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Heat pump / fan coil controller (zone sensor interaction subset) · BACnet points list

Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points BACnet points list

Updated 4 November 2026

Short answer

This short list shows which UC400-B / Symbio 500 objects the Trane commercial or residential touch-screen programmable zone sensor reads and overrides on fan coil, blower coil, unit ventilator and staged WSHP units. It covers space temperature, setpoints and offset, heat/cool mode request and status, occupancy request, fan configuration, fan speed and capacity status. The sensor and controller talk BACnet MS/TP.

This page lists 14 BACnet objects for the Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points — 8 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Trane’s own free documentation, linked below.

Manufacturer
Trane
Model
UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points
Equipment
Heat pump / fan coil controller (zone sensor interaction subset)
Equipment type
Heat pumps
BACnet objects
14 (8 writable)
Transport
BACnet MS/TP
Firmware
Not stated
Also known as
UC400-B, Symbio 500, Symbio 400-B, X13790993001, SEN02587, X13790992001, BAS-SVP080A
Source document
Touch Screen Programmable Zone Sensor Integration Guide (Tracer UC400-B, Symbio 400-B/500/700/800, ReliaTel) · BAS-SVP080A-EN · rev. 2023-08
Download CSV 14 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 Trane’s current documentation and the live device before use. Not official Trane information. Terms of use.

BMS integration notes: Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points

Integration in brief

Use a BMS mainly for monitoring, trending and alarms when the touch-screen sensor runs the unit. The sensor owns occupancy, mode, fan and setpoint commands; read the mode status, fan speed and capacity points, and only write Space Temperature BAS (priority 5 or higher) if the BMS must supply space temperature.

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
MV 6Occupancy RequestOccupancy request (1=Occ, 2=Unocc, 3=Bypass, 4=Standby)Write
MV 4Heat Cool Mode Request BASHeat/cool mode request (1=Auto)Write
BV 1Supply Fan Configuration CommandFan mode: Inactive = Auto, Active = OnWrite
AV 27Space Temperature Setpoint BASSpace temperature setpointWrite
AV 14Space Temperature BASSpace temperature in use by the unitWrite
MV 5Heat Cool Mode Status BASActual heat/cool modeRead
AI 73Supply Fan Speed StatusSupply fan speed, %Read
AV 76Cooling Capacity StatusMechanical cooling, %Read
AV 74Heat Primary Capacity StatusPrimary heating, %Read

Enable & remote start

The touch-screen sensor controls the unit: at power-up it sets Out_Of_Service on the occupancy, mode, fan and setpoint objects and writes them at priority 7. The guide recommends leaving control with the sensor and using the BMS for monitoring.

Sensors & values from the BMS

Space Temperature BAS normally comes from the sensor; a BMS can command it at priority 5 or higher. Space Temperature Local is the unit's hard-wired sensor.

Network setup

Watch out for

Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points 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.

14 of 14 shown
Type
BinaryMulti-state
Access
Show
Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points BACnet Points List
DescriptionStates
AVmin14Space Temperature BASSpace temperature sent by the touch-screen sensor, -40-150 °F°F/°CWrite
AI1Space Temperature Local (TempRemSrc)Hard-wired space temperature at the unit, -40-200 °F°F/°CRead
AV23Unoccupied Cooling SetpointUnoccupied cooling setpoint, 50-90 °F (sensor default 85 °F)°F/°CWrite
AV24Unoccupied Heating SetpointUnoccupied heating setpoint, 50-90 °F (sensor default 60 °F)°F/°CWrite
AVmin27Space Temperature Setpoint BASSpace setpoint from the sensor, 50-90 °F (default 72.5 °F)°F/°CWrite
AV30Occupied OffsetHalf the heat/cool setpoint spread, 1-5 °F (default 1.5 °F)°F/°CWrite
AImin73Supply Fan Speed StatusSupply fan speed, 0-100 %%Read
MVmin4Heat Cool Mode Request BASHeat/cool mode request written by the sensor (default Auto)Write1=Auto, 2=Heat, 3=Morning Warm-up, 4=Cool, 5=Night Purge, 6=Precool, 7=Off, 8=Test, 9=Emergency Heat, 10=Fan Only, 11=Free Cool, 12=Ice Making, 13=Max Heat, 14=Economy Mode, 15=Dehumidifying, 16=Calibrate
MVmin5Heat Cool Mode Status BASActual heat/cool mode of the unitRead1=Auto, 2=Heat, 3=Morning Warm-up, 4=Cool, 5=Night Purge, 6=Precool, 7=Off, 8=Test, 9=Emergency Heat, 10=Fan Only, 11=Free Cool, 12=Ice Making, 13=Max Heat, 14=Economy Mode, 15=Dehumidifying, 16=Calibrate
MVmin6Occupancy RequestOccupancy request written by the sensor (default Occupied)Write1=Occupied, 2=Unoccupied, 3=Occupied Bypass, 4=Occupied Standby
BVmin1Supply Fan Configuration CommandFan mode: auto or continuous on (default Auto)WriteInactive=Auto, Active=On
AVmin76Cooling Capacity StatusMechanical cooling, 0-100 %; sensor shows On when > 0%Read
AVmin74Heat Primary Capacity StatusPrimary heating, 0-100 %; sensor shows On when > 0%Read
AV75Heat Secondary Capacity StatusSecondary heating, 0-100 %; sensor shows On when > 0%Read
Object ID lookup: Trane UC400-B / Symbio 500 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 UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points 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 Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points

How many BACnet points does the Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points have?

This list has 14 BACnet objects: 2 analog inputs, 8 analog values, 1 binary value, 3 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points BACnet points are writable?

8 of the 14 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 Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points BACnet documentation?

The source is Touch Screen Programmable Zone Sensor Integration Guide (Tracer UC400-B, Symbio 400-B/500/700/800, ReliaTel) (BAS-SVP080A-EN), revision 2023-08, published free by Trane at https://elibrary.tranetechnologies.com/public/commercial-hvac/Literature/Integration/BAS-SVP080A-EN_08302023.pdf.

What are the minimum BACnet points to integrate the Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points?

Start with MV 6 Occupancy Request (Occupancy request (1=Occ, 2=Unocc, 3=Bypass, 4=Standby)); MV 4 Heat Cool Mode Request BAS (Heat/cool mode request (1=Auto)); BV 1 Supply Fan Configuration Command (Fan mode: Inactive = Auto, Active = On); AV 27 Space Temperature Setpoint BAS (Space temperature setpoint); AV 14 Space Temperature BAS (Space temperature in use by the unit); MV 5 Heat Cool Mode Status BAS (Actual heat/cool mode); AI 73 Supply Fan Speed Status (Supply fan speed, %); AV 76 Cooling Capacity Status (Mechanical cooling, %); AV 74 Heat Primary Capacity Status (Primary heating, %).

How do I enable BMS control of the Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points?

The touch-screen sensor controls the unit: at power-up it sets Out_Of_Service on the occupancy, mode, fan and setpoint objects and writes them at priority 7. The guide recommends leaving control with the sensor and using the BMS for monitoring.

Can the BMS supply sensor values to the Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points?

Space Temperature BAS normally comes from the sensor; a BMS can command it at priority 5 or higher. Space Temperature Local is the unit's hard-wired sensor.

How do I check these points on the real UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points?

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 Trane BACnet points lists

Source: Touch Screen Programmable Zone Sensor Integration Guide (Tracer UC400-B, Symbio 400-B/500/700/800, ReliaTel) · BAS-SVP080A-EN · rev. 2023-08. Object names, instances and units are reproduced as published; descriptions are our own.