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Fan coil unit controller · BACnet points list

Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) BACnet points list

Updated 7 November 2026

Short answer

Application 6611 runs a unit conditioner on a Siemens BACnet PTEC controller over BACnet MS/TP. It can drive spring-return 0-10 V heating and cooling valves, up to three on/off heating or cooling stages or one floating valve, and a fan by three speed relays or a 0-10 V drive. It supports an ON/OFF switch, an occupancy sensor (PIR), wall switch or night override button for occupancy, a DI or load-based heat/cool switchover, up to three alarm inputs with three alarm levels, and control from room or auxiliary temperature.

This page lists 108 BACnet objects for the Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) — 95 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Siemens’s own free documentation, linked below.

Manufacturer
Siemens
Model
BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)
Equipment
Fan coil unit controller
Equipment type
VAV boxes & fan coils
BACnet objects
108 (95 writable)
Transport
BACnet MS/TP
Firmware
Newer than revision Bx40
Also known as
PTEC 6611, Application 6611, App 6611, 550-480PA, Siemens fan coil multi-speed fan, Unit Conditioner
Source document
BACnet PTEC Controller Unit Conditioner Heating and Cooling Controller with Multi-Speed Fan, ON/OFF Switch, and Occupancy Sensor, Application 6611, Application Note · 140-1178 · rev. 2016-12-22
Download CSV 108 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Compare with your scan Download Easy BACnet Mobile App Google Play

Reference only, provided as-is: verify against Siemens’s current documentation and the live device before use. Not official Siemens information. Terms of use.

BMS integration notes: Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)

Integration in brief

Address the controller on the BACnet MS/TP trunk. The BMS commands occupancy with OCC.UNOCC (BO 29) and the occupied setpoints, and reads room temperature, the on/off state, fan speed, valve outputs and the alarm level.

Minimum points to map

The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.

ObjectNameWhyAccess
BO 29OCC.UNOCCOCC = occupied, UNOCC = unoccupiedCommand
AO 6OCC CLG STPTOccupied cooling setpoint, °FCommand
AO 7OCC HTG STPTOccupied heating setpoint, °FCommand
BO 28ON.OFFController on/off stateCommand
BO 5HEAT.COOLCurrent mode: HEAT or COOLCommand
AI 4ROOM TEMPSpace temperatureRead
AO 26FAN SPEEDFan speed (0 off to 3 high)Command
AO 57HTG AOV 2Heating valve output, VCommand
AO 58CLG AOV 3Cooling valve output, VCommand
AO 27ALARMAlarm level (0 none to 3 high)Command

Enable & remote start

Occupancy is OCC.UNOCC (BO 29): a wall switch on DI 2 (DI2 CONFIG = 0 and WALL SWITCH = YES) sets it, otherwise the field panel or BMS commands it. With DI2 CONFIG = 3 an ON/OFF switch on DI 2 sets ON.OFF (BO 28); when off, an occupancy sensor on DI 3 can turn the unit on for PIR TIME (OFF OVRD, BO 25).

Sensors & values from the BMS

If VALVE TYPE or STAGE TYPE is 3 (one element heats or cools), HEAT.COOL (BO 5) must be set by the field panel unless DI 6 is configured as a heat/cool switch.

Network setup

Watch out for

Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) BACnet objects

Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.

Note: the source document has no read/write column, so access here is inferred from the object type (inputs read-only, values writable). Confirm on the live controller before writing.

108 of 108 shown
Type
Access
Show
Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) BACnet Points List
DescriptionStates
AO1CTLR ADDRESSController MS/TP addressCommand
AO2APPLICATIONApplication number running in the controllerCommand
AO3AOV 1 FN LOWFan output voltage for low speedVCommand
AImin4ROOM TEMPRoom temperature from the room unit°FRead
BOmin5HEAT.COOLCurrent heating/cooling modeCommand0=COOL, 1=HEAT
AOmin6OCC CLG STPTOccupied cooling setpoint°FCommand
AOmin7OCC HTG STPTOccupied heating setpoint°FCommand
AO8UOC CLG STPTUnoccupied cooling setpoint°FCommand
AO9UOC HTG STPTUnoccupied heating setpoint°FCommand
AO10AOV 1 FN MEDFan output voltage for medium speedVCommand
AO11RM STPT MINLowest setpoint allowed from the room unit°FCommand
AO12RM STPT MAXHighest setpoint allowed from the room unit°FCommand
AI13RM STPT DIALSetpoint from the room unit dial or keypad°FRead
BO14STPT DIALUse the room unit setpoint dialCommand0=NO, 1=YES
AO15HTG 1 ONHeating loop % that turns stage 1 on%Command
AO16HTG 2 ONHeating loop % that turns stage 2 on%Command
AO17HTG 3 ONHeating loop % that turns stage 3 on%Command
BO18WALL SWITCHWall switch connected to DI 2Command0=NO, 1=YES
BI19DI OVRD SWRoom unit night override buttonRead0=OFF, 1=ON
AO20OVRD TIMENight override durationhCommand
BO21UNOCC OVRDUnoccupied override statusCommand0=OCC, 1=UNOCC
AO22CLG 1 ONCooling loop % that starts cooling stage 1%Command
AO23CLG 2 ONCooling loop % that starts cooling stage 2%Command
AO24CLG 3 ONCooling loop % that turns stage 3 on%Command
BO25OFF OVRDTemporary ON from the occupancy sensor while switched offCommand0=OFF, 1=ON
AOmin26FAN SPEEDFan speed (0 off, 1 low, 2 medium, 3 high)Command
AOmin27ALARMAlarm level (0 none to 3 high)Command
BOmin28ON.OFFController on/off stateCommand0=OFF, 1=ON
BOmin29OCC.UNOCCOccupied/unoccupied modeCommand0=OCC, 1=UNOCC
AO30AOV 2 CLOSEHeating valve voltage at closedVCommand
AO31AOV 2 OPENHeating valve voltage at openVCommand
AO32AOV 3 CLOSECooling valve voltage at closedVCommand
AO33AOV 3 OPENCooling valve voltage at openVCommand
AO34SWITCH DBANDTemperature deadband for heat/cool switchover°FCommand
AO35VALVE TYPEFloating valve use (heating, cooling or both)Command
AO36MTR SETUPMotor enable/reverse setup (additive code)Command
AO37MTR TIMINGDamper motor full-stroke timesCommand
AO38VALVE COMDReheat valve command%Command
AO39VALVE POSReheat valve position (calculated)%Command
AO40DO DIR. REVDigital output direction reverse (additive code)Command
BO41DO 1Digital output 1Command0=OFF, 1=ON
BO42DO 2Digital output 2Command0=OFF, 1=ON
BO43DO 3Digital output 3Command0=OFF, 1=ON
BO44FAN HI DO 4Fan high speed output (DO 4)Command0=OFF, 1=ON
BO45FAN MED DO 5Fan medium speed output (DO 5)Command0=OFF, 1=ON
BO46FAN LO DO 6Fan low speed output (DO 6)Command0=OFF, 1=ON
BI47DI 2Digital input 2Read0=OFF, 1=ON
BI48PIR DI 3Occupancy sensor input (DI 3)Read0=OFF, 1=ON
BI49DI 4Digital input 4Read0=OFF, 1=ON
BI50DI 5Digital input 5Read0=OFF, 1=ON
BI51DI 6Digital input 6Read0=OFF, 1=ON
AI52AI 3Spare analog input 3%Read
AI53AI 4Spare analog input 4°FRead
AI54AUX TMP AI5Auxiliary temperature sensor (AI 5)°FRead
AO55FAN AOV 1Variable speed fan output (AOV 1)VCommand
AO56STG OFF DLAYDelay before stages turn off with the fan offminCommand
AOmin57HTG AOV 2Heating valve output (AOV 2)VCommand
AOmin58CLG AOV 3Cooling valve output (AOV 3)VCommand
AO59TEMP CONFIGRoom temperature source selectCommand
AO60AOV 1 FN ALMFan output voltage in high-level alarmVCommand
AO61AOV 1 FN OFFFan output voltage when offVCommand
AO62AOV 1 FN HIFan output voltage for high speedVCommand
AO63CLG P GAINCooling loop proportional gainCommand
AO64CLG I GAINCooling loop integral gainCommand
AO65CLG D GAINCooling loop derivative gainCommand
AO66CLG BIASCooling loop bias%Command
AO67HTG P GAINHeating loop proportional gainCommand
AO68HTG I GAINHeating loop integral gainCommand
AO69HTG D GAINHeating loop derivative gainCommand
AO70HTG BIASHeating loop bias%Command
AO71PIR ENABLEOccupancy sensor function selectionCommand
AO72PIR TIMEOccupancy sensor override timeminCommand
AO73DI2 CONFIGDI 2 function (spare, safety or on/off switch)Command
AO74DI6 CONFIGDI 6 function (spare, safety or heat/cool switch)Command
AO75AIDI5 CONFIGAI/DI 5 function (spare, safety or aux sensor)Command
AO76C STG TIMEMinimum time between cooling stagesminCommand
AO77H STG TIMEMinimum time between heating stagesminCommand
AO78CTL TEMPTemperature the controller is controlling to°FCommand
AO79CLG LOOPOUTCooling loop output%Command
AO80HTG LOOPOUTHeating loop output%Command
AO81SAFETY SET 1Alarm level raised by DI 5Command
AO82SAFETY SET 2Alarm level raised by DI 2Command
AO83SAFETY SET 3Alarm level raised by DI 6Command
AO84FAN SPD CNTNumber of fan speedsCommand
AO85SWITCH LIMITLoop output below which mode may switch%Command
AO86SWITCH TIMEMinimum time before heat/cool switchoverminCommand
AO87FAN OVRD TIMManual fan speed override timeminCommand
AO88STAGE COUNTNumber of electric heat stagesCommand
AO89STAGE TYPEUse of DO 1-3 stages (heating, cooling or both)Command
BO90HTG MOD FANHeating loop modulates fan speedCommand0=NO, 1=YES
AO91HTG FAN SPDFan speed in heating when not modulatedCommand
AO92CTL STPTActive control setpoint°FCommand
AO93FAN LO ONLoop % that starts low fan speed%Command
AO94FAN MED ONLoop % that starts medium fan speed%Command
AO95FAN HI ONLoop % that starts high fan speed%Command
AO96CAL TIMERHours between automatic calibrationshCommand
BO97FAN MODESeries fan CONST (fixed) or VARI (variable) in occupied modeCommand0=MANUAL, 1=AUTO
AO98LOOP TIMEControl loop intervalsCommand
AO99ERROR STATUSController error status codeCommand
BO102DO 7Digital output 7Command0=OFF, 1=ON
BO103DO 8Digital output 8Command0=OFF, 1=ON
AO107RMTMP OFFSETRoom temperature calibration offset°FCommand
AO120DEW POINTRoom dew point°FCommand
AO121STPT SPANRoom unit setpoint adjustment span°FCommand
AO124SENSOR SELRoom unit / sensor select code (additive)Command
AI125RM CO2Room CO2ppmRead
AI126RM RHRoom relative humidity%Read
BO127PPCL STATEPPCL program loaded or emptyCommand0=EMPTY, 1=LOADED
Object ID lookup: Siemens PTEC Unit Conditioner Multi-Speed Fan 6611 point IDs by name

Integration notes

Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. This list is provided as-is for reference only and may contain mistakes — confirming it before you write, map or commission anything is up to you (terms). Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.

Questions about the Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)

How many BACnet points does the Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) have?

This list has 108 BACnet objects: 7 analog inputs, 77 analog outputs, 6 binary inputs, 18 binary outputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) BACnet points are writable?

95 of the 108 objects accept a write. Points marked Command have a priority array: a write holds until it is released, so release it back to automatic when you are done. The source has no read/write column, so this is inferred from object type.

Where is the official Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor) BACnet documentation?

The source is BACnet PTEC Controller Unit Conditioner Heating and Cooling Controller with Multi-Speed Fan, ON/OFF Switch, and Occupancy Sensor, Application 6611, Application Note (140-1178), revision 2016-12-22, published free by Siemens at https://sid.siemens.com/api/khub/documents/Pd3DOqYbXdMQ4ii6GhUhyA/content.

What are the minimum BACnet points to integrate the Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)?

Start with BO 29 OCC.UNOCC (OCC = occupied, UNOCC = unoccupied); AO 6 OCC CLG STPT (Occupied cooling setpoint, °F); AO 7 OCC HTG STPT (Occupied heating setpoint, °F); BO 28 ON.OFF (Controller on/off state); BO 5 HEAT.COOL (Current mode: HEAT or COOL); AI 4 ROOM TEMP (Space temperature); AO 26 FAN SPEED (Fan speed (0 off to 3 high)); AO 57 HTG AOV 2 (Heating valve output, V); AO 58 CLG AOV 3 (Cooling valve output, V); AO 27 ALARM (Alarm level (0 none to 3 high)).

How do I enable BMS control of the Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)?

Occupancy is OCC.UNOCC (BO 29): a wall switch on DI 2 (DI2 CONFIG = 0 and WALL SWITCH = YES) sets it, otherwise the field panel or BMS commands it. With DI2 CONFIG = 3 an ON/OFF switch on DI 2 sets ON.OFF (BO 28); when off, an occupancy sensor on DI 3 can turn the unit on for PIR TIME (OFF OVRD, BO 25).

Can the BMS supply sensor values to the Siemens BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)?

If VALVE TYPE or STAGE TYPE is 3 (one element heats or cools), HEAT.COOL (BO 5) must be set by the field panel unless DI 6 is configured as a heat/cool switch.

How do I check these points on the real BACnet PTEC Unit Conditioner - Application 6611 (Heating and Cooling with Multi-Speed Fan, ON/OFF Switch and Occupancy Sensor)?

Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.

More Siemens BACnet points lists

Source: BACnet PTEC Controller Unit Conditioner Heating and Cooling Controller with Multi-Speed Fan, ON/OFF Switch, and Occupancy Sensor, Application 6611, Application Note · 140-1178 · rev. 2016-12-22. Object names, instances and units are reproduced as published; descriptions are our own.