 m)

AK3754 (14 AWG)

or equivalent

Honeywell (US) AK3754 (14 AWG)

(twisted pair)

AK3909 (14 AWG) single

conductor or equivalent

Limited by line loss

effects on power

consumption.

(See Line Loss

subsection.)

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Terminal Block Assignment and Wiring Example for the W7752 Controller

Fig. 17 illustrates terminal block assignments and wiring for an example Excel 10 W7752 FCU Controller installation. All

connections are made at terminal blocks. Table 12 lists wiring information for wiring all of the possible actuator types.

REHEAT

1. STRIP 1/2 IN. (13 MM) FROM WIRES TO BE ATTACHED AT ONE TERMAINAL

Fig. 16. Attaching two or more wires at terminal blocks

OCCUPANCY SENSOR

CHANGEOVER CONTACT

AIRFLOW CONTACT

WINDOW CONTACT

MOTION SENSOR

WALL MODULE CONNECTIONS

HEAT

COM

COOL

FAN

MED HI

RETURN

OPEN CLOSE

POWER MAINS

2. TWIST WIRES TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS).

LONW

ORKS

NETWORK IN

ONWORKS

COM

OPEN CLOSE

NETWORK OUT

3. CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM) BEFORE INSERTING INTO T ERMINAL AND TIGHTENI NG SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION.

W7752 FAN COIL UNIT CONTROLLER

0.5A

16A

2 3

LED SETPOINT

FAN / BYPASS

TEMP SENSOR

AGND

7 8

E-BUS IN

E-BUS OUT

E-BUS OUT OUT 1 COM

OUT 1 OPEN

OUT 1 CLOSE

15 16

OUT 2 COM OUT 2 OPEN

OUT 2 CLOSE

RELAY COM

RELAY 1

RELAY 2

RELAY 3

SUPPLY VOLT

SUPPLY VOLT PWR RELAY IN (D,F MODELS ONLY)

25 26

PWR RELAY OUT (D,F MODELS ONLY)

Fig. 17. W7752 FCU Controller wiring example

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 12. Output assignments for various actuator types

Output type

13 14 15 16 17 18

Out 1 Terminal Out 2 Terminal

Floating 24 Vac open close 24 Vac open close 1-stage 24 Vac on/OFF — 24 Vac on/OFF — 2-stage 24 Vac stage 1 stage 2 24 Vac stage 1 stage 2

3-stage

24 Vac stage 1 stage 2 24 Vac stage 1 stage 2

stage 3 stage 3 PWM 24 Vac PWM — 24 Vac PWM — Thermal 24 Vac on/OFF — 24 Vac on/OFF —

Terminal Block Assignment and Wiring for the W7754 Controller

Table 13 lists the terminals and their functions of the Excel 10 W7754 FCU Controller. In addition to connections made at terminal blocks, there is an extra socket located to the left of the terminal blocks containing a digital output for the low-voltage PWM control of a solid-state relay employed in high-current electric reheat applications. Table 13 lists wiring information for wiring all of the possible actuator types.

Table 13. W7754 Controller, terminals and functions

term. # function

1 receiving/sending data on the LONWORKS network 2 receiving/sending data on the LONWORKS network 3 a digital input, configurable (using the LNS plug-in) to read input e.g. from a window contact, an occupancy sensor,

4 an analog input, permanently configured to read input from a wall module's temperature setpoint adjustment knob 5 an analog input, permanently configured to read input from a room temperature sensor. 6GND 7 not present 8GND 9 a digital output, permanently configured to write output switching the wall module's LED "on" or "OFF" 10 an analog input, permanently configured to read input on whether the wall module's 3-speed fan control knob has

11 12 not present 13+14 relay 4, permanently configured to switch a hardwired electrical reheat coil ON or OFF 15 common terminal for terminals 16, 17, and 18 16 17 18 19 a triac output, permanently configured to write output to OUT1, closing it 20 a triac output, permanently configured to write output to OUT1, opening it 21 a triac output, permanently configured to write output to OUT2, closing it 22 a triac output, permanently configured to write output to OUT2, opening it 23 a common terminal for terminals 19 and 20 24 a common terminal for terminals 21 and 22 25 the "N" terminal of the power supply 26 the "L" terminal of the power supply

(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, then the three-speed fan is switched OFF.

etc.

been set to AUTO, OFF, LOW, MEDIUM, or HIGH and whether the wall module's "occupancy override" button has been pressed.

(1)

a digital input, permanently configured to read input on whether a window contact is "open" or "closed".

(2)

relay 3, permanently configured to write output to a three-speed fan, setting it to HIGH

(2)

relay 2, permanently configured to write output to a three-speed fan, setting it to MEDIUM

(2)

relay 1, permanently configured to write output to a three-speed fan, setting it to LOW

The triac outputs or relay outputs of the Excel 10 W7754 FCU Controller can be configured (using Honeywell's LNS plug-in) for different functions.

You can configure the four triac outputs 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 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 14. Output assignments of Excel 10 W7754 FCU Controller for various actuator types

output type stage

19 20 21 22

floating -- close open close open

1-stage

0--OFF--OFF 1--ON--ON 0 OFF OFF OFF OFF 1 OFF ON OFF ON2-stage 2 ON OFF ON OFF 0 OFF OFF OFF OFF

3-stage

1 OFF ON OFF ON 2 ON OFF ON OFF

3 ONONONON PWM -- -- PWM -- PW M thermal -- -- ON/OFF -- ON/OFF

OUT1 OUT2

LONWORKS Termination

One or two LONWORKS terminations are required, depending on the given LonWorks bus layout.

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

ONWORKS layout. See Fig. 19 for connection details for a

doubly terminated bus. See Fig. 20 for connection details for a singly terminated bus.

Two different L

ONWORKS termination module, order no.: 209541B

• L

ONWORKS connection / termination module (mountable

• L

on DIN rails and in fuse boxes), order no.: XAL-Term

removable screw-type

3-pole terminal block

ONWORKS termination modules are available:

shield shield

plug-in jumper

LON

Term in at io n

FTT/LPT Bus FTT/LPT Free Park Position

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.

Fig. 19. Termination Module connections for a doubly-

terminated FTT network

Fig. 20. Termination Module connections for a singly-

terminated FTT network

Fig. 18. LONWORKS connection and termination module

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

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 Comments

Excel 10 FCU Controllers

W7752D2007

W7752E2004

W7752F2002

W7752G2000

W7752J2003

230 Vac, FTT L reheat 230 Vac, FTT L reheat 115 Vac, FTT L reheat 115 Vac, FTT L reheat 100 Vac, FTT L reheat

W7754K1001 230 Vac

W7754L1009 24 Vac W7754M1007 230 Vac W7754N1004 230 Vac W7754P1000 230 Vac

T7460 T7560

C7068A1007 (Europe) Air Temperature Sensor Return air

Echelon-Based Components and Parts

Q7751A2002 (US)

(UK)

ONWORKS router Order from local Echelon supplier (Europe)

FTT L

(Europe)

Q7752A2001 (US)

(UK)

ONWORKS Serial Interface (SLTA) Order from local Echelon supplier (Europe)

FTT L

(Europe)

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.

Excel 10 Zone Manager

Q7750A2003 FTT LONWORKS Zone Manager C-Bus to LONWORKS interface

XD 505A

XD 508

—

9600 baud C-Bus Communications Submodule (1 Megabit baud rate) C-Bus Communications Submodule

Serial Interface Cable, male DB-9 to female DB-9 or female DB-25.

Honeywell (US)

AK3791 (one twisted pair)

AK3792 (two twisted pairs)

Belden (Europe)

ONWORKS (plenum): 22 AW G twisted pair

solid conductor, non-shielded.

9H2201504

Honeywell (US)

AK3781 (one twisted pair)

AK3782 (two twisted pairs)

Belden (Europe)

ONWORKS (non-plenum): 22 AW G twisted

pair solid conductor, non-shielded.

9D220150

Honeywell (US) AK3725

Honeywell (US) AK3752

(typical or equivalent)

Honeywell (US) AK3702

(typical or equivalent)

Honeywell (US) AK3712

(typical or equivalent)

Inputs: 18 AWG (1.0 mm bundle. Outputs/Power: 14 to 18 AWG (2.5 to

1.0 mm

18 AWG (1.0 mm

16 AWG (1.5 mm

ONWORKS version with

ONWORKS version without

ONWORKS version with

ONWORKS version without

Excel 10 Wall Modules

Excel 10 Sensors

Cabling

) five wire cable

) twisted pair. Non-plenum

See Excel 10 wall module literature for details.

—

Obtain locally from any computer hardware vendor.

Level IV 140°F (60°C) rating

Standard thermostat wire

NEC Class 2 140°F (60°C) rating

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Part Number Product Description Comments

Honeywell (US) AK3754

(typical or equivalent)

14 AWG (2.5 mm

) two conductor. Non-plenum

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Step 6. Configure Controllers

General

The process of configuring Excel 10 FCU Controllers is the same for all models. In all cases, the process involves giving

the Excel 10 FCU Controller information using the E-Vision PC tool. Details on the use of E-Vision are found in the EVision User Guide. The E-Vision User Guide provides detailed steps for defining the Excel 10 Zone Manager (if required); creating or starting an existing E-Vision project; creating or selecting an existing network; building or modifying the network; defining and copying controllers; mapping points between controllers, the Zone Manager, and thirdparty devices; connecting to controllers for commissioning, monitoring and uploading; and various other functions. This section will provide details on the configuration options found in E-Vision for W7752 and W7754 FCU Controllers. If another L see Appendix C for reference information.

Using E-Vision

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

ONWORKS communication tool is used for set-up,

included in this section. There are 9 file tabs:

1. Output

2. Input

3. Equipment Control

4. Fan

5. Switching Levels

6. Zone Options

7. Miscellaneous

8. PID

9. W iring (information only, no configuring).

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 User Addresses, see Appendix C.

The configuration of the setpoints as either absolute or relative is performed in E-Vision in the Project Defaults screen.

NOTE: To set the following configuration parameters, use

the E-Vision PC tool. These sections describe the various parameters and the allowable settings. For details on using E-Vision, refer to the E-Vision User Guide.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Output

The available options for output configurations with the default values shown are listed in Table 16. See section "Configurations" (page 14) above for more information about parameters.

Table 16. FCU Controller output configuration options

function configuration options default

FCU controller type

System type

Fan type

Relay 4 (reheat relay)

Output1 (triac 1 and 2) control

Output 1 (triac 1 and 2) type

Output 2 (triac 3 and 4) control

Output 2 (triac 3 and 4) type

Notes:

1. The output mode settings only apply to a 4-pipe system. In a 2-pipe system output 1 will always operate in changeover mode.

2. The floating-mid option is only for changeover applications and uses only one of the two outputs.

3. The operation of the triacs based upon the output type is given in Table 12.

W7752D,F (with reheat relay) W7752E,G,J (without reheat relay)

W7754

two pipe (1 valve) four pipe (2 valves)

no fan 1-speed fan 2-speed fan 3-speed fan

FCU controller control algorithm (reheat) network control (free use) relay not used

not used cooling

heating heat/cool changeover

floating floating-mid

1-stage 2-stage 3-stage PWM thermal

not used cooling

heating heat/cool changeover

floating floating-mid

1-stage 2-stage 3-stage PWM thermal

W7752D,F

four-pipe

3-speed fan

W7752D,F: reheat W7752E,G,J: relay not

used

W7754

heating

floating

cooling

floating

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Input

The available options for input configurations with the default values shown are listed in Table 17. See Control Provided and Configurations sections above for more information on parameters.

Table 17. FCU Controller input configuration options

function configuration options default

space temperature sensor

bypass button

LED/LCD

fan speed switch (or respective T7560 setting)

setpoint knob

min. limit setpoint pot

max. limit septoint pot

digital input

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).

no 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 - 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.

LCD display - only used with T7560 Wall Modules; occupancy mode is represented by different symbols.

no switch 3-position switch 4-position switch 5-position switch

no knob relative absolute middle

limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86°F) or DDF (relative setpoint, -9 to 9 DDF)

(limit for setpoint knob in either degrees C (absolute setpoint, 12 to 30°C) or K (relative setpoint, -5 to 5 K))

limit for setpoint knob in either degrees F (absolute setpoint, 53.6 to 86°F) or DDF (relative setpoint, -9 to 9 DDF)

(limit for setpoint knob in either degrees C (absolute setpoint, 12 to 30°C) or K (relative setpoint, -5 to 5 K))

not used window closed occupied sensor cool changeover window open unoccupied sensor heat changeover movement no movement

sensor

bypass unoccupied

LED override

5-position switch

relative

-9 DDF (53.6°F for absolute setpoint)

(-5 K (12°C for absolute setpoint))

9 DDF (86°F for absolute setpoint)

(5 K (30°C for absolute setpoint))

not used

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Equipment Control

The available options for equipment control configurations with the default values shown are listed in the following table. See Control Provided and Configurations sections above for more information on parameters.

Table 18. FCU Controller equipment control configuration options

function configuration options default

output 1 fan interlock enabled / disabled disabled

output 2 fan interlock enabled / disabled disabled

output 1 valve direction

output 2 valve direction

output 1 min. stage OFF time 0 to 600 seconds 90 s

output 2 min. stage OFF time 0 to 600 seconds 90 s

output 1 valve run time/PWM period/min. stage ON time

output 2 valve run time/PWM period/min. stage ON time

reheat switching level 0 to 100% 100%

reheat hysteresis 0 to 100% 5%

PWM zero position

PWM full position

Notes:

1. Valve action settings apply to floating, PWM, or thermal types.

2. Settings apply to both actuators if both are PWM.

direct / reverse direct

floating - valve run time (20 to 600 seconds) PWM - cycle time (20 to 600 seconds)

150 s

1, 2, and 3-stage – min. ON time (0 to 1200 seconds)

floating - valve run time (20 to 600 seconds) PWM - cycle time (20 to 600 seconds)

150 s

1, 2, and 3-stage – min. ON time (0 to 1200 seconds)

0 to 100% 0%

0 to 100% 100%

Fan

Available options for fan control are listed in the following table. See Control Provided and Configurations sections above for more information about parameters.

Table 19. FCU controller fan configuration options

function configuration options fefault

fan occupancy mode

fan min. ON time

fan min. OFF time

fan run-up time

fan overrun time

Notes:

1. Fan run time options apply to all fan speeds.

continuous during occupied mode; automatic, based on control algorithm

0 to 1200 seconds 0

(with fan interlock only) 0 to 600 seconds 0

automatic

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Switching Levels

See Configurations section above for more information about parameters.

Table 20. FCU Controller switching levels configuration options

function configuration options default

cooling stage 1 switching level 0 to 100% 5%

heating stage 1 switching level 0 to 100% 5%

cooling stage 2 switching level 0 to 100% 50%

heating stage 2 switching level 0 to 100% 50%

cooling stage 3 switching level 0 to 100% 75%

heating stage 3 switching level 0 to 100% 75%

cooling hysteresis 0 to 100%, 10%

heating hysteresis 0 to 100% 10%

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 Control Provided and Configurations sections above for more information on parameters.

Table 21. FCU Controller zone configuration options

function configuration options default

cooling occupied setpoint 50 to 95°F (10 to 35°C) 73.4°F (23°C)

heating occupied setpoint 50 to 95°F (10 to 35°C) 69.8°F (21°C)

cooling standby setpoint 50 to 95°F (10 to 35°C) 77°F (25°C)

heating standby setpoint 50 to 95°F (10 to 35°C) 66.2°F (19°C)

cooling unoccupied setpoint 50 to 95°F (10 to 35°C) 82.4°F (28°C)

heating unoccupied setpoint 50 to 95°F (10 to 35°C) 60.8°F (16°C)

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 in E-Vision are listed in the following table. See Configurations section above 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

Override priority

Demand limit control bump 0 to 18 DDF (0 to 10 K) 3.6 DDF (2 K)

Cool rec ramp (cooling optimum start gradient)

Heat rec ramp (heating optimum start gradient)

network has priority.

network wins - a network command always has priority until canceled.

-36 DDF/hour to 0 (-20 K/hour to 0) 0

0 to 36 DDF/hour (0 to 20 K/hour) 0

last wins

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

PID

The options for configuring PID parameters with defaults are shown in the following table. See Control Provided section above for more information about parameters.

Table 23. FCU Controller PID configuration options

function configuration options default

cooling proportional gain

heating proportional gain

cooling reset time 10 to 3200 seconds (0 = disable) 250 s

heating reset time 10 to 3200 seconds (0 = disable) 250 s

cooling derivative time 1 to 3200 seconds (0 = disable) 0

heating derivative time 1 to 3200 seconds (0 = disable) 0

cooling boost temperature 0.9 to 18 DDF (0.5 to 10 K) (0 = disable) 1.8 DDF (1 K)

heating boost temperature 0.9 to 18 DDF (0.5 to 10 K) (0 = disable) 1.8 DDF (1 K)

Notes:

1. Prior to version 1.0.3, the minimum proportional gain was 7.2 DDF (4 K) for all control algorithms.

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)

36 DDF (20 K)

Commissioning

Commissioning is the process of writing the LONWORKS addresses, the binding information and the configuration to the Excel 10 Controller. E-Vision is the tool used to perform these activities, as described in Appendix B.

Job Commissioning

The CARE database that is generated for the Excel 10 FCU Controllers and associated Zone Managers contains information concerning interrelationships and network identifications. For this reason, it is mandatory to commission (assign ID and download) all Excel 10 FCU Controllers and the Zone Managers from a single database.

CAUTION

If more than one copy of the same database is used in multiple PCs to assign IDs and download to Excel 10 FCU Controllers, there is currently no means to recombine the multiple copies into a single database for any project. If multiple copies are used, it is necessary to designate one database as the master and recommission the controllers that do not indicate being commissioned. If E-Vision displays an assigned ID only the application needs to be downloaded to the controller. If no ID has been assigned, assign ID(s) and download the application to the controller(s). In both of these cases, parameter changes (Setpoints, Temperature Sensor Calibration, etc.) made with the other PC database are lost and have to be reentered.

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 side of the W7752 housing or on

the adhesive sticker on the top of the W7754 housing and

can be typed in manually. E-Vision is used to perform both methods (see E-Vision User Guide).

Configuring the Zone Manager

The Q7750A Excel 10 Zone Manager sends a one-time

ONWORKS message containing its 48-bit Neuron ID after any

L power-up WARMSTART or when the Excel 10 Zone Manager is reset by pressing the reset button.

IMPORTANT

Pressing the reset button on the Excel 10 Zone Manager causes all application files in the Q7750A, including the C-Bus setup, to be lost.

ONWORKS message is sent only once and only on the

The L

ONWORKS network, not on the B-Port. The message will be

the same as the one generated after pressing the service button, which is available on Excel 10 FCU Controllers via the Excel 10 wall module's bypass push-button. E-Vision uses this message to assign the node address.

The Assign ID procedure is the same as for an Excel 10 FCU Controller except, instead of pressing the bypass button, the reset button must be pressed or the power must be cycled (down then up) on the Q7750A Excel 10 Zone Manager.

Excel 10 FCU Controller Point Mapping

In typical Excel 10 FCU Systems, there are often variables containing values or information that must be shared with devices on the C-Bus. E-Vision is used to perform these operations through the Point Mapping function. Mapped points are available to the C-Bus. Table 24 lists FCU controller source variables for mapping, and Table 25 lists

variables from other sources which may be mapped to FCU controller input variables. See Appendix D for a complete list of all Excel 10 FCU Controller User Addresses.

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 24. Mapping of FCU Controller source points with receivers elsewhere on LONWORKS network or C-Bus

source (Excel 10 FCU controller) variable name

SrcOccEff

SrcOccOvrdHwS

SrcFcuModeS

SrcAlarmNode

SrcReheatS

SrcTermLoad

SrcRmTempSptEffS

NOTE: E-Vision handles the mapping process for C-Bus accessible Excel 10 points. If custom mapping arrangements are

required, see Appendix C for a complete listing of the Excel 10 FCU Controller User Addresses.

description (including receiver information) allowable values typical destination

OC_OCCUPIED This signal contains the effective occupancy status of the Excel 10 FCU Controller.

OC_BYPASS

OC_STANDBY

XBS for monitoring.

OC_UNOCCUPIED

This signal contains the state of the remote override button.

Indicates the current control mode of the Excel 10 FCU Controller.

Indicates latest alarm detected by the node (if any) and return to normal.

If the unit has electric reheat, this indicates the current commanded status.

OC_UNOCCUPIED

OC_BYPASS

OC_NUL (not assigned)

10 possible values. See

Table 4 or Appendix C.

40 possible values. See

Table 26 or Appendix C.

ST_OFF

ST_NUL (no reheat)

XBS for monitoring and tenant logging.

XBS for monitoring.

This indicates the current calculated terminal cooling load as a percentage of what the unit is designed to handle. Positive value indicates a cooling load.

-160 to 160 percent XBS for monitoring.

Negative value indicates a heating load.

This indicates the current temperature control point calculated from the various setpoints and operating modes.

50 to 95°F

(10 to 35°C)

XBS for monitoring.

Table 25. Mapping of source points elsewhere on L

typical source (non-Excel 10 Controller)

description allowable values

variable name

OccSignal

Signal containing TOD Schedule mode command from the Excel 10 Zone Manager or a C-Bus controller.

Signal from a main equipment controller to command

FcuMode

the Excel 10 FCU Controller into a particular mode of operation.

Signal to tell Excel 10 FCU Controller to enter "emergency pressurize", or "emergency depressurize"

CmdEmerg

modes of operation. This signal would come from a controller that is monitoring/coordinating the building fire protection system.

Signal containing the Shed mode command (based on electrical demand) from the Excel 10 Zone Manager, or

DmndShed

a C-Bus controller. When signal is TRUE, the value in DlcStptBump is added to or subtracted from the temperature setpoint.

Amount (in degrees) to add to the temperature setpoint

SetPtOffset

reading for energy savings. Typically sent from another controller doing EMS calculations.

ONWORKS or C-Bus to Excel 10 FCU Controller receiver points

typical destination (Excel 10 FCU Controller) name

OC_OCCUPIED OC_UNOCCUPIED OC_STANDBY

DestSchedOcc

OC_NUL

HVAC_AUTO HVAC_HEAT HVAC_COOL

DestHvacMode

HVAC_OFF

HVAC_NUL

EMERG_NORMAL EMERG_PRESSURIZE

DestEmerg

EMERG_DEPRESSURIZE

NORMAL SETPOINT_SHIFT

-18 to +18 DDF (-10 to +10 K)

DestDlcShed

DestSptOffset

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

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.

Alarms

When an Excel 10 FCU Controller has an alarm condition, it reports it to the central node on the L (typically, the Excel 10 Zone Manager) via the variable nvoAlarm. See Table 26. The information contained in nvoAlarm is:

• Subnet Number: The L

the Excel 10 FCU Controller node that has the alarm condition. If the system has a Zone Manager and a router, Subnet 1 is on the Zone Manager side of the router; Subnet 2 is on the opposite side.

• 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 26.

All current alarms are contained in a variable called nvoAlarmStatus which is composed of three bytes

ONWORKS subnet that contains

ONWORKS network

(nvoAlarmStatus.alarm_bit[n] with n = 0 through 2) with a bit corresponding to each of the alarms listed in Table 26. 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.

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. These points can be viewed through XBS or E-Vision.

Certain alarm conditions are suppressed conditionally as follows:

If an input NV 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 occurs only when the nvoAlarm is bound to only one node using LonWorks subnet/node addressing and only after the input variable has actually received an NV from the node since the latest application restart (or power-up condition).

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EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Table 26. Excel 10 FCU Controller alarms

name of alarm or alarm bit

no alarm/return to normal:

RETURN_TO_NORMAL 128

ALARM_NOTIFY_DISABLED 255

ALM_NO_ALARM 0 No errors since last application restart; initial condition

FCU Alarms:

ALM_NODE_OFF 1

ALM_FROST 2

ALM_INVALID_SETPNT 3 One of the setpoints is not in the valid range

ALM_TEMP_SENSOR_FAIL 4 Temperature sensor failed

ALM_SETPNT_KNOB_FAIL 5 Remote setpoint potentiometer failed

ALM_FAN_SPEED_SW_FAIL 6 Fan speed switch failed

ALM_FAN_FAILURE 7

ALM_COMFAIL_SPACE_TEMP 8

ALM_COMFAIL_HVACMODE 9

ALM_COMFAIL_SETPTOFFS 10

ALM_COMFAIL_SCHEDOCC 11

ALM_COMFAIL_DLC 12

ALM_COMFAIL_TEMPRESET 13

ALM_COMFAIL_ODTEMP 14

ALM_COMFAIL_OCCSENSOR 15

ALM_COMFAIL_WINDOW 16

ALM_COMFAIL_MANHEAT 17

ALM_COMFAIL_MANCOOL 18

ALM_HW_SW_MISMATCH 19

alarm type

number

meaning of alarm code or alarm bit

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.

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.

The control algorithm has stopped due to controller disabled, or in test mode, or other conditions

The space temperature is below the frost alarm limit. The alarm condition remains until the temperature exceeds the alarm limit plus hysteresis.

Fan is commanded to be ON, but the air flow detector input does not detect the fan running.

nviSpaceTemp is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME

nviApplicMode is bound and has failed in receiving an update within its specified FAILURE_DETECT_TIME

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

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.

EN0B-0377GE51 R0703 36

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Broadcasting the Service Message

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.

When an Assign Neuron ID command is issued from EVision, 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

ONWORKS network. All other functions are normal in the

L 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.

E-Vision is used to perform the ID Assignment task during commissioning (see E-Vision User Guide, Step 12. Commission Controllers).

Manual Mode

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 E-Vision PC 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 and F, only; W7754?) can also be commanded ON/OFF in any combination. The override LED can be commanded ON/OFF in this mode also. See the EVision User Guide section for Manual Mode for detailed procedures.

37 EN0B-0377GE51 R0703

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

APPENDIX A. USING E-VISION TO COMMISSION A FAN COIL UNIT

Temperature Sensor Calibration

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 E-Vision (see the E-Vision User Guide for details on using E-Vision

the actual Measured Value. When a value is typed in and Calibrate is clicked, the offset value is automatically calculated, displayed, and written to the Excel 10 FCU Controller.

From within E-Vision, with the desired project loaded and the SLTA (Q7752A) connected to the L perform the following procedure:

1. Select a controller symbol from a network diagram.

2. Click on Calibrate from the Controller menu. Once E- Vision logs on to the controller, the Room Temperature Calibration dialog box appears.

3. The box displays the Current Value of the sensor and

the current Offset; it also contains a field for entering

ONWORKS network,

Fig. 21. Calibration dialog box

4. Click on Close after completing adjustments.

EN0B-0377GE51 R0703 38

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

APPENDIX B. CONFIGURING FOR MASTER/SLAVE OPERATION

More than one 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 NVs sent across the L max. 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.

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 E-Vision used for configuring FCU controllers. An additional section discusses binding of NVs to support master/slave configurations.

ONWORKS network. There can be a

Output Configuration Options

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.

IMPORTANT

The fan min. 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.

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 NV must be mapped to the master controller as the slave controller does not execute the control algorithm.

Equipment Control Options

Valve action and fan interlock settings must be the same as for the master controller. Output staging hysteresis, min. stage OFF times, and reheat switching and hysteresis should be the same as in the master controller.

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

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 (user address - SrcHeatPos) and nvoCoolOutput (user address - SrcCoolPos) must be bound using E-Vision (see E-Vision User Guide) to the slave input variables nviManHeat (user address - DestManHeat) and nviManCool (user address - DestManCool), respectively.

For a master/slave system using heat/cool changeover, the master controller output variable nvoApplicMode (user address SrcHvacMode) must be bound to the slave controllers’ input variable nviApplicMode (user address DestHvacMode) 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.

The T7780 wall module must be connected to the master controller. The master controller output variable nvoFanSpeed (user address - SrcFanSpeed) must be bound to the slave controllers’ input variable nviFanSpeedCmd (user address - DestFanSpeed).

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 NV binding described above for fan speed must still be performed as described.

For applications with reheat, the master controller output variable nvoReheat (user address - SrcReheatPos) must be bound to the slaves’ input variable nviReheatRelay (user address - DestReheat).

39 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

APPENDIX C. COMPLETE LIST OF EXCEL 10 FCU CONTROLLER USER ADDRESSES

Table C1. Analog points engineering units

English Units (Inch-Pound) Standard International Units (SI)

Measured Item

Temperature Degrees Fahrenheit F degrees Celsius C Relative Temperature Delta Degrees Fahrenheit DDF Kelvin K

The following tables list all NVs associated with the FCU Controllers and the default User Address names. Point attributes given are defined as follows:

—

Abbreviations

(used in CARE

and E-Vision)

—

Abbreviations

(used in CARE

and E-Vision)

SH— Sharable (bindable) points can be set up for data sharing in Command Multiple Points, Read Multiple Points,

MA— Mappable can be converted into a C-Bus point use by C-Bus devices. A mappable point has a one-to-one

DA— Direct Access points are accessible through the Subsystem Points mechanism in XBS. M— These points are viewable within the E-Vision Controller Monitoring on-line screen. HBT— These points are either sent out on the network (outputs) or received from the network (inputs) at a certain

NOTES:

1. Mapped points can be viewed and changed, on C-Bus devices such as an XI581, XI582 and XI584 and on an XBS central and LiveCARE.

2. All Excel 10 points, mappable and calibration, configuration and internal data sharing points, can be viewed and changed, as allowed, via Direct Access (DA) mode in the XBS subsystem menu or via XI584.

The tables are divided as follows:

Table C2—Configuration variables Table C3—Input variables Table C4—Output variables Table C5—Unused variables

or Refer Excel 10 Points as either a data source or a destination.

relationship with a C-Bus User Address.

fixed interval (heartbeat).

41 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

ApplType nciApplVer application_type UBYTE, 0 to 255 0

ApplVer nciApplVer version_no UBYTE, 0 to 255 0

ApplTime0 nciApplVer time[0] UBYTE, 0 to 255 0

ApplTime1 nciApplVer time[1] UBYTE, 0 to 255 0

ApplTime2 nciApplVer time[2] UBYTE, 0 to 255 0

ApplTime3 nciApplVer time[3] UBYTE, 0 to 255 0

nciDeviceName ch[0-17] UBYTE, 0 to 255 0

nciLocation SNVT_str_asc 0x00

nciMaxSendTime SNVT_temp_p

nciRcvHrtBt SNVT_time_sec

engineering units:

English (metric) or states

plus range

0 to 6553 seconds

0 to 6553 seconds 0 = Disabled

digital

state

value

default

0 s from factory, 60 s default from E-Vision

0 s from factory, 300 s default from E-Vision

nciSndHrtBt SNVT_time_sec

EN0B-0377GE51 R0703 42

0 to 6553 seconds 0 = Disabled

0 s from factory, 300 s default from E-Vision

(continued)

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X ApplicationType identifies the current application number of the Excel 10.

X VersionNo identifies the version number of the Excel 10 application.

X The time stamp of the last change to the Excel 10 application configuration. Time meets the ANSI

X See above.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

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.

nciDeviceName contains 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.

This configuration property can be used to provide more descriptive physical location information than can be provided by the Neuron chip's 6 byte location string.

This is the configuration property used to control the max. time that expires before the node object automatically transmits nvoStatus. 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 nciMaxSendTime = 0.

This is the configuration property used to control the max. 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.

This is the configuration property used to control the max. 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.

(continued)

43 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

FanMode nciCntrlSettings fan_auto_mode CONTINUOUS

FanRunUpTime nciCntrlSettings fan_run_up_time SNVT_time_sec

FanOvrRunTime nciCntrlSettings fan_overrun_time SNVT_time_sec

FirstStageCooL nciCntrlSettings switch_level_cool[0] SNVT_lev_percent

SecondStageCool nciCntrlSettings switch_level_cool[1] SNVT_lev_percent

ThirdStageCool nciCntrlSettings switch_level_cool[2] SNVT_lev_percent

FirstStageHeat nciCntrlSettings switch_level_heat[0] SNVT_lev_percent

SecondStageHeat nciCntrlSettings switch_level_heat[1] SNVT_lev_percent

ThirdStageHeat nciCntrlSettings switch_level_heat[2] SNVT_lev_percent

StageHyst1 nciCntrlSettings staging_hysteresis[0] SNVT_lev_percent

StageHyst2 nciCntrlSettings staging_hysteresis[1] SNVT_lev_percent

ReheatSwLevel nciCntrlSettings reheat_switch_level SNVT_lev_percent

ReheatHyst nciCntrlSettings reheat_hysteresis SNVT_lev_percent

FanMinOnTime nciCntrlSettings fan_min_on_time SNVT_time_sec

engineering units:

English (metric) or states

plus range

AUTO_MODE

0 to 600 seconds

0 to 100%, 0 = Disable

0 to 100%

0 to 1200 seconds

digital

state or

value

0 1

default

AUTO_MODE

50%

75%

50%

75%

10%

100%

FanMinOffTime nciCntrlSettings fan_min_off_time SNVT_time_sec

0 to 1200 seconds

DlcStptBump nciEnergyManag si_dlc_setpt_bump SNVT_temp_p

0 to 18 DDF (0 to 10 K)

RecRampCool nciEnergyManag si_optstart_grad[0] SNVT_temp_p

-36 to 0 DDF/hr (-20 to 0 K/hr)

RecRampHeat nciEnergyManag si_optstart_grad[1] SNVT_temp_p

0 to 36 DDF/hr (0 to 20 K/hr)

EN0B-0377GE51 R0703 44

3.6 DDF (2 K)

0 DDF/hr (0 K/hr)

(continued)

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X Fan_auto_mode is the configuration setting to determine the fan operation during the occupied

X Fan_run_up_time is the time the fan runs before the outputs are switched ON. It is typically used

X Fan_overrun_time is the time the fan still runs after the control algorithm has turned OFF the

X This is the switching level to turn ON stage 1 of the cooling equipment (if configured as

X This is the switching level to turn ON stage 2 of the cooling equipment (if configured as

X This is the switching level to turn ON stage 1 of the heating equipment (if configured as

X This is the switching level to turn ON stage 2 of the heating equipment (if configured as

X This is the switching level to turn ON stage 3 of the heating equipment (if configured as

X This value only applies to cool outputs configured as multistage outputs and specifies the

X This value only applies to heat outputs configured as multistage outputs and specifies the

X Reheat_switch_level specifies the switch-over control output level for the reheat output.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

mode. CONTINUOUS will cause the fan to run even in the zero energy band.

for electric heat outputs with fan interlock (see nciFcuConfig.fan_interlock_0 and _1). The interlock must be set.

cooling/heating outputs. It's 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.

multistage).

hysteresis between switching the cool stages ON and OFF.

hysteresis between switching the heat stages ON and OFF.

X Reheat_hysteresis specifies the hysteresis between switching the reheat output ON and OFF.

X Fan_min_on_time is the min. time the fan has to run when commanded ON by the control

X Fan_min_off_time is the min. time the fan has to remain OFF when commanded OFF by the

X This is used to shift the temperature setpoint during demand limit control load shedding. When

X This is the cooling gradient used by the optimum start function to calculate the optimum time for

X This is the heating gradient used to determine the optimum time to start increasing the current

algorithm. In case of smoke purge, this time will be ignored. The min_on_time starts as soon as the fan is switched ON.

control algorithm. In case of smoke purge, this time will be ignored. The min_on_time starts as soon as the fan is switched OFF.

nviDlcShed is different from zero, the current occupancy setpoint will be decreased by this value for heating and increased for cooling.

starting to decrease the effective setpoint smoothly from the unoccupied or standby cooling setpoint to the occupied cooling setpoint.

effective setpoint smoothly to the occupied setpoint at the beginning of scheduled occupancy.

(continued)

45 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

nciFcuConfig room_temp_sensor BYTE

nciFcuConfig fan_speed_switch BYTE

nciFcuConfig DI1_config BYTE

nciFcuConfig fan_config BYTE

nciFcuConfig output_mode[0] BYTE

nciFcuConfig output_mode[1] BYTE

nciFcuConfig output_type[0] BYTE

engineering units:

English (metric) or states

plus range

NO_TEMP_SENSOR NTC_NON_LINEARIZED

NO_SWITCH THREE_POSITION FOUR_POSITION FIVE_POSITION

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 DI_NO_MOVEMENT DI_NOT_USED

NO_FAN ONE_SPEED TWO_SPEED THREE_SPEED

OUTP_COOLING OUTP_HEATING OUTP_CHANGEOVER OUTP_NOT_USED

FLOATING ONE_STAGE TWO_STAGE THREE_STAGE PWM THERMAL FLOATING_MID

digital

state

value

0 2

0 1 2 3

0 1 2 3 4 5 6 7 8 9 255

0 1 2 3

0 1 2 255

0 1 2 3 4 5 6

default

NTC_NON_LINEARIZED

FIVE_POSITION

DI_NOT_USED

THREE_SPEED

OUTP_HEATING

OUTP_COOLING

FLOATING

nciFcuConfig output_type[1] BYTE

EN0B-0377GE51 R0703 46

FLOATING ONE_STAGE TWO_STAGE THREE_STAGE PWM THERMAL FLOATING_MID

FLOATING

1 2 3 4 5 6

(continued)

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

This specifies whether a direct wired room temperature sensor is connected to the node or a room temperature value from the network is used.

This variable specifies the type of fan speed switch ON the wall module.

This 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_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.

This specifies the type of fan connected to the controller.

This specifies the operating mode of the output 1.

This specifies the operating mode of the output 2. This setting is ignored for nciNumValve = TWO_PIPE.

This 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. ONE_STAGE - Triac 2 is not used. 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 PW M outputs, PwmZeroPosn and PwmFullPosn must also be specified.

This specifies the output type to drive the connected actuator for the output 2 (see above).

(continued)

47 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

nciFcuConfig valve_reverse_0 Bit

nciFcuConfig valve_reverse_1 Bit

nciFcuConfig fan_interlock_0 Bit

nciFcuConfig fan_interlock_1 Bit

nciFcuConfig cycle_time[0] SNVT_time_sec

nciFcuConfig cycle_time[1] SNVT_time_sec

engineering units:

English (metric) or states

plus range

DIRECT REVERSE

NO YES

0 to 1200s for stage output 0 to 600s for floating output 20 to 600s for PWM output

digital

state

value

0 1

default

DIRECT

150 s for floating

MinOffTime1 nciFcuConfig min_stage_off_time[0] SNVT_time_sec

0 to 600 seconds

MinOffTime2 nciFcuConfig min_stage_off_time[1] SNVT_time_sec

0 to 600 seconds

nciFcuConfig reheat_config BYTE

REHEAT FREE_USE REL_NOT_USED

nciFcuConfig PwmZeroPosn SNVT_lev_percent

0 to 100%

nciFcuConfig PwmFullPosn SNVT_lev_percent

0 to 100%

90 s

REHEAT 0 1 255

100%

(continued)

EN0B-0377GE51 R0703 48

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X This is only used for ONE_STAGE, TWO_STAGE, and THREE_STAGE output 1 and specifies

X This is only used for ONE_STAGE, TWO_STAGE, and THREE_STAGE output 2 and specifies

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

This setting applies to outputs only that have been configured as FLOATING, PWM, or THERMAL and specifies the direct/reverse operation of output 1.

This setting applies to outputs only that have been configured as FLOATING, PWM, or THERMAL and specifies the direct/reverse operation of output 2.

This variable configures interlock between fan and output 1 to provide equipment protection for electric heat or compressor. fan_interlock_0=1 enables interlock which guarantees that output 1 will be driven only when the fan is running.

This variable configures interlock between fan and output 2 to provide equipment protection for electric heat or compressor. fan_interlock_1=1 enables interlock which guarantees that output 2 will be driven only when the fan is running.

This specifies for the output 1 configured as

• 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: min. ON time before switching to the next

stage.

This specifies for the output 2 configured as

• 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: min. ON time before switching to the next

stage.

the min. OFF time before switching to the next stage.

the min. OFF time before switching to the next stage

This variable specifies the usage of the reheat relay. FREE_USE specifies that the relay is controlled via the network using the DestReheat user address.

This 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 PW M actuators.

This 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 PW M actuators.

(continued)

49 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

GainCoolProp nciFcuGains si_pid_Xp[0] SNVT_temp_p

GainHeatProp nciFcuGains si_pid_Xp[1] SNVT_temp_p

GainCoolInt nciFcuGains si_pid_Tn[0] SNVT_time_sec

GainHeatInt nciFcuGains si_pid_Tn[1] SNVT_time_sec

GainCoolDer nciFcuGains si_pid_Tv[0] SNVT_time_sec

GainHeatDer nciFcuGains si_pid_Tv[1] SNVT_time_sec

CoolBoost nciFcuGains si_boost[0] SNVT_temp_p

HeatBoost nciFcuGains si_boost[1] SNVT_temp_p

nciNumValve SNVT_count

SptCoolOcc nciSetPnts occupied_cool SNVT_temp_p

engineering units:

English (metric) or states

plus range

2.25 to 180 DDF (1.25 to 100 K), 0 = Disable

10 to 3200 seconds 0 = Disable

0.9 to 18 DDF (0.5 to 10 K) 0 = Disable

TWO_PIPE FOUR_PIPE

50 to 95°F (10 to 35°C)

digital

state

value

1 2

default

36 DDF (20 K)

250 s

0 s

1.8 DDF (1 K)

FOUR_PIPE

73.4°F (23°C)

SptCoolStby nciSetPnts standby_cool SNVT_temp_p

50 to 95°F (10 to 35°C)

EN0B-0377GE51 R0703 50

77°F (25°C)

(continued)

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X This is the throttling range for use in the proportional portion of the PID loop gain for the cooling

X This is the throttling range for use in the proportional portion of the PID loop gain for the heating

X This is the integral time for use in the integral portion of the PID loop gain for the cooling mode.

X This is the integral time for use in the integral portion of the PID loop gain for the heating mode.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

mode. The min. 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 min. value is 7.2 DDF (4 K).

X This is the derivative time for use in the derivative portion of the PID loop gain for the cooling

X This is the derivative time for use in the derivative portion of the PID loop gain for the heating

X This is the temperature range to be added to the cooling setpoint, above which the cooling output

X This is the temperature range to be subtracted from the heating setpoint, below which the heating

X X This is the default setpoint for the occupied cooling setpoint which is used in case there is no

X X This is the configured setpoint which applies to the standby cooling mode. Where the ZEB for

mode.

is fully open to allow a faster response. For thermal actuators it is the hysteresis for thermal control algorithm.

output is fully open to allow a faster response. For thermal actuators it is the hysteresis for thermal control algorithm.

This is the configuration property used to specify 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[].

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.

standby is used, it is derived from the difference between standby_cool and standby_heat.

(continued)

51 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SptCoolUnocc nciSetPnts unoccupied_cool SNVT_temp_p

SptHeatOcc nciSetPnts occupied_heat SNVT_temp_p

SptHeatStby nciSetPnts standby_heat SNVT_temp_p

SptHeatUnocc nciSetPnts unoccupied_heat SNVT_temp_p

BypTime nciWallMod ui_bypass_time UWORD

SptKnobLowLim nciWallMod si_low_setpt SNVT_temp_p

SptKnobHiLim nciWallMod si_high_setpt SNVT_temp_p

nciWallMod si_space_temp_zero_cal SNVT_temp_p

UseWallModSpt nciWallMod use_wall_mod_st_pt Bit

engineering units:

English (metric) or

states plus range

50 to 95°F (10 to 35°C)

0 to 1080 minutes

-9 to 9 DDF (-5 to 5 K) for relative

53.6 to 86°F (12 to 30°C) for absolute

-9 to 9 DDF (-5 to 5 K) for relative

53.6 to 86°F (12 to 30°C) for absolute

--9 to 9 DDF (-5 to 5 K)

NO YES

digital

state

value

0 1

default

82.4°F (28°C)

69.8°F (21°C)

66.2°F (19°C)

60.8°F (16°C)

180 min

-9 DDF (-5 K) (53.6°F (12°C) for absolute setpoint)

9 DDF (5 K) (86°F (30°C) for absolute setpoint)

0 DDF (0 K)

YES

SptKnob nciWallMod set_pnt_knob 2 Bits

OFFSET ABSOLUTE_MIDDLE

nciWallMod override_type 2 Bits

NO_BUTTON BYPASS_UNOCCUPIED BYPASS

nciWallMod override_priority Bit

LAST_WINS NETWORK_W INS

nciWallMod display_type Bit

LED_OVERRIDE LED_OCCUPANCY LCD_DISPLAY

EN0B-0377GE51 R0703 52

OFFSET

BYPASS_UNOCCUPIED 0 1 2

LAST_WINS 0 1

LED_OVERRIDE 0 1 2

Table C2. Configuration Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X This is the configured setpoint which applies to the "unoccupied" cooling mode.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

X X This is the default setpoint for the "occupied" heating setpoint which is used in case there is no

X X This is the configured setpoint which applies to the "standby" heating mode. Where the ZEB for

X X This is the configured setpoint which applies to the "unoccupied" heating mode.

X This is the parameter which determines the time the controller remains in the "occupied" mode

X X This is the low limit for the setpoint knob. It can be relative or absolute depending on the

X X This is the high limit for the setpoint knob. It can be relative or absolute depending on the

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.

standby is used, it is derived from the difference between standby_cool and standby_heat.

before reverting to the original occupancy mode after pressing the wall module's override button 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.

configuration in nciWallMod.set_pnt_knob.

The space temperature sensor is corrected by adding this calibration setting (an offset value) to the sensed value.

This specifies whether the setpoint used is from the knob on the wall module connected to the controller or ifrom 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).

This setting 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.

This setting determines 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.

This setting configures the priority of the local (wall module push-button) or central (network interface) override. If NETW ORK_WINS is set and the network sends value NUL, then the override button is active.

This setting configures 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.

53 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

DestHvacMode nviApplicMode SNVT_hvac_mode

DestDlcShed nviDlcShed BYTE

DestEmerg nviEmerg SNVT_hvac_emerg

DestFanSpeed nviFanSpeedCmd value SNVT_switch

engineering units:

English (metric) or states

plus range

HVAC_AUTO HVAC_HEAT HVAC_COOL HVAC_OFF HVAC_NUL

NORMAL SETPOINT_SHIFT

EMERG_NORMAL EMERG_PRESSURIZE EMERG_DEPRESSURIZE EMERG_PURGE EMERG_SHUTDOWN EMERG_NUL

0 to 100%

digital

state

value

0 1 3 6 255

0 1

0 1 2 3 4 255

default

HVAC_AUTO (if bound but fails to be received or at application restart)

0 (if bound but fails to be received or at application restart)

EMERG_NORMAL (at application restart)

100% (at application restart)

nviFanSpeedCmd state SNVT_switch

OFF ON NUL

nviInUse UWORD

0 to 65535

NUL (at application restart)

1 255

0 (if bound but fails to be received), 65535 ( for 60s at application restart)

(continued)

EN0B-0377GE51 R0703 54

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X X X X This is an input that coordinates the controller operation with the main equipment controller.

Depending on the available supply energy, the main equipment controller commands the FCU controller to operate in heat mode only, cool mode only or heat and cool mode if appropriate to the configuration. 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 heating/cooling changeover input, this input will always have priority over the network nviApplicMode’s HVAC_HEAT or HVAC_COOL.

X X X X X This is an input from an energy management system (e.g. Zone Manager). When = 0, the

temperature control algorithm operates in a normal mode. When = 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.

X X X X It is an emergency input from a device that determines the correct action during a given

emergency (such as a fire).

• 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_DEPRESSURIZE: heat/cool outputs OFF, fan OFF.

X X X X This input allows control of the fan speed by another node, such as another FCU Controller acting

as a master in a master/slave relationship or a Zone Manager providing central override capability for fan speed.

See above.

Comments

X This 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.

(continued)

55 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

DestManCool nviManCool SNVT_lev_percent

DestManHeat nviManHeat SNVT_lev_percent

DestManOcc nviManOccCmd SNVT_occupancy

DestManMode nviManualMode BYTE

engineering units:

English (metric) or states

plus range

0 to 100%

163.835% = INVALID

0 to 100%

163.835% = INVALID

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

MODE_ENABLE MODE_DISABLE MODE_MANUAL SUPPRESS_ALARMS UNSUPPRESS_ALARMS

digital

state

value

0 1 2 3 255

0 1 2 3 4

default

OC_NUL (at application restart)

MODE_ENABLE and UNSUPPRESS_ALARMS (at application restart)

DestReheat nviReheatRelay value SNVT_switch

0 to 100%

nviReheatRelay state SNVT_switch

OFF ON NUL

0 (at application restart)

OFF (at application restart) 0 1 255

(continued)

EN0B-0377GE51 R0703 56

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X X X X This 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.

X X X X X This 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.

X X X X This is an input from an network connected operator interface or other node that indicates the

state of manual occupancy control (schedule override). It has priority over the time program (DestSchedOcc). W hen 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.

X X X This is an input which 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: 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.

X X X X This 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.

See above.

Comments

(continued)

57 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

DestRequestObjId nviRequest object_id SNVT_obj_request

nviRequest object_request object_request_t

DestOccSensor nviSensorOcc SNVT_occupancy

DestRmTempSpt nviSetPoint SNVT_temp_p

engineering units:

English (metric) or states

plus range

UWORD 0=Node Object 1=Fan Coil Object

Enum from Echelon defined RQ_NORMAL RQ_UPDATE_STATUS RQ_UPDATE_ALARM RQ_REPORT_MASK

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_NUL

50 to 95°F (10 to 35°C)

327.67°C = INVALID

digital

state

value

0 2 4 5

0 1 2 255

default

OC_NUL (if bound but fails to be received or at application restart)

INVALID (at application restart)

DestSptOffset nviSetPtOffset SNVT_temp_p

-18 to 18 DDF (-10 to 10 K)

589.806 DDF (327.67 K) = INVALID

DestRmTemp nviSpaceTemp SNVT_temp_p

0 to 104°F (0 to 40°C)

621.806°F (327.67°C) = INVALID

nviTest output1_cmd BYTE

NORMAL_HC_MODE OFF1_OFF2 ON1_OFF2 OFF1_ON2 ON1_ON2 TESTPOSITION

nviTest output1_test_pos SNVT_lev_percent

0 to 100%

nviTest output2_cmd BYTE

NORMAL_HC_MODE OFF1_OFF2 ON1_OFF2 OFF1_ON2 ON1_ON2 TESTPOSITION

nviTest output2_test_pos SNVT_lev_percent

0 to 100%

0 (if bound but fails to be received or at application restart)

INVALID (if bound but fails to be received or at application restart)

0 1 2 3 4 5

NORMAL_HC_MODE (at application restart)

0 (at application restart)

NORMAL_HC_MODE (at application restart)

0 (at application restart)

(continued)

EN0B-0377GE51 R0703 58

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X This input variable belongs to the Node Object and provides the mechanism to request a particular

mode for a particular object within a node.

See above. Commanding any modes other the ones listed will result in an “invalid_request” when reading nvoStatus.

Comments

X X This allows an occupancy sensor of another Excel 10 controller to be used to indicate the sensed

X X X X This is an input intended for binding third-party nodes to authorize them for setpoint modifications.

X X X X X This is an input intended for binding third-party nodes to authorize them for setpoint shifting.

X X X X X This is the space temperature transmitted from another Excel 10 controller or another node that

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.

When this has been bound and a valid update is received, the local configured setpoints will no longer be directly used to determine the current occupancy setpoint. In the case of the "occupied" and "standby" modes, this input is used with the appropriate ZEB (derived from the configured setpoints); in the case of the "unoccupied" mode, the setpoint depends only on nciTempSetPts.unoccupied_cool/_heat. This input is stored in RAM and is lost after power failure. In this case, the setpoints of nciTempSetPts will be used until a valid nviSetpoint is received.

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.

has a temperature 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 network management tool when nviSpaceTemp is not bound to set the temperature to a fixed value.

This 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 TESTPOSITION: sets output based on output1_test_pos.

This is used for the TESTPOSITION of the output1_cmd and is based on the configured runtime/cycle time.

Same as output1_cmd for output 2.

Same as output1_test_pos for output 2

59 EN0B-0377GE51 R0703

(continued)

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

nviTest reheat_cmd BYTE

nviTest fan_control BYTE

nviTest override_LED BYTE

DestSchedOcc nviTodEvent current_state SNVT_tod_event.current_state

DestSchedOccNext nviTodEvent next_state SNVT_tod_event.next_state

DestSchedOccTime nviTodEvent time_to_next_state SNVT_tod_event.time_to_next

DestWindow nviWindow value SNVT_switch.value

engineering units:

English (metric) or states

plus range

NORMAL_HC_MODE OFF1_OFF2 ON1_ON2

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

NORMAL_LED_MODE LED_OFF LED_ON

OC_OCCUPIED OC_UNOCCUPIED OC_STANDBY OC_NUL

_state UWORD 0 to 2880 minutes

0 to 100%

digital

state

value

0 1 4

0 1 2 3 4 5 6 7 8

0 1 2

0 1 3 255

default

NORMAL_HC_MODE (at application restart)

NORMAL_FAN_MODE (at application restart)

NORMAL_LED_MODE (at application restart)

OC_OCCUPIED (if bound but fails to be received or at application restart)

0 (if bound but fails to be received or at application restart)

nviWindow state SNVT_switch.state

EN0B-0377GE51 R0703 60

CLOSED OPEN NO_WINDOW

0 1 255

NO_WINDOW (if bound but fails to be received or at application restart)

(continued)

Table C3. Input Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

This is used to test the reheat relay.

This is used to test the fan speed relays.

This can be used to test the wall module LED when nviManualMode = MODE_MANUAL.

X X X X This indicates to the node whether the space is currently scheduled to be occupied, standby or

X X X This indicates to the node whether the next scheduled occupancy mode will be occupied, standby

X X X This is the time in minutes until the next change of scheduled occupancy state. This time is

X X X X This allows a window contact node or another controller to be used as remote window contact.

unoccupied.

or unoccupied. This information is required by the controller to perform the optimum start strategy.

updated by the Zone Manager once every 60 seconds. This data is also used by the optimum start calculation (see nciEnergyManag).

More than one nvoWindow may be bound to one nviW indow, 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 nvoW indows bound to nviWindow indicate the window being closed for at least the failure detect time (nciSndHrtBt).

X See above.

(continued)

61 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcRmTempSptEff nvoActiveSetPt SNVT_temp_p

SrcAlarmSubnet nvoAlarm subnet UBYTE

SrcAlarmNode nvoAlarm node UBYTE

nvoAlarm type UBYTE

engineering units:

English (metric) or states plus

50 to 95°F (10 to 35°C)

621.806°F (327.67°C) = INVALID

0 to 255

ALM_NO_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 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 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 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

range

digital

state

value

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 255

default

RETURN_TO_NORMAL (at application restart)

(continued)

EN0B-0377GE51 R0703 62

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X This is an output showing the active setpoint of the control algorithm. It is based on the occupancy

setpoints, the offset and recovery ramping.

X The subnet is the LonWorks subnet number (in domain entry 1 of the node’s domain table).

X The node is the LonWorks node number (in domain entry 1 of the node’s domain table).

This is an output reporting the latest changed error condition 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.

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.

Comments

(continued)

63 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcAlarmLog1 nvoAlarmLog alarm_type[0] Same as nvoAlarm.type See nvoAlarm.type

SrcAlarmLog2 nvoAlarmLog alarm_type[1] Same as nvoAlarm.type See nvoAlarm.type

SrcAlarmLog3 nvoAlarmLog alarm_type[2] Same as nvoAlarm.type See nvoAlarm.type

SrcAlarmLog4 nvoAlarmLog alarm_type[3] Same as nvoAlarm.type See nvoAlarm.type

SrcAlarmLog5 nvoAlarmLog alarm_type[4] Same as nvoAlarm.type See nvoAlarm.type

SrcAlarmStatus1 nvoAlarmStatus error_bit[0] UBYTE

SrcAlarmStatus2 nvoAlarmStatus error_bit[1] UBYTE

SrcAlarmStatus3 nvoAlarmStatus error_bit[2] UBYTE

SrcHvacMode nvoApplicMode SNVT_hvac_mode

SrcCoolPos nvoCoolOutput SNVT_lev_percent

engineering units:

English (metric) or states plus

range

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

Bit coded Alarm: ALM_COMFAIL_HVACMODE ALM_COMFAIL_SETPTOFFS ALM_COMFAIL_SCHEDOCC ALM_COMFAIL_DLC ALM_COMFAIL_TEMPRESET ALM_COMFAIL_ODTEMP ALM_COMFAIL_OCCSENSOR ALM_COMFAIL_WINDOW

Bit coded Alarm: ALM_COMFAIL_MANHEAT ALM_COMFAIL_MANCOOL ALM_HW_SW_MISMATCH

HVAC_AUTO HVAC_HEAT HVAC_COOL HVAC_OFF

0 to 100%

163.835% = INVALID

digital

state

value

1 2 4 8 16 32 64 128

1 2 4

0 1 3 6

default

HVAC_OFF (at application restart)

EN0B-0377GE51 R0703 64

(continued)

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X A central node may poll the nvoAlarmLog output for a short history of alarms. It contains the last

X See above.

X See above. NvoAlarmLog.alarm_type[4] is the oldest alarm.

X This is a polled output containing a list of all the current errors detected by the node. A search for

X See above.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

five alarms reported via nvoAlarm. At the time a new nvoAlarm is issued, nvoAlarmLog is updated.

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.

X See above.

X X This is an output used to coordinate the slave devices with the master controller. It reflects the

X X This is the cooling output which is typically used for monitoring or bound to a cooling actuator node

current heat/cool medium based on supply energy available. This is required for configurations with heat/cool changeover. HVAC_OFF switches the heat/cool control OFF while still providing frost protection and reporting status and alarms.

or another controller 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%.

(continued)

65 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcStateDI1 nvoDigitInState value SNVT_switch.value

0 to 100%

nvoDigitInState state SNVT_switch.state

OFF ON NOT_ASSIGNED

SrcOccEff nvoEffectOcc SNVT_occupancy

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY

SrcFanSpeed nvoFanSpeed value SNVT_switch.value

0 to 100%

nvoFanSpeed state SNVT_switch.state

OFF ON NO_FAN

SrcFanSpeedSw nvoFanSpeedSw value SNVT_switch.value

0 to 100%

nvoFanSpeedSw state SNVT_switch.state

OFF ON NO_FAN_SPEED_SW

nvoFcuStatus field_no UBYTE

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 FIELD_MODE FIELD_ALARM_TYPE FIELD_DLC_SHED 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

engineering units:

English (metric) or states plus

range

digital

state

value

0 1 255

0 1 2 3

0 1 255

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

default

0 (at application restart)

NO_FAN (at application restart)

(continued)

EN0B-0377GE51 R0703 66

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X X X This 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.

See above.

Comments

X This is the output reflecting the effective occupancy mode derived from the time schedule,

X X This output reports the fan speed for the controller. It can be bound to another Excel 10 controller

X X X X This output allows the fan speed switch of a master controller to be used for all slave Excel 10

occupancy sensor, override button, and network occupancy override.

with a fan connected or to a third-party fan node.

X See above.

controllers in the same room.

See above.

X This 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).

(continued)

67 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcOccEffS nvoFcuStatus effect_occ SNVT_occupancy

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY

SrcOccOvrdHwS nvoFcuStatus hw_override SNVT_occupancy

OC_UNOCCUPIED OC_BYPASS OC_NUL (No Override)

SrcOccSchedS nvoFcuStatus sched_occ SNVT_occupancy

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL (No Override)

SrcOccSensorS nvoFcuStatus eff_sen_occ SNVT_occupancy

OC_OCCUPIED OC_UNOCCUPIED OC_NUL (No Override)

SrcOccOvrdNetS nvoFcuStatus net_man_occ SNVT_occupancy

OC_OCCUPIED OC_UNOCCUPIED OC_BYPASS OC_STANDBY OC_NUL

SrcOccSensorHwS nvoFcuStatus hw_sen_occ SNVT_occupancy

OC_OCCUPIED OC_UNOCCUPIED OC_NUL

SrcOvrdLedS nvoFcuStatus r_o_led SNVT_occupancy

OC_OCCUPIED OC_UNOCCIPIED OC_BYPASS OC_STANDBY OC_NUL

engineering units:

English (metric) or states plus

range

digital

state

value

0 1 2 3

1 2 255

0 1 2 3 255

0 1 255

0 1 2 3 255

0 1 255

0 1 2 3 255

default

SrcFcuModeS nvoFcuStatus mode BYTE

CTL_COOL CTL_HEAT 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

EN0B-0377GE51 R0703 68

0 1 2 3 4 5 6 7 8 255

(continued)

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X X This is the effective occupancy mode resulting from scheduled occupancy mode, occupancy

X X X It reports the current state of the remote override button.

X X It reports the current scheduled occupancy received via the network.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

sensor information, bypass push-button, or manual operator interface.

X X X This reports the effective state of occupancy sensor(s) connected either to the input terminals or to

X X This reports the manual occupancy from the network.

X X X It reports the state of the occupancy sensor wired to the node.

X X This variable reports the current state of the remote override LED which indicates the effective

X X X This is the current operating mode of the node determined by many inputs and arbitrated by

other nodes on the network that are bound to this controller..

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 OC_STANDBY: 2 flashes per second OC_NUL: OFF

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 ON and OFF outputs 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 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. 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.

(continued)

69 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

nvoFcuStatus alarm_type Same as nvoAlarm.type

SrcDlcShed nvoFcuStatus dlc_shed Bit

NOT ACTICE ACTIVE

SrcWindowS nvoFcuStatus eff_window_open Bit

CLOSED or NOT_ASSIGNED OPEN

SrcWindowHwS nvoFcuStatus hw_window_open Bit

CLOSED or NOT_ASSIGNED OPEN

SrcAirFlowS nvoFcuStatus fan_feedback Bit

FAN_OFF_AFTER_ON_CMD FAN_RUNS

SrcExternalRelS nvoFcuStatus external_active Bit

EXTERNAL_NOT_ACTICE EXTERNAL_ACTIVE

SrcFanSpeedS nvoFcuStatus fan_stages_active UBYTE

F_OFF F_SPEED1 F_SPEED2 F_SPEED3 F_NO_FAN

SrcOutput1S nvoFcuStatus output_position[0] SNVT_lev_percent

0 to 100%

163.835% = INVALID

SrcOutput2S nvoFcuStatus output_position[1] SNVT_lev_percent

0 to 100%

163.835% = INVALID

SrcReheatS nvoFcuStatus reheat_active SNVT_lev_disc

ST_OFF ST_ON ST_NUL (No Reheat)

SrcRmTempSptEffS nvoFcuStatus active_set_pt SNVT_temp_p

50 to 95°F (10 to 35°C)

621.806°F (327.67°C) = INVALID

SrcRmTempEffS nvoFcuStatus space_temp SNVT_temp_p

0 to 104°F (0 to 40°C)

621.806°F (327.67°C) = INVALID

SrcRestBypassTimeS nvoFcuStatus rest_bypass_time UWORD

0 to 65535 Min

engineering units:

English (metric) or states plus

range

digital

state

value

0 1

0 1 2 3 255

0 4 255

default

(continued)

EN0B-0377GE51 R0703 70

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X This is the latest alarm detected by the node (if any) and has the same value as nvoAlarm.type.

X X This indicates the state of the demand limit control.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

X X X This indicates the real status of the window detection, either from the digital input or from the

X X X This indicates the status of the digital input configured as a window contact.

X X X This indicates the status of the fan when the digital input is configured for an air flow sensor.

X X This applies to nciFcuConfig.reheat_config = EXTERNAL only and indicates the state of the relay.

X X X When the controller is configured for one or more fan stages, this output reports the current fan

X X This indicates the position of the output 1.

X X This indicates the position of the output 2.

X X This output reports the current state of the reheat output, when the controller is configured for one.

network.

stage active.

X X X This reports the current temperature control point calculated from the various setpoints, operating

X X X This reports the current space temperature used for the control algorithm.

X X This shows the current value in minutes of the active bypass timer

modes, and optimum start-up gradients.

(continued)

71 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

nvoFcuStatusP field_no Same as nvoFcuStatus.

SrcOccEffP nvoFcuStatusP effect_occ Same as nvoFcuStatus.

SrcOccOvrdHwP nvoFcuStatusP hw_override Same as nvoFcuStatus.

SrcOccSchedP nvoFcuStatusP sched_occ Same as nvoFcuStatus.

SrcOccSensorP nvoFcuStatusP eff_sen_occ Same as nvoFcuStatus.

SrcOccOvrdNetP nvoFcuStatusP net_man_occ Same as nvoFcuStatus.

SrcOccSensorHwP nvoFcuStatusP hw_sen_occ Same as nvoFcuStatus.

SrcOvrdLedP nvoFcuStatusP r_o_led Same as nvoFcuStatus.

SrcFcuModeP nvoFcuStatusP mode Same as nvoFcuStatus.

nvoFcuStatusP alarm_type Same as nvoFcuStatus.

SrcDlcShedP nvoFcuStatusP dlc_shed Same as nvoFcuStatus.

SrcWindowP nvoFcuStatusP eff_window_open Same as nvoFcuStatus.

SrcWindowHwP nvoFcuStatusP hw_window_open Same as nvoFcuStatus.

SrcAirFlowP nvoFcuStatusP fan_feedback Same as nvoFcuStatus

SrcExternalRelP nvoFcuStatusP external_active Same as nvoFcuStatus

SrcFanSpeedP nvoFcuStatusP fan_stages_active Same as nvoFcuStatus

SrcOutput1P nvoFcuStatusP output_position[0] Same as nvoFcuStatus.

SrcOutput2P nvoFcuStatusP output_position[1] Same as nvoFcuStatus.

SrcReheatP nvoFcuStatusP reheat_active Same as nvoFcuStatus

SrcRmTempSptEffP nvoFcuStatusP active_set_pt Same as nvoFcuStatus.

SrcRmTempEffP nvoFcuStatusP space_temp Same as nvoFcuStatus.

SrcRestBypassTimeP nvoFcuStatusP rest_bypass_time Same as nvoFcuStatus.

SrcHeatPos nvoHeatOutput SNVT_lev_percent

0 to 100%

163.835% = INVALID

engineering units:

English (metric) or states plus

range

digital

state

value

default

EN0B-0377GE51 R0703 72

(continued)

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

Same as nvoFcuStatus except not sent as heartbeat. This variable is sent only in response to a poll request, typically from a supervisory device.

X Same as nvoFcuStatus.

Same as nvoFcuStatus.

X Same as nvoFcuStatus.

X X This 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%.

Comments

(continued)

73 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcReheatPos nvoReheat value SNVT_switch.value

0 to 100%

nvoReheat state SNVT_switch.state

OFF ON NO_REHEAT

nvoSensor override_button Bit

NOT_PRESSED PRESSED

nvoSensor contact_state_DI1 Bit

CONTACT_OPEN CONTACT_CLOSED

nvoSensor raw_data[0] UWORD

0 to 65535

nvoSensor raw_data[1] UWORD

0 to 65535

nvoSensor raw_data[2] UWORD

0 to 65535

nvoSensor fan_speed_switch SNVT_lev_disc

ST_OFF ST_LOW ST_MED ST_HIGH ST_NUL (No Switch)

SrcRmTempSptHw nvoSensor remote_set_point SNVT_temp_p

-9 to 9 DDF (-5 to 5 K) for relative

53.6 to 86°F (12 to 30°C) for absolute

SrcRmTempHw nvoSensor space_temp SNVT_temp_p

0 to 104°F (0 to 40°C)

621.806°F (327.67°C) = INVALID

nvoSensor ub_hard_config BYTE

INITIAL W7752D, F W7752E, G INVALID

W7754K,L,M,N,P

engineering units:

English (metric) or states plus

range

digital

state

value

0 1 2

0 1

0 2 3 4 255

0 4 5 255

default

INITIAL (at application restart)

(continued)

EN0B-0377GE51 R0703 74

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X This output 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.

X See above.

This indicates the status of the override push-button.

This indicates the state of the digital input.

This 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.

Same as above for the fan speed switch.

Same as above for the setpoint knob.

Comments

This output indicates the position of the fan speed switch on the wall module.

X This is the set point from the wall module setpoint knob and may be absolute or relative depending

X This is the measured space temperature.

upon nciWallMod.set_pnt_knob.

This is used to establish hardware-dependent factory default configuration settings for the FCU controller. Note that D and F versions and E, G and J versions differ only in their supply voltage.

(continued)

75 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcOccSensor nvoSensorOcc SNVT_occupancy

SrcRmTempEff nvoSpaceTemp SNVT_temp_p

SrcObjId nvoStatus object_id UWORD

nvoStatus invalid_id Bit

nvoStatus invalid_request Bit

nvoStatus disabled Bit

nvoStatus comm_failure Bit

nvoStatus in_alarm Bit

nvoStatus report_mask Bit

SrcTermLoad nvoTerminalLoad SNVT_lev_percent

engineering units:

English (metric) or states

plus range

OC_OCCUPIED OC_UNOCCUPIED OC_NUL (No Sensor)

0 to 104°F (0 to 40°C)

621.806°F (327.67°C) = INVALID

NODE_OBJECT FCU_OBJECT

VALID_ID INVALID_ID

VALID_REQUEST INVALID_REQUEST

ENABLED DISABLED

COMMUNICATION_OK COMMUNICATION_FAILURE01

NO_ALARM IN_ALARM

NO_REPORT_MASK REPORT_MASK

-163..163%

163.835% = INVALID

digital

state

value

0 1 255

0 1

default

OC_NUL (at application restart)

INVALID (at application restart)

SrcHvacModeU nvoUnitStatus mode SNVT_hvac_mode

HVAC_HEAT HVAC_COOL HVAC_OFF

SrcHeat nvoUnitStatus heat_output_primary SNVT_lev_percent

0 to 100%

163.835% = INVALID

SrcReheat nvoUnitStatus heat_output_secondary SNVT_lev_percent

0 to 100%

163.835% = INVALID

EN0B-0377GE51 R0703 76

1 3 6

(continued)

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X X X This is an output showing 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.

Comments

X X This is the sensed space temperature at the node taken from the locally-wired sensor. It is

X X This output belongs to the Node Object and reports the status for any object on a node. This is the

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 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 nviSpaceTemp is bound to another node, nvoSpaceTemp is not reported on the network.

answer to the nviRequest.

X This indicates whether nviRequest uses a fault object ID.

X This indicates whether nviRequest uses a fault request.

X This indicates whether the device is enabled or disabled (nviManualMode = DISABLE).

X This indicates whether an update nviRcvHrtBt is missing.

X This indicates whether an alarm occured. See nvoAlarm.

X This shows the answer to nviRequest > REPORT_MASK

X X X X X This is an output showing the terminal load, which is a percentage between -160% and +160%

X X X X X This output variable reports the last operating mode of the control algorithm. It is not set to

X X X X This reports the actual heating output value. Any change forces nvoUnitStatus to be transmitted

X X X X This output reports the reheat output value.

based on 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%).

HVAC_OFF if the heating and cooling output shows 0%. HVAC_OFF is set when the device is disabled from nviRequest, nviManualMode or nviApplicMode.

immediately.

(continued)

77 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

SrcCool nvoUnitStatus cool_output SNVT_lev_percent

SrcFanSpeedU nvoUnitStatus fan_output SNVT_lev_percent

SrcAlarmUnit nvoUnitStatus in_alarm UBYTE

SrcWindow nvoWindow value SNVT_switch.value

nvoWindow state SNVT_switch.state

NodeType0 nroPgmVer id[0] UBYTE, 70 = F

NodeType1 nroPgmVer id[1] UBYTE, 67 = C

NodeType2 nroPgmVer id[2] UBYTE, 85 = U

NodeType3 nroPgmVer id[3] UBYTE, 50 = 2

NodeVerMajor nroPgmVer major_ver UBYTE, 0 to 255

engineering units:

English (metric) or states plus

range

0 to 100%

163.835% = INVALID

0 to 100%

NO_ALARM ALARM ALARM_NOTIFY_DISABLED

0 to 100%

CLOSED OPEN NO_WINDOW

digital

state

value

255

default

0 (at application restart)

NO_WINDOW (at application restart)

NodeVerMinor nroPgmVer minor_ver UBYTE, 0 to 255

NodeVerBug nroPgmVer bug_ver UBYTE, 0 to 255

NodeTypeNumber nroPgmVer node_type UBYTE, 10 = FCU2

EN0B-0377GE51 R0703 78

Table C4. Output Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X X X X This reports the actual cooling output value. A change of more than 1% forces nvoUnitStatus to be

X X X This output reports the actual fan speed level.

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

transmitted immediately.

X X X This reports the actual alarm status of the controller and is set to ALARM_NOTIFY_DISABLE

X X X X This reports the status of the window sensor. It allows the locally-wired window sensor to be used

X This identifies the Excel 10 node type by an eight byte constant describing the node type, major

X Second character.

X Third character.

X Fourth character.

X Major Functional Release Number:

X Minor Functional Release Number:

X Bug Fix Number:

X Node type number.

when nviManualMode = SUPPRESS_ALARMS.

by other nodes on the network.

X See above.

and minor functional release number and bug fix. First character.

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.

1. Network variables are unchanged.

2. Functionality of the control algorithm has been revised and affects compatibility with other nodes or the equipment being controlled.

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.

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.

79 EN0B-0377GE51 R0703

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Table C5. Unused Variables for Excel 10 W7752 and W7754 FCU Controllers (left)

user address NvName field name

nciApplVer not_used1 UBYTE

nciApplVer not_used2 UBYTE

nciCntrlSettings reserve 7 bits

nciFcuConfig not_used 4 bits

nciWallMod spare_field[0] UBYTE

nciWallMod spare_field[1] UBYTE

nvoFcuStatus not_used 3 bits

nvoFcuStatus spare_field[0] WORD

nvoFcuStatusP not_used Same as nvoFcuStatus

nvoFcuStatusP spare_field[0] Same as nvoFcuStatus

nvoSensor not_used 6 bits

nvoStatus out_of_limits Bit

nvoStatus open_circuit Bit

nvoStatus out_of_service Bit

nvoStatus mechanical_fault Bit

nvoStatus feedback_failure Bit

nvoStatus over_range Bit

nvoStatus under_range Bit

nvoStatus electrical_fault Bit

nvoStatus unable_to_measure Bit

nvoStatus fail_self_test Bit

nvoStatus self_test_in_progress Bit

nvoStatus locked_out Bit

nvoStatus manual_control Bit

nvoStatus in_override Bit

nvoStatus reserved1 Bit

nvoStatus reserved2 Bit

nvoUnitStatus econ_output SNVT_lev_percent

engineering units:

English (metric) or states

plus range

digital

state

value

default

EN0B-0377GE51 R0703 80

Table C5. Unused Variables for Excel 10 W7752 and W7754 FCU Controllers (right)

Share (SH), Map (MA),

Direct Access (DA)

Monitor (M), Heartbeat (HBT)

SH MA DA M HBT

X Not used.

X Not supported

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

Comments

Reserved for future use.

Not used.

Not used

Reserved for future use.

81 EN0B-0377GE51 R0703

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

APPENDIX D. Q7750A EXCEL 10 ZONE MANAGER POINT ESTIMATING GUIDE

Memory size approximation is shown in Fig. 22: (All sizes in bytes.) When memory size is less than 110 Kbytes, the size is adequate.

2. Calculate the number of Excel 10 Zone Manager

program points that will be used in the control logic and in the switching table.

When memory size is between 110 and 128 Kbytes, the application may be too large. The user must expect to reduce the application complexity, reduce the number of attached Excel 10 FCU Controllers or distribute the Excel 10 FCU Controllers among more than one Zone Manager.

When memory size is greater than 128 Kbytes, the size is too large. The application size must be reduced as described above.

Approximate Memory Size Estimating Procedure

1. Determine the number of points per controller required

at the Central (for example, XBS).

NOTE: All remaining points that are not mapped are

available for accessing through the Direct Access feature.

3. Estimate the program complexity of the Zone Manager

(one of three levels).

a. No time programs, control logic, or switching

tables.

b. 10 Kbyte of control logic (one time program, five

switching tables, and five control loops).

c. 20 Kbyte of control logic (multiple time programs,

ten switching tables, and ten control loops).

Use Fig. 22 to determine the number of Excel 10 Controllers that can be connected to the Zone Manager.

NOTE: Where the number of Excel 10 Controllers

exceeds 60 a router is required.

4. Repeat the calculation for each Q7750A Excel 10 Zone

Manager in the project.

Fig. 22. Point capacity estimate for Zone Manager

The exact equation to use to calculate memory size is:

Memory size = 21,780 byte

+ 4096 byte (in case of a time program) + CARE Control Program + 14 byte x time points x Excel 10 Controllers + 50 byte x Excel 10 Controllers + map complexity x Excel 10 Controllers x mapped points + 57 byte x C-Bus points + 7488 byte x Excel 10 Controller types

Where:

time points = number of switch points in time

program per Excel 10 FCU Controller

Excel 10 Controllers = number of attached Excel 10

FCU Controllers

EN0B-0377GE51 R0703 82

C-Bus points = including mapped points and

others; for example, Remote Points

Mapped points = number of mapped points for

each Excel 10 FCU Controller, including one-to-many and many-to-one mechanism

Excel 10 Controller types = number of different Excel 10

Controller types (currently one)

Map complexity =

20 = using one-to-many and not

using points with read/write

ability 30 = average 45 = many points with read/write

ability

EXCEL 10 FCU CONTROLLER SYSTEM ENGINEERING

83 EN0B-0377GE51 R0703

EXCEL 10 FAN COIL UNIT CONTROLLER SYSTEM ENGINEERING

Automation and Control Solutions

Honeywell GmbH Böblinger Straβe 17 D-71101 Schönaich Phone: (49) 7031 63701 Fax: (49) 7031 637493 http://europe.hbc.honeywell.com

Subject to change without notice. Printed in Germany Manufacturing location certified to

EN0B-0377GE51 R0703 (74-2961-5)

Honeywell W7752J, W7754P, W7752G, W7754K, W7752D SYSTEM ENGINEERING

Specifications and Main Features

Frequently Asked Questions

User Manual