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Fan coil, blower coil and unit ventilator controller · BACnet points list
Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator BACnet points list
Updated 6 November 2026
The Symbio 400-B/500 is Trane's programmable unit controller, BTL listed as a B-BC. For fan coil, blower coil and unit ventilator applications it exposes about 115 objects: local and BAS sensor values, occupancy, heat/cool mode and fan speed requests, valve, damper and heat outputs, setpoint limits and diagnostics. Symbio UI sets the protocol and chooses BAS or local per sensor and setpoint.
This page lists 116 BACnet objects for the Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator — 62 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
- Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator
- Equipment
- Fan coil, blower coil and unit ventilator controller
- Equipment type
- VAV boxes & fan coils
- BACnet objects
- 116 (62 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Also known as
- Symbio 400-B, Symbio 400B, Symbio 500, Symbio fan coil, Symbio blower coil, Symbio unit ventilator, BAS-SVP060A-EN
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 Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator
Set the rotary address, then use Symbio UI (USB, http://198.80.18.1) BAS Control Selection to pick BAS or Local for each sensor and setpoint. Schedule with MV 6 Occupancy Request, write AV 27 Space Temperature Setpoint BAS, MV 4 Heat Cool Mode Request and MV 8 fan speed, and refresh any BAS sensor objects at least every 15 minutes.
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.
| Object | Name | Why | Access |
|---|---|---|---|
| MV 6 | Occupancy Request | Occupancy command from the BMS schedule | Write |
| MV 4 | Heat Cool Mode Request | Heat/cool mode command | Write |
| MV 8 | Supply Fan Speed BAS | Fan speed command (1 = Auto) | Write |
| AV 27 | Space Temperature Setpoint BAS | Space setpoint from the BMS | Write |
| BV 2 | Reset Diagnostic Request | Reset diagnostics (self-clears) | Write |
| MV 7 | Occupancy Status | Confirms the occupancy in effect | Read |
| MV 5 | Heat Cool Mode Status | Heat/cool mode in effect | Read |
| BI 5 | Supply Fan Status | Fan running (1 = on) | Read |
| AV 59 | Space Temperature Active | Space temperature the unit controls to | Read |
| AI 4 | Discharge Air Temperature | Discharge air temperature | Read |
Enable & remote start
The BAS controls the unit by writing values and putting points in or out of service. BAS Control Selection in Symbio UI chooses BAS or Local per sensor and setpoint. MV 9 Emergency Override BAS shuts the unit down for any value other than 1 = Normal.
Heartbeat & communication loss
BAS-supplied sensor objects (Space Temperature BAS, Outdoor Air Temperature BAS, Space Humidity BAS, Entering Water Temperature BAS) must be rewritten at least every 15 minutes. If no write is seen in time the object goes to fault and the unit falls back to its own sensor; at power-up they start in fault until written.
Sensors & values from the BMS
Put the BAS sensor objects in service (they are out of service by default), then write AV 14 Space Temperature BAS, AV 1 Outdoor Air Temperature BAS, AV 2 Space Humidity BAS, AV 4 Entering Water Temperature BAS or AV 112 Space CO2 Concentration BAS. The matching Active objects (AV 59, AV 3, AV 6, AV 5, AV 113) show the value in use.
Network setup
- Three rotary switches set the BACnet MAC address and Device ID; each controller on a link needs a unique value.
- Symbio UI (USB only, http://198.80.18.1) sets protocol, IP, identification and system units; saving restarts the controller.
- Tracer SC+ sets a software Device ID automatically during discovery; third-party systems must set it themselves.
- System units (IP/SI) chosen in Symbio UI change the units sent over BACnet.
Watch out for
- BAS sensor objects are out of service by default; put them in service before writing.
- BV 2 Reset Diagnostic Request clears all diagnostics except Filter Change Required; BV 12 resets the filter timer. Both self-clear.
- BO 4, BO 6 and BO 7 change meaning with the unit type (hydronic vs DX/heat pump vs electric heat).
- Only the points for the unit's options are present.
Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AI | 1 | Space Temperature Local | Local zone temperature or return air temperature | °F | Read | |
| AI | 2 | Space Temperature Setpoint Local | Local zone sensor setpoint | °F | Read | |
| AI | 3 | Space Humidity Local | Local relative humidity sensor value | % | Read | |
| AImin | 4 | Discharge Air Temperature | Discharge air temperature from equipment | °F | Read | |
| AI | 5 | Entering Water Temperature Local | Local sensor entering water temperature | °F | Read | |
| AI | 8 | Outside Air Temperature Local | Local outside air temperature sensor | °F | Read | |
| AI | 20 | Face and Bypass Damper Position Status | Face and bypass damper position, % of stroke | Read | ||
| AI | 21 | Space CO2 Concentration Local | Local carbon dioxide concentration | ppm | Read | |
| AO | 1 | Outdoor Air Damper Position | Analog outdoor air damper output command | Read | ||
| AO | 2 | Chilled Water Valve Command | Analog chilled water valve command 0% closed | Read | ||
| AO | 3 | Heating Valve Command | Analog heating valve output command 0% closed | Read | ||
| AO | 4 | Electric Heat Command | Analog electric heat output command | Read | ||
| AV | 1 | Outdoor Air Temperature BAS | Communicated outdoor air temperature | °F | Write | |
| AV | 2 | Space Humidity BAS | Communicated space relative humidity | % | Write | |
| AV | 3 | Outdoor Air Temperature Active | Outdoor air temperature in use | °F | Read | |
| AV | 4 | Entering Water Temperature BAS | Communicated entering water temperature | °F | Write | |
| AV | 5 | Entering Water Temperature Active | Actively used entering water temperature | °F | Read | |
| AV | 6 | Space Humidity Active | Actively used space relative humidity | % | Read | |
| AV | 8 | Economizer Minimum Position Setpoint BAS | Communicated value for minimum economizer position setpoint | % | Write | |
| AV | 9 | Fan Off Delay Time | Fan off delay time | seconds | Write | |
| AV | 10 | Compressor Enable BAS | Compressor capacity limit; 0 % disables compressors | % | Write | |
| AV | 12 | Filter Runtime Hours Setpoint | Fan run hours before a filter maintenance diagnostic; 0 disables | hours | Write | |
| AV | 14 | Space Temperature BAS | Communicated space temperature | °F | Write | |
| AV | 16 | Economizer Request | Economizer position request for manual override | % | Write | |
| AV | 18 | Cool Valve Request | Cool valve position request for manual override | % | Write | |
| AV | 19 | DX Cool Request | DX compressor output request for manual override | % | Write | |
| AV | 20 | Heat Valve Request | Heat valve position request for manual override | % | Write | |
| AV | 21 | Discharge Air Temperature Low Limit Setpoint | Discharge air low limit; trips freeze protection after 3 min | °F | Write | |
| AV | 22 | Electric Heat Request | Electric heat request for manual override | % | Write | |
| AV | 23 | Unoccupied Cooling Setpoint | Cooling setpoint used in unoccupied mode | °F | Write | |
| AV | 24 | Unoccupied Heating Setpoint | Heating setpoint used in unoccupied mode | °F | Write | |
| AVmin | 27 | Space Temperature Setpoint BAS | Communicated space temperature setpoint | °F | Write | |
| AV | 28 | Space Temperature Setpoint Active | The currently used space temperature setpoint | °F | Read | |
| AV | 29 | Freeze Avoidance Setpoint | Freeze avoidance setpoint | °F | Write | |
| AV | 30 | Occupied Offset | Offset from the setpoint for occupied heat/cool setpoints | °F | Write | |
| AV | 31 | Economizer Minimum Position Setpoint Local | Minimum outside air damper position during occupied mode | % | Write | |
| AV | 32 | Economizer Enable Minimum Outdoor Air Temperature Setpoint | Economizing is allowed only above this outdoor air temperature | °F | Write | |
| AV | 33 | Occupied Bypass Time | Occupied bypass time remaining | minutes | Read | |
| AV | 34 | Standby Offset | Offset from the setpoint for standby heat/cool setpoints | °F | Write | |
| AV | 35 | Exhaust fan Enable Position | Economizer position that turns the exhaust fan on (default 10 %) | % | Write | |
| AV | 36 | Space Dehumidification Setpoint BAS | Space humidity setpoint for dehumidification | % | Write | |
| AV | 37 | Space Temperature Setpoint Default | Fallback space setpoint when no valid setpoint exists | °F | Write | |
| AV | 38 | Filter Runtime Hours | Fan run hours since the filter timer was reset | hours | Read | |
| AV | 58 | Standby Minimum Position Setpoint | Minimum position in occupied standby mode | % | Write | |
| AVmin | 59 | Space Temperature Active | The currently used space temperature | °F | Read | |
| AV | 60 | Occupied Low Fan Min Position Setpoint | Minimum position in occupied with low fan speed | % | Write | |
| AV | 63 | Supply Fan Speed Request | Supply fan speed request; below the low limit counts as off | % | Write | |
| AV | 64 | Fan Capacity Low Limit | Minimum fan speed as a fraction of maximum speed | % | Write | |
| AV | 65 | Compressor Lockout Setpoint | Outdoor air temperature that locks out the compressors | °F | Write | |
| AV | 67 | Auxiliary Heat Control Request | Auxiliary heat capacity limit; 0 % disables auxiliary heat | % | Write | |
| AV | 68 | Space Relative Humidity Offset | Dehumidification stops at setpoint minus this offset (default 8 %) | % | Write | |
| AV | 69 | Economizer Minimum Position Setpoint Active | Current minimum allowed economizer position | % | Read | |
| AV | 71 | Face and Bypass Damper Request | Face and bypass damper capacity after curve and diagnostics | % | Read | |
| AV | 73 | Supply Fan Speed Status | Supply fan speed; discrete fans show 0/33/66/100 % | % | Read | |
| AV | 74 | Heating Capacity Primary | Primary heating source heat capacity | % | Read | |
| AV | 75 | Heating Capacity Secondary | Secondary heating source heat capacity | % | Read | |
| AV | 76 | Cooling Capacity Status | Cooling source cool capacity | % | Read | |
| AV | 77 | Discharge Air Temperature Maximum Heat Limit | Heating capacity is limited to keep discharge air below this | °F | Write | |
| AV | 78 | Discharge Air Temperature Minimum Cool Limit | Cooling capacity is limited to keep discharge air above this | °F | Write | |
| AV | 81 | Electric Heat Stage 1 Fan Output | Minimum fan speed with electric heat stage 1 | % | Write | |
| AV | 82 | Electric Heat Stage 2 Fan Output | Minimum fan speed with electric heat stage 2 | % | Write | |
| AV | 87 | Cooling Setpoint High Limit | Upper limit for the cooling setpoint | °F | Write | |
| AV | 88 | Cooling Setpoint Low Limit | Lower limit for the cooling setpoint | °F | Write | |
| AV | 89 | Heating Setpoint High Limit | Upper limit for the heating setpoint | °F | Write | |
| AV | 90 | Heating Setpoint Low Limit | Lower limit for the heating setpoint | °F | Write | |
| AV | 96 | Discharge Air Temperature Design Cool Limit | Fan speeds up to hold discharge air above this in cooling | °F | Write | |
| AV | 97 | Discharge Air Temperature Design Heat Limit | Fan speeds up to hold discharge air below this in heating | °F | Write | |
| AV | 108 | DCV Minimum Economizer Position at Max Fan Speed | Damper position with fan speed at maximum | % | Write | |
| AV | 109 | DCV Minimum Economizer Position at Min Fan Speed | Damper position with fan speed at minimum | % | Write | |
| AV | 110 | Space CO2 Limit | CO2 Maximum Setpoint | ppm | Write | |
| AV | 111 | Space CO2 Low Limit | CO2 Minimum Setpoint | ppm | Write | |
| AV | 112 | Space CO2 Concentration BAS | BAS communicated CO2 value | ppm | Write | |
| AV | 113 | Space CO2 Concentration Active | Arbitrated BAS and Local CO2 value | ppm | Read | |
| BI | 1 | Occupancy Input | Normally open input | Read | 0=Occupied, 1=Unoccupied | |
| BI | 2 | Condensate Overflow Input | Normally closed input | Read | 0=Overflow, 1=Normal | |
| BI | 3 | Low Coil Temperature Detection | Normally closed input | Read | 0=Low temperature, 1=Normal | |
| BI | 4 | Frost Detection Input | Normally closed input | Read | ||
| BImin | 5 | Supply Fan Status | Normally open input | Read | 0=Off, 1=On | |
| BO | 2 | Exhaust Fan Start Stop Command | Exhaust fan start/stop output | Read | 0=Off, 1=Running | |
| BO | 4 | Chilled Water Valve Command Binary | Binary chilled water command | Read | ||
| BO | 5 | Compressor 2 Command | Compressor 2 command | Read | ||
| BO | 6 | Heating Valve Command Binary | Binary heating valve output | Read | ||
| BO | 7 | Reversing Valve Output | Reversing valve output | Read | On=Cooling, Off=Heating | |
| BO | 8 | Outside Air Damper Binary Output | Binary outdoor air damper output command | Read | ||
| BV | 1 | Supply Fan Configuration Command | Occupied fan mode: cycle with capacity or run continuously | Write | ||
| BVmin | 2 | Reset Diagnostic Request | Reset all diagnostics except filter; self-clears | Write | 1=Reset | |
| BV | 3 | Diagnostic: Discharge Air Temperature Low Limit | Freeze protection: discharge air below low limit | Read | 0=Inactive, 1=Active | |
| BV | 4 | Diagnostic: Condensate Overflow | Condensate overflow diagnostic (latching) | Read | 0=Inactive, 1=Active | |
| BV | 5 | Diagnostic: Low Coil Temperature Detect | Low coil temperature detection diagnostic | Read | 0=Inactive, 1=Active | |
| BV | 6 | Diagnostic: Low Air Flow- Supply Fan Failure | Low airflow / supply fan failure diagnostic | Read | ||
| BV | 7 | Diagnostic: Freeze Avoidance Mode | Freeze avoidance active (hydronic units) | Read | 0=Inactive, 1=Active | |
| BV | 8 | Diagnostic: Filter Change Required | Filter change required (fan run hours) | Read | 0=Inactive, 1=Active | |
| BV | 10 | Exhaust Fan Enable | Exhaust fan enable | Write | 0=Disable, 1=Enable | |
| BV | 11 | Dehumidification Status | Dehumidification active | Read | 0=Not active, 1=Dehumidification active | |
| BV | 12 | Filter Timer Reset Request | Reset the filter runtime timer; self-clears | Write | 1=Reset | |
| BV | 13 | Reversing Valve Request | Reversing valve request for manual override | Write | ||
| BV | 14 | Predicted Occupied Heat Cool Mode Status | Predicted heat/cool mode for the next occupied period | Read | ||
| BV | 15 | Demand Control Ventilation Enable | Enables Demand Control Ventilation | Write | ||
| MI | 1 | Supply Fan Speed Local | Local fan speed setting | Read | ||
| MI | 2 | Timed Override Status | Timed override request from zone sensor | Read | ||
| MI | 3 | Communication Status | Communication status | Read | 1=Comm Up, 2=Comm Down, 3=No Parent Configured | |
| MI | 4 | IMC Status | ECM fan module (IMC) status | Read | 1=ok, 2=commLoss, 3=newConfig, 4=hwMismatch, 5=swMismatch, 6=hwVersion, 7=swVersion, 8=nvDataMismatch, 9=dupRotarySwitch, 10=extraDevice, 11=rotarySwitchNotFound | |
| MO | 1 | Supply Fan Speed BAS | Fan speed output (1-, 2- or 3-speed fan) | Read | 2=Off, 3=Low, 4=Medium, 5=High (1-speed fan: 2/5; 2-speed fan: 2/3/5) | |
| MV | 1 | Supply Fan Speed Active | Active supply fan speed for discrete fan speed | Read | ||
| MV | 2 | Cooling Fan Speed Default | Do not use (per the guide) | Write | ||
| MVmin | 4 | Heat Cool Mode Request | Heat/cool mode command | Write | 1=Auto, 2=Heat, 3=Morning warm-up, 4=Cool, 5=Night Purge (treated as Auto), 6=Pre-Cool, 7=Off, 8=Test (status only), 9=Emergency Heat (treated as Auto), 10=Fan Only (economizer at min), 11=Free Cool | |
| MVmin | 5 | Heat Cool Mode Status | Actual heat/cool mode status | Read | ||
| MVmin | 6 | Occupancy Request | Occupancy command | Write | 1=Occupied, 2=Unoccupied, 3=Occupied Bypass, 4=Occupied Standby, 5=Auto | |
| MVmin | 7 | Occupancy Status | Occupancy in effect | Read | 1=Occupied, 2=Unoccupied, 3=Occupied Bypass, 4=Occupied Standby | |
| MVmin | 8 | Supply Fan Speed BAS | Fan speed command from the BAS | Write | 1=Auto, 2=Off, 3=Low, 4=Medium, 5=High | |
| MV | 9 | Emergency Override BAS | Emergency override; anything but Normal shuts the unit down | Write | 1=Normal, 2=Pressurize, 3=Depressurize, 4=Purge, 5=Shutdown, 6=Fire (all but Normal treated as shutdown) | |
| MV | 10 | Economizer Airside Enable BAS | Airside economizer enable/disable/auto from the BAS | Write | 1=Disabled, 2=Enabled, 3=Auto | |
| MV | 11 | Number of Fan Speeds | Number of fan speeds configured | Write | 1=Zero, 2=One, 3=Two, 4=Three, 5=Variable Speed | |
| MV | 13 | Outdoor Air Damper Status | Outdoor air damper position status | Read | 1=At or Below Minimum Position, 2=Above Minimum Position, 3=Economizer Not Present | |
| MV | 22 | Fan Operating Mode Request | ECM fan operating mode: energy efficient or acoustical | Write | 1=Energy Efficient Mode, 2=Acoustical Mode | |
| MV | 23 | First Stage Compressor Minimum Fan Speed | Minimum fan speed with the first compressor stage on | Write | 1=Low, 2=Medium, 3=High (default) |
No points match these filters.
Object ID lookup: Trane Symbio 400-B/500 FC/BC/UV point IDs by name
AI1Space Temperature LocalAI2Space Temperature Setpoint LocalAI3Space Humidity LocalAI4Discharge Air TemperatureAI5Entering Water Temperature LocalAI8Outside Air Temperature LocalAI20Face and Bypass Damper Position StatusAI21Space CO2 Concentration LocalAO1Outdoor Air Damper PositionAO2Chilled Water Valve CommandAO3Heating Valve CommandAO4Electric Heat CommandAV1Outdoor Air Temperature BASAV2Space Humidity BASAV3Outdoor Air Temperature ActiveAV4Entering Water Temperature BASAV5Entering Water Temperature ActiveAV6Space Humidity ActiveAV8Economizer Minimum Position Setpoint BASAV9Fan Off Delay TimeAV10Compressor Enable BASAV12Filter Runtime Hours SetpointAV14Space Temperature BASAV16Economizer RequestAV18Cool Valve RequestAV19DX Cool RequestAV20Heat Valve RequestAV21Discharge Air Temperature Low Limit SetpointAV22Electric Heat RequestAV23Unoccupied Cooling SetpointAV24Unoccupied Heating SetpointAV27Space Temperature Setpoint BASAV28Space Temperature Setpoint ActiveAV29Freeze Avoidance SetpointAV30Occupied OffsetAV31Economizer Minimum Position Setpoint LocalAV32Economizer Enable Minimum Outdoor Air Temperature SetpointAV33Occupied Bypass TimeAV34Standby OffsetAV35Exhaust fan Enable PositionAV36Space Dehumidification Setpoint BASAV37Space Temperature Setpoint DefaultAV38Filter Runtime HoursAV58Standby Minimum Position SetpointAV59Space Temperature ActiveAV60Occupied Low Fan Min Position SetpointAV63Supply Fan Speed RequestAV64Fan Capacity Low LimitAV65Compressor Lockout SetpointAV67Auxiliary Heat Control RequestAV68Space Relative Humidity OffsetAV69Economizer Minimum Position Setpoint ActiveAV71Face and Bypass Damper RequestAV73Supply Fan Speed StatusAV74Heating Capacity PrimaryAV75Heating Capacity SecondaryAV76Cooling Capacity StatusAV77Discharge Air Temperature Maximum Heat LimitAV78Discharge Air Temperature Minimum Cool LimitAV81Electric Heat Stage 1 Fan OutputAV82Electric Heat Stage 2 Fan OutputAV87Cooling Setpoint High LimitAV88Cooling Setpoint Low LimitAV89Heating Setpoint High LimitAV90Heating Setpoint Low LimitAV96Discharge Air Temperature Design Cool LimitAV97Discharge Air Temperature Design Heat LimitAV108DCV Minimum Economizer Position at Max Fan SpeedAV109DCV Minimum Economizer Position at Min Fan SpeedAV110Space CO2 LimitAV111Space CO2 Low LimitAV112Space CO2 Concentration BASAV113Space CO2 Concentration ActiveBI1Occupancy InputBI2Condensate Overflow InputBI3Low Coil Temperature DetectionBI4Frost Detection InputBI5Supply Fan StatusBO2Exhaust Fan Start Stop CommandBO4Chilled Water Valve Command BinaryBO5Compressor 2 CommandBO6Heating Valve Command BinaryBO7Reversing Valve OutputBO8Outside Air Damper Binary OutputBV1Supply Fan Configuration CommandBV2Reset Diagnostic RequestBV3Diagnostic: Discharge Air Temperature Low LimitBV4Diagnostic: Condensate OverflowBV5Diagnostic: Low Coil Temperature DetectBV6Diagnostic: Low Air Flow- Supply Fan FailureBV7Diagnostic: Freeze Avoidance ModeBV8Diagnostic: Filter Change RequiredBV10Exhaust Fan EnableBV11Dehumidification StatusBV12Filter Timer Reset RequestBV13Reversing Valve RequestBV14Predicted Occupied Heat Cool Mode StatusBV15Demand Control Ventilation EnableMI1Supply Fan Speed LocalMI2Timed Override StatusMI3Communication StatusMI4IMC StatusMO1Supply Fan Speed BASMV1Supply Fan Speed ActiveMV2Cooling Fan Speed DefaultMV4Heat Cool Mode RequestMV5Heat Cool Mode StatusMV6Occupancy RequestMV7Occupancy StatusMV8Supply Fan Speed BASMV9Emergency Override BASMV10Economizer Airside Enable BASMV11Number of Fan SpeedsMV13Outdoor Air Damper StatusMV22Fan Operating Mode RequestMV23First Stage Compressor Minimum Fan Speed
Integration notes
- The guide has no read/write column; access is inferred (BAS, Request, Setpoint, Enable and Reset objects as writable; inputs, outputs, Active, Status and Diagnostic objects as read-only).
- Each point exists only on units with the matching option (the guide has a "when the point exists" column: economizer, hydronic, DX, electric heat, ECM fan, CO2 and so on).
- BO 4 is printed twice: Chilled Water Valve Command Binary, or Compressor 1 Command, depending on the unit type; the first is listed.
- BO 6 is printed twice: Heating Valve Command Binary, or Electric Heat Output 1, depending on the unit type; the first is listed.
- BO 7 is printed twice: Reversing Valve Output, or Electric Heat Output 2, depending on the unit type; the first is listed.
- MO 1 and MV 8 are both printed with the name Supply Fan Speed BAS; MV 8 carries Auto/Off/Low/Medium/High.
- MV 2 Cooling Fan Speed Default appears only in the alphabetical table, marked do not use.
- Units shown are imperial; System Units in Symbio UI switch BACnet units to SI. The guide also offers IP settings on IP-capable controllers but describes MS/TP addressing.
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 Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator 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 Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator
How many BACnet points does the Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator have?
This list has 116 BACnet objects: 8 analog inputs, 4 analog outputs, 61 analog values, 5 binary inputs, 6 binary outputs, 14 binary values, 4 multi-state inputs, 1 multi-state output, 13 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator BACnet points are writable?
62 of the 116 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 Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator BACnet documentation?
The source is Integration Guide - Symbio 400-B/500 Programmable Controller for Fan Coil, Blower Coil and Unit Ventilator (BAS-SVP060A-EN), revision October 2022, published free by Trane at https://elibrary.tranetechnologies.com/public/commercial-hvac/Literature/Integration/BAS-SVP060A-EN_10082022.pdf.
What are the minimum BACnet points to integrate the Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator?
Start with MV 6 Occupancy Request (Occupancy command from the BMS schedule); MV 4 Heat Cool Mode Request (Heat/cool mode command); MV 8 Supply Fan Speed BAS (Fan speed command (1 = Auto)); AV 27 Space Temperature Setpoint BAS (Space setpoint from the BMS); BV 2 Reset Diagnostic Request (Reset diagnostics (self-clears)); MV 7 Occupancy Status (Confirms the occupancy in effect); MV 5 Heat Cool Mode Status (Heat/cool mode in effect); BI 5 Supply Fan Status (Fan running (1 = on)); AV 59 Space Temperature Active (Space temperature the unit controls to); AI 4 Discharge Air Temperature (Discharge air temperature).
How do I enable BMS control of the Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator?
The BAS controls the unit by writing values and putting points in or out of service. BAS Control Selection in Symbio UI chooses BAS or Local per sensor and setpoint. MV 9 Emergency Override BAS shuts the unit down for any value other than 1 = Normal.
Does the Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator need a BACnet heartbeat or have a communication timeout?
BAS-supplied sensor objects (Space Temperature BAS, Outdoor Air Temperature BAS, Space Humidity BAS, Entering Water Temperature BAS) must be rewritten at least every 15 minutes. If no write is seen in time the object goes to fault and the unit falls back to its own sensor; at power-up they start in fault until written.
Can the BMS supply sensor values to the Trane Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator?
Put the BAS sensor objects in service (they are out of service by default), then write AV 14 Space Temperature BAS, AV 1 Outdoor Air Temperature BAS, AV 2 Space Humidity BAS, AV 4 Entering Water Temperature BAS or AV 112 Space CO2 Concentration BAS. The matching Active objects (AV 59, AV 3, AV 6, AV 5, AV 113) show the value in use.
How do I check these points on the real Symbio 400-B/500 Fan Coil, Blower Coil and Unit Ventilator?
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
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Trane CGWN water-cooled and CCUN condenserless scroll chillers with CH530 controls, as listed in the BCI2-C integration guide.
Also known as: BCI2-C, BCI2C, BACnet Communication Interface for Chillers, CGWN, CCUN, CGWN water-cooled scroll chiller, CCUN condenserless chiller, BAS-SVP055 - Water-cooled screw chiller BACnet interface
Trane BCI2-C for RTWD / RTUD chillers (CH530)
Trane Series R RTWD water-cooled and RTUD condenserless helical-rotary chillers with CH530 controls fitted with the BCI2-C BACnet interface.
Also known as: BCI2-C, BCI2C, BACnet Communication Interface for Chillers, RTWD, RTUD, Series R RTWD, RTWD CH530, BAS-SVP055 - Rooftop unit communication interface (IntelliPak)
Trane BCI2-I (IntelliPak)
Trane IntelliPak I and II rooftop units, IntelliPak air handlers and Commercial Self-Contained (CSC) units fitted with the BCI2-I BACnet card.
Also known as: BCI2-I, BCI2I, IntelliPak BACnet interface, BACnet Communication Interface for IntelliPak, BAS-SVP054, IntelliPak I, IntelliPak II, Commercial Self-Contained, Signature Series - Rooftop unit communication interface (ReliaTel)
Trane BCI2-R (ReliaTel)
Trane packaged rooftop units with ReliaTel controls (Voyager, Precedent, Odyssey) fitted with the BCI2-R BACnet card.
Also known as: BCI2-R, BCI2R, ReliaTel BACnet interface, BACnet Communication Interface for ReliaTel, BAS-SVP053, Voyager, Precedent, Odyssey - DOAS / outdoor air unit controller
Trane Horizon Outdoor Air Unit, Tracer UC600 program V12
Trane Horizon outdoor air units (cabinets OAB, OAD, OAG, OAK, OAN) with the Tracer UC600 controller running Horizon program version 12.
Also known as: Horizon OAU, Horizon DOAS, OAU-SVP002A, Tracer UC600 Horizon, OAB, OAD, OAG, OAK, OAN - Rooftop unit controller (zone sensor interaction subset)
Trane ReliaTel BCI-R - touch-screen zone sensor points
Trane Precedent, Voyager 2/3 and Odyssey single-zone units on ReliaTel controls with a BCI-R board, used with the commercial touch-screen programmable zone sensor.
Also known as: ReliaTel, BCI-R, RTRM, X13790994001, BAYSENS924, BAS-SVP080A - VAV box controller
Trane Symbio 210 VAV
Trane VAV terminal units with the Symbio 210 programmable controller running the factory VAV programs (space temperature, ventilation flow and flow tracking control).
Also known as: Symbio 210, Symbio210, Symbio 210 VAV controller, BAS-SVP043 - Water-source heat pump controller
Trane Symbio 400-B/500 Water-Source Heat Pump
Trane water-source heat pumps controlled by a Symbio 400-B or Symbio 500 programmable controller.
Also known as: Symbio 400-B, Symbio 400B, Symbio 500, Symbio WSHP, BAS-SVP061B-EN - Self-contained unit controller
Trane Symbio 500 Commercial Self-Contained (SWUD)
Trane commercial self-contained (SWUD) units controlled by a Symbio 500.
Also known as: Symbio 500, SWUD, Commercial Self-Contained, CSC, BAS-PTS038 - Self-contained unit controller
Trane Symbio 500 Modular Self-Contained (SCWM)
Trane modular self-contained (SCWM) units controlled by a Symbio 500.
Also known as: Symbio 500, SCWM, Modular Self-Contained, BAS-PTS037 - Split system controller
Trane Symbio 700 Odyssey
Trane Odyssey split systems controlled by a Symbio 700.
Also known as: Symbio 700, Odyssey split system, BAS-PTS005 - Rooftop unit controller
Trane Symbio 700 Precedent / Axiom
Trane Precedent packaged rooftop units and Axiom rooftop water-source heat pumps with the Symbio 700 controller.
Also known as: Symbio 700, Symbio700, Precedent rooftop, Axiom rooftop WSHP, BAS-PTS001 - Rooftop unit controller
Trane Symbio 700 Voyager 3
Trane Voyager 3 packaged rooftop air conditioners with the Symbio 700 controller.
Also known as: Voyager 3, Voyager III, Symbio 700, Symbio700, BAS-SVP066 - Rooftop unit controller (zone sensor interaction subset)
Trane Symbio 800 (SCC IntelliPak) / Symbio 700 - touch-screen zone sensor points
Trane single-zone equipment on Symbio 700 and IntelliPak units on Symbio 800 (SCC), used with the commercial touch-screen programmable zone sensor.
Also known as: Symbio 700, Symbio 800, SCC IPak, IntelliPak, X13791009001, BAYSENS800, BAS-SVP080A - Air-cooled chiller controller
Trane Symbio 800 ACRB Small (UC800)
Trane ACRB Small air-cooled chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: ACRB, ACRB Small, ACRB UC800, Symbio 800 ACRB, BAS-PTS025 - Air-cooled chiller controller
Trane Symbio 800 ACSA (UC800)
Trane ACSA air-cooled chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: ACSA, ACSA UC800, Symbio 800 ACSA, BAS-PTS026 - Water-cooled centrifugal chiller controller
Trane Symbio 800 Agility (HDWA / HDDA)
Trane Agility water-cooled centrifugal chillers (model HDWA and HDDA per the model information point) with Symbio 800 controls.
Also known as: Agility, HDWA, HDDA, Agility water-cooled chiller, Symbio 800 Agility, BAS-PTS007 - Air-cooled chiller controller
Trane Symbio 800 Ascend ACR Series C
Trane Ascend model ACR Series C air-cooled chillers with Symbio 800 controls.
Also known as: Ascend ACR, ACR Series C, Ascend air-cooled chiller, Symbio 800 Ascend ACR, BAS-PTS021 - Air-cooled chiller controller
Trane Symbio 800 Ascend ACS / ACX
Trane Ascend model ACS and ACX air-cooled scroll chillers with Symbio 800 controls.
Also known as: Ascend ACS, Ascend ACX, Ascend air-cooled chiller, Symbio 800 Ascend, BAS-PTS011 - Centrifugal chiller controller
Trane Symbio 800 CenTraVac (Duplex)
Two-compressor (duplex) Trane CenTraVac water-cooled centrifugal chillers with Symbio 800 controls.
Also known as: CenTraVac Duplex, CDHH, CDHF, Symbio 800 CenTraVac, BAS-PTS009 - Centrifugal chiller controller
Trane Symbio 800 CenTraVac (Simplex)
Single-compressor (simplex) Trane CenTraVac water-cooled centrifugal chillers with Symbio 800 controls.
Also known as: CenTraVac, CVHE, CVHF, CVHH, Symbio 800 CenTraVac, BAS-PTS009 - Centrifugal chiller controller
Trane Symbio 800 CenTraVac Simplex (UC800)
Trane CenTraVac (CTV) simplex centrifugal chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: CenTraVac, CTV, CTV-Simplex, CenTraVac UC800, Symbio 800 CenTraVac, BAS-PTS029 - Air-cooled scroll chiller controller
Trane Symbio 800 CGAM
Trane CGAM air-cooled scroll chillers with Symbio 800 controls.
Also known as: CGAM, CGAM air-cooled chiller, Symbio 800 CGAM, BAS-PTS019 - Air-cooled scroll chiller controller
Trane Symbio 800 CGAM (CH530)
Trane CGAM air-cooled scroll chillers whose Symbio 800 points list Trane tags '(CH530)'.
Also known as: CGAM, CGAM CH530, CH530 CGAM, Symbio 800 CGAM, BAS-PTS027 - Water-cooled centrifugal chiller controller
Trane Symbio 800 HDWA (UC800)
Trane HDWA water-cooled chillers whose Symbio 800 points list Trane tags '(UC800)'.
Also known as: HDWA, Agility HDWA, HDWA UC800, Symbio 800 HDWA, BAS-PTS028 - Split system controller
Trane Symbio 800 IntelliCore Split System (RAUK)
Trane IntelliCore split systems (RAUK) controlled by a Symbio 800.
Also known as: IntelliCore, RAUK, IntelliCore split system, Symbio 800, BAS-PTS036 - Rooftop unit / air handler controller
Trane Symbio 800 IntelliPak
Trane IntelliPak large packaged rooftop units running the Symbio 800 controller.
Also known as: Symbio 800, IntelliPak rooftop, IntelliPak with Symbio 800, BAS-PTS003 - Air-cooled screw chiller controller
Trane Symbio 800 RTAC
Trane RTAC air-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: RTAC, Series R RTAC, RTAC air-cooled chiller, BAS-PTS023 - Air-cooled screw chiller controller
Trane Symbio 800 RTAC (CH530)
Trane RTAC air-cooled helical-rotary chillers covered by Trane's 'RTAC (CH530)' Symbio 800 points list.
Also known as: RTAC, Series R RTAC, RTAC CH530, CH530, BAS-PTS031 - Air-cooled screw chiller controller
Trane Symbio 800 RTAC (UC800)
Trane RTAC air-cooled helical-rotary chillers covered by Trane's 'RTAC (UC800)' Symbio 800 points list.
Also known as: RTAC, Series R RTAC, RTAC UC800, UC800, BAS-PTS032 - Water-cooled screw chiller controller
Trane Symbio 800 RTHD (CH530)
Trane RTHD water-cooled helical-rotary chillers covered by Trane's 'RTHD (CH530)' Symbio 800 points list.
Also known as: RTHD, Series R RTHD, RTHD CH530, CH530, BAS-PTS033 - Water-cooled screw chiller controller
Trane Symbio 800 RTHD (UC800)
Trane RTHD water-cooled helical-rotary chillers covered by Trane's 'RTHD (UC800)' Symbio 800 points list.
Also known as: RTHD, Series R RTHD, RTHD UC800, UC800, BAS-PTS034 - Water-cooled screw chiller controller
Trane Symbio 800 RTWD (CH530)
Trane RTWD water-cooled helical-rotary chillers covered by Trane's 'RTWD (CH530)' Symbio 800 points list.
Also known as: RTWD, Series R RTWD, RTWD CH530, CH530, BAS-PTS035 - Water-cooled screw chiller controller
Trane Symbio 800 Series R RTHD
Trane Series R model RTHD water-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: RTHD, Series R RTHD, RTHD water-cooled chiller, Symbio 800 RTHD, BAS-PTS015 - Water-cooled screw chiller controller
Trane Symbio 800 Series R RTWD
Trane Series R model RTWD water-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: RTWD, Series R RTWD, Series R water-cooled chiller, BAS-PTS017 - Air-cooled screw chiller controller
Trane Symbio 800 Sintesis RTAF
Trane Sintesis model RTAF air-cooled helical-rotary chillers with Symbio 800 controls.
Also known as: Sintesis RTAF, RTAF, Sintesis air-cooled chiller, Symbio 800 Sintesis, BAS-PTS013 - Dedicated outdoor air unit (DOAS) controller
Trane Tracer UC600 Packaged Outdoor Air Unit
Trane packaged outdoor air units controlled by a Tracer UC600 running the packaged outdoor air unit program.
Also known as: Tracer UC600, UC600 DOAS, Packaged Outdoor Air Unit, BAS-SVP18 - Heat pump / fan coil controller (zone sensor interaction subset)
Trane UC400-B / Symbio 500 (FC, BC, UV, staged WSHP) - touch-screen zone sensor points
Factory-programmed Trane fan coils, blower coils, unit ventilators and staged water-source heat pumps on Tracer UC400-B or Symbio 400-B/500, used with the touch-screen programmable zone sensor.
Also known as: UC400-B, Symbio 500, Symbio 400-B, X13790993001, SEN02587, X13790992001, BAS-SVP080A - Heat pump / fan coil controller (zone sensor interaction subset)
Trane UC400-B / Symbio 500 VS-WSHP - touch-screen zone sensor points
Factory-programmed Trane variable-speed water-source heat pumps on Tracer UC400-B or Symbio 400-B/500, used with the touch-screen programmable zone sensor.
Also known as: UC400-B VS-WSHP, Symbio 500 VS-WSHP, variable speed WSHP, X13790993001, SEN02587, BAS-SVP080A
Source: Integration Guide - Symbio 400-B/500 Programmable Controller for Fan Coil, Blower Coil and Unit Ventilator · BAS-SVP060A-EN · rev. October 2022. Object names, instances and units are reproduced as published; descriptions are our own.