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Honeywell T7350 System Engineering
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Honeywell T7350 System Engineering

Commercial programmable thermostat
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See also: Product Data , User Manual
Commercial Programmable Thermostat
Abbreviations and Definitions ..................................................................................................................................
Network Configurations ..................................................................................................................................
Application Steps .................................................................................................................................. 10
Appendix A - Network Tools & Workstations ......................................................................................................................... 20
Appendix B - Network Alarm Reporting .................................................................................................................................. 21
Appendix C - Network Error Reporting ................................................................................................................................... 23
Appendix D - Network Access to Local Sensor Data ............................................................................................................. 25
Appendix E - Scheduling Network Devices ............................................................................................................................ 25
Appendix F - Network Master Clock ........................................................................................................................................ 25
Appendix G - Network Connections to Other LCBS Devices ................................................................................................ 26
Appendix H - T7350H Network Variable Summary ................................................................................................................. 34
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
Introduction ..................................................................................................................................
Device Description ..............................................................................................
Control Application ..............................................................................................
Network Control Provided ...................................................................................
Models ..................................................................................................................................
Products Covered ................................................................................................
Applicable Literature ............................................................................................
Performance Specifications .................................................................................
Communications ..................................................................................................
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Overview ............................................................................................................. 10
Step 1. Plan the System ...................................................................................... 11
Step 2. Determine Required Network Devices .................................................... 11
Step 3. Layout Communications and Power Wiring: .......................................... 11
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Cable Termination ............................................................................................... 12
Wiring Details ...................................................................................................... 12
Step 4. Prepare Wiring Diagrams ........................................................................ 12
General Considerations ....................................................................................... 15
Step 5. Order Equipment ..................................................................................... 17
Step 6. Configure T7350 ..................................................................................... 17
Step 7. Troubleshooting ....................................................................................... 18
Functional Profile ..............................................................................
Bus Layout ...................................................................................... 11
T7350
SYSTEM ENGINEERING
Contents
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Summary of Contents for Honeywell T7350

  • Page 1: Table Of Contents

    Step 4. Prepare Wiring Diagrams ................ 12 General Considerations ..................15 Step 5. Order Equipment ..................17 Step 6. Configure T7350 ..................17 Step 7. Troubleshooting ..................18 Appendix A - Network Tools & Workstations ......................... 20 Appendix B - Network Alarm Reporting ..........................21 Appendix C - Network Error Reporting ...........................

  • Page 2: Introduction

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT INTRODUCTION Device Description Control Application ® The T7350H is a L certified thermostat that provides The T7350H programmable communicating Thermostat ® networking capability in a L system using a controls commercial single zone heating, ventilating and air ORKS transformer-coupled Free Topology Transceiver (FTT).

  • Page 3: Network Control Provided

    • Q7740A,B FTT Repeaters. Network connected Workstations and Configuration Tools are • 209541B FTT Termination Module. used to view and modify additional T7350 operational modes: • Command Fan operating mode (On, Auto) See Table 2 for additional products. • Command Application mode (Auto, Off, Heating, Cooling) Table 2.

  • Page 4: Applicable Literature

    T7771 Wall Module Product Data ™-ZL7760A—A network connected tool which configures, commissions, calibrates and monitors the 74-2972 S7760A Command Display Specification Honeywell Light Commercial Building Solution Q7300, Data. T7350H, Excel 10 and Excel 15 family of controllers. 74-2858 Q7740A,B FTT Repeater Specification Data.

  • Page 5: Performance Specifications

    In the case automatically communicated to the bound input network of the T7350, schedules are organized around a eight day variable(s) in other node(s). When an input network variable is weekly structure including an extra day for designated updated, a nv_update_occurs and the event is posted at the holidays.
  • Page 6 48 hours. Q7740A FTT network 2-way repeater. Q7740B FTT network 4-way repeater. NOTE: To achieve the 48-hour power-loss clock retention, TG511, TG512 Universal Versaguard™ Thermostat the T7350 must be powered for at least 5 minutes. guards. 63-4368...

  • Page 7: Communications

    IV, 22 AWG (0.34 sq mm) plenum or non-plenum rated unshielded, twisted pair, solid or stranded conductor wire. 1-5/8 2-3/8 (60) 1-5/8 Refer to Table 2 for a list of Honeywell network cable part (42) (42) 3-1/4 (83) numbers. Other Echelon® approved cable may also be used.

  • Page 8: Lon Mark ® Functional Profile

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT ® Functional Profile Hardware Output Hardware Output Node SCC-Rooftop Object Number 8504. Object Mandatory nviRequest nvoStatus nviSpaceTemp nvoSpaceTemp Mandatory nv26 SNVT_obj_request SNVT_temp_p SNVT_ obj_status SNVT_ temp_p Network Network Variables nv27 nvoUnitStatus Variables SNVT_hvac_status nviTimeSet nvoFileStat SNVT_ time_stamp...

  • Page 9: Network Configurations

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT NETWORK CONFIGURATIONS the user is not prevented from making local schedule changes at the recipient thermostat. Local schedule changes (at a recipient device) have no effect on the The T7350H can be configured to perform a variety of scheduling commands received from the master device.

  • Page 10: Application Steps

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT value will be used in the T7350H as the primary controlled • Occupancy Bypass: variable. The local space temperature sensor of the Any internal or external scheduled unoccupied state in the T7350H is ignored until the network sensor fails.

  • Page 11: Step 1. Plan The System

    BUS ACCESS RS-232 LonWorks SLTA T7350H MODEM MODEM SLTA RS-232 LonWorks T7350H T7350H T7350H T7350H MODEM RS-232 LonWorks SLTA T7770 LonWorks JACK FOR OPERATOR TERMINAL I/O CONNECTIONS M22493 ® Fig. 5. Typical topology for T7350 devices in L network. ORKS 63-4368...

  • Page 12: Cable Termination

    Step 4. Prepare Wiring Diagrams terminated module at a T7350H (T7350H is the first or last Fig. 9 through 12 show T7350 terminal arrangements and device on the network cable) connect the termination module provide detailed wiring diagrams. Reference these diagrams wiring on the appropriate terminals as shown in Fig.
  • Page 13 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT OUTDOOR COMPRESSOR T7770 REMOTE SENSOR ECONOMIZER SENSOR CONTACTOR 2 DISCHARGE HEAT HEAT RELAY 3 RELAY 2 SENSOR SUBBASE W3/Y4 Y3 COMPRESSOR CONTACTOR 3 ® HEAT ORKS HUMIDITY MOTION RELAY RELAY 1 SENSOR SENSOR ® ORKS COMPRESSOR...
  • Page 14 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT MODULATING OUTDOOR COOL – T7770 REMOTE SENSOR (4-20 mA) SENSOR MODULATING DISCHARGE HEAT – (4-20 mA) SENSOR SUBBASE ® HEAT ORKS HUMIDITY MOTION RELAY RELAY 1 SENSOR SENSOR ® ORKS COMPRESSOR CONTACTOR 1 ECONOMIZER (HOT) (HOT)

  • Page 15: General Considerations

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT General Considerations Table 8 lists wiring types, sizes and distances for the T7350 and Excel 10 products. The T7350 terminal strip accepts 18 through 22 AWG (0.82 to 0.34 sq. mm) wire. Table 8. Field Wiring Reference.
  • Page 16 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 9. Honeywell Cable Details. Honeywell Part Number Size (AWG) Number of wires Jacket Plenum Rated Description AK3798 E-bus cable. AK3797 E-bus cable. AK3799 E-bus cable. AK4606ABE Beige jacket. AK4628AWH White jacket. AK3702x — AK3741A —...

  • Page 17: Step 5. Order Equipment

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Step 5. Order Equipment After compiling a bill of materials through completion of the previous application steps, refer to Table 10, Ordering Information. Table 10. Ordering Information. Part Number Product Description Comments T7350H1009 Communicating Thermostat with three heating and •...

  • Page 18: Step 7. Troubleshooting

    Bad thermostat location. Relocate the thermostat. Display shows three dashes and a T7350 is set for remote sensing and sensor is missing or circuit is degree sign (all systems shut down). either open or shorted. Temperature Upper or lower temperature limits...
  • Page 19 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 11. Troubleshooting Information. (Continued) Symptom Possible Cause Action Cooling will not No power to the thermostat. Check that X terminal is connected to the system transformer. come on. Check for 24 Vac between X and RH terminals.

  • Page 20: Appendix A - Network Tools & Workstations

    View & Modify Temperature Setpoints Report T7350 alarm data Network Time Scheduler for T7350 Devices Generate Trend & Log files with T7350 data User defined T7350 analog & digital alarms Update T7350 Time Clock Set T7350 as network Time Master...

  • Page 21: Appendix B - Network Alarm Reporting

    -125: AT_rtnSENSOR_FAIL -124: AT_rtnINVALID_IO_CONFIG -123: AT_rtnCOVER_COMM_FAIL -122: AT_rtnCOVER_SUBBASE_MISMATCH -1: AT_ALARM_NOTIFY_DISABLED Table 14. T7350 Current Alarm Status. The T7350 current alarm status is reported by the manufacturer defined output network variable nvoAlarmStatus. nvoAlarmStatus Description Field coverCommFail Communications between the cover and sub-base.
  • Page 22 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Identifying Five Most Recent T Table 15. 7350 Alarms. The five most recent T7350 alarms are identified in the manufacturer defined output network variable nvoAlarmLog. nvoAlarmLog Field Description alarm1 Alarm log: Most recent alarm. Alarm Codes...

  • Page 23: Appendix C - Network Error Reporting

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX C - NETWORK ERROR REPORTING Reporting T Table 16. 7350H Errors. T7350H errors are reported through the manufacturer defined output network variable, nvoError. nvoError Field Description errLoclSpaceSensr Local space temperature sensor not working. 0: Sensor value is OK. (power up value) 1: Sensor is configured to function and is out of range or disconnected.
  • Page 24 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Reporting T Table 16. 7350H Errors. (Continued) T7350H errors are reported through the manufacturer defined output network variable, nvoError. nvoError Field Description errSubBaseVerMisMatch Sub-base/cover firmware mismatch. 0: Sub-base and cover firmware are compatible. (power up value) 1: The firmware version in the sub-base is unable to communicate correctly with the firmware version of the cover assembly.

  • Page 25: Appendix D - Network Access To Local Sensor Data

    • XL10 controllers. This is accomplished by a one to many binding from the A single T7350 can be configured to schedule all (up to 119) source T7350H to the destination controller. The following is of the compatible controllers connected to the same network.

  • Page 26: Appendix G - Network Connections To Other Lcbs Devices

    T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT APPENDIX G - NETWORK CONNECTIONS TO OTHER LCBS DEVICES Table 18. Network Connections to XL15A AP Inputs. T7350H Network Variable Outputs can be used as inputs to XL15A application objects. XL15A Source T7350H Application Object Application Input...
  • Page 27 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 18. Network Connections to XL15A AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15A application objects. XL15A Application Input Source T7350H Network Variable Field Application Object Network Variable nvoData2 RelayCool2...
  • Page 28 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 18. Network Connections to XL15A AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15A application objects. XL15A Application Input Source T7350H Network Variable Field Application Object Network Variable nvoError errnviSpaceRH...
  • Page 29 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 18. Network Connections to XL15A AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15A application objects. XL15A Source T7350 Application Object Application Input Network Variable Network Variable Field nvoData2 RelayFan...
  • Page 30 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 19. Network Connections to XL15A AP Outputs. T7350H Network Variable Inputs can be connected to XL15A application outputs. XL15A Destination T7350H Application Object Application Output Network Variable Network Variable Field Network Time Schedule Scheduled Device List...
  • Page 31 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 20. Network Connections to XL15C AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15C application objects. XL15C Source T7350H Application Object Application Input Network Variable Network Variable Field nvoData2 stagesActive...
  • Page 32 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 20. Network Connections to XL15C AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15C application objects. XL15C Source T7350H Application Object Application Input Network Variable Network Variable Field nvoError ErrRemtHumSensr...
  • Page 33 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 20. Network Connections to XL15C AP Inputs. (Continued) T7350H Network Variable Outputs can be used as inputs to XL15C application objects. XL15C Source T7350H Application Object Application Input Network Variable Network Variable Field nvoAlarmStatus InvalidSubBaseType...

  • Page 34: Appendix H - T7350H Network Variable Summary

    Format. If the T7350 keyboard or the PDA Config Tool updates any configuration parameters, the time is incremented. 0: (Default). Version Number: identifies the version number of the application for this device. If the T7350 keyboard or the PDA Config Tool updates any configuration parameters, is incremented. 0: (Default). nciBypassTime...
  • Page 35 0: Disable periodic update (Default). 55: Typical value in Honeywell system. nroPgmVer Program Version CONST The Honeywell program identifier and subbase firmware version number. nroT7350Ver T7350 Version CONST Detailed T7350 cover assembly firmware version information.
  • Page 36 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nviBypass Bypass In Remote time bypass input from usually from another device. Bypass is a method to command unoccupied override over the network from another controller.
  • Page 37 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nviManValue Manual Value In Manual override values for outputs: Relays: Y1, Y2, Y3, Aux, G, W1, W2, W3 Analog Outputs: Mc, Mh...
  • Page 38 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nviOccSensor Occupancy Sensor In There are 3 distinct modes of operation: local occupancy sensor, network occupancy sensor, or none. The network occupancy input is nviOccSensor. It is bound from another sensor or controller with occupancy status.
  • Page 39 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nvoAlarmH Alarm Out Alarm subnet, node and type. Alarm subnet is the LonWorks subnet number in domain entry to which nvoAlarmH is bound. If nvoAlarmH is not bound reports domain index 0.
  • Page 40 Bypass Out The T7350H uses nvoBypass to command bypass to other XL10 nodes. When the T7350 is in bypass, it commands nvoBypass. This is a one to many bound relationship. “Many” means one T7350H can command bypass on all XL10s connected on the subnet.
  • Page 41 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nvoOccSchedule Time Of Day Out This output has current state, next state and tuncos (Time Until Change of State). This output is typically bound to other controller(s) that need a schedule command.
  • Page 42 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nvoStatus Status Status: Alarm notify disabled: 0: Alarm notification is turned on (power up value). 1: Alarm notification via nvoAlarmH, nvoAlarmLog, nvoUnitStatus, and nvoStatus has been turned off.
  • Page 43 T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT Table 21. T7350H Network Variable Summary. (Continued) Nv Name ™ Ref Name Class Description nvoUnitStatus Unit Status Unit Status: Percentage of cooling capability currently being supplied to the controlled space. 163.84: Power up value. Fan turned on or off: 0: Fan not running.
  • Page 44 Corporation. ORKS ® LonSpec™, and LonStation™ are trademarks of Echelon Corporation. Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American Region Honeywell International Inc. Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget 1985 Douglas Drive North...

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