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Centrifugal chiller controller · BACnet points list

Trane Symbio 800 CenTraVac Simplex (UC800) BACnet points list

Updated 28 October 2026

Short answer

This Symbio 800 list for simplex CenTraVac chillers has about 530 BACnet objects with low instance numbers: AI 1-339, status BI 1-24 and diagnostic BI 501-949. AIs cover water temperatures, refrigerant and oil, purge, starter, drive (AFD), bearing and motor data. The BAS writes chilled and hot water setpoints, current limit, base loading, circuit lockouts, mode and auto/stop.

This page lists 526 BACnet objects for the Trane Symbio 800 CenTraVac Simplex (UC800) — 10 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 800 CenTraVac Simplex (UC800)
Equipment
Centrifugal chiller controller
Equipment type
Chillers
BACnet objects
526 (10 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Not stated
Also known as
CenTraVac, CTV, CTV-Simplex, CenTraVac UC800, Symbio 800 CenTraVac, BAS-PTS029
Source document
Symbio 800 Integration Points List BACnet - CTV-Simplex (UC800) · BAS-PTS029A-EN · rev. 12/6/2024
Download CSV 526 rows Download EDE B.I.G.-EU JSON Manufacturer PDF ↗ Download Easy BACnet Mobile App Google Play

BMS integration notes: Trane Symbio 800 CenTraVac Simplex (UC800)

Integration in brief

Put the chiller on the network (BACnet MS/TP or IP), then write the auto/stop command, chilled water setpoint, current limit and mode. Read back running state, leaving water temperature and capacity. Check the local-setpoint flag to confirm the BAS setpoints are actually in use. Most remaining objects are read-only status and per-alarm diagnostic flags.

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 1BAS Chiller Auto Stop CommandBMS auto/stop command (1 = Stop, 2 = Auto)Write
MV 2BAS Chiller Mode CommandCool/heat/ice/free-cooling mode commandWrite
AV 1BAS Chilled Water SetpointChilled water setpoint from the BMSWrite
AV 2BAS Current Limit SetpointCurrent limit from the BMS, % RLAWrite
BI 1Chiller RunningChiller on/off statusRead
BI 12Local Setpoint ControlShows if local setpoints override BAS setpointsRead
AI 8Evap Leaving Water TempLeaving chilled water temperatureRead
AI 5Calculated Chiller CapacityCalculated cooling capacityRead
BI 10Alarm PresentAny active alarm on the chillerRead

Enable & remote start

MV 1 BAS Chiller Auto Stop Command (1 = Stop, 2 = Auto; relinquish default Auto) is the BMS auto/stop; with it at Auto the chiller runs when its own run conditions are met. MI 10 External Auto Stop reports the hardwired external auto/stop input, and BI 11 Chiller In Auto shows whether the chiller is enabled to run. The documents don't say how the two combine or how to hand setpoint control to the BAS; BI 12 Local Setpoint Control shows when the chiller is using local setpoints instead of BAS setpoints, and MI 4 Active Chilled Water Setpoint Source shows Front Panel, External, Ice Machine or BAS.

Network setup

Watch out for

Trane Symbio 800 CenTraVac Simplex (UC800) 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.

526 of 526 shown
Type
Access
Show
Trane Symbio 800 CenTraVac Simplex (UC800) BACnet Points List
DescriptionStates
AI1Unit Average Line CurrentRead
AI2Active Current Limit SetpointRead
AI3Active Base Loading SetptRead
AI4Unit Power ConsumptionRead
AImin5Calculated Chiller CapacityRead
AI7Active Cool/Heat Setpoint TemperatureRead
AImin8Evap Leaving Water TempRead
AI9Evap Entering Water TempRead
AI10Cond Entering Water TempRead
AI11Cond Leaving Water TempRead
AI12Approx Evap Water FlowRead
AI13Evap Differential Wtr PressRead
AI14Approx Cond Water FlowRead
AI15Cond Differential Wtr PressRead
AI16Second Condenser Entering Water TemperatureRead
AI17Second Condenser Leaving Water TemperatureRead
AI18AFD Last Diagnostic Code Ckt1Read
AI19Front Panel Chilled Water SetptRead
AI20Front Panel Current Limit SetpointRead
AI21Front Panel Hot Water SetptRead
AI22Front Panel Base Loading SetptRead
AI23Ext Chilled Wtr SetptRead
AI24Ext Current Limit SetptRead
AI25External Base Loading SetpointRead
AI26Refrigerant MonitorRead
AI27Evaporator Refrigerant Pressure Ckt1Read
AI28Condenser Refrigerant Pressure Ckt1Read
AI30Oil Tank Pressure Ckt1Read
AI31Oil Pump Discharge Pressure Ckt1Read
AI32Oil Differential Pressure Ckt1Read
AI33Oil Tank Temperature Ckt1Read
AI34Evaporator Saturated Rfgt Temp Ckt1Read
AI35Condenser Saturated Rfgt Temp Ckt1Read
AI36Compressor Rfgt Discharge Temp Ckt1Read
AI37IGV1 Percent Open Ckt1Read
AI38IGV2 Percent Open Ckt2Read
AI39Purge Carbon Tank Temp Ckt1Read
AI40Purge Liquid Temperature Ckt1Read
AI41Purge Rfgt Compressor Suction Temp Ckt1Read
AI42Time Until Next Purge Run Ckt1Read
AI43Pumpout Chiller On-7 Days Ckt1Read
AI44Pumpout Chiller Off-7 Days Ckt1Read
AI45Daily Pumpout-24 Hours Ckt1Read
AI46Pumpout-Life Ckt1Read
AI47Refrigerant-Life Ckt1Read
AI48Compressor Starts Ckt1Read
AI49Compressor Running Time Ckt1Read
AI50Starter Voltage Phase AB Ckt1Read
AI51Starter Voltage Phase BC ckt1Read
AI52Starter Voltage Phase CA Ckt1Read
AI53Starter Average Phase Voltage Ckt1Read
AI54Starter Current L1 Ckt1Read
AI55Starter Current L2 Ckt1Read
AI56Starter Current L3 Ckt1Read
AI57Average Line Current Ckt1Read
AI58Starter Current L1 % RLA Ckt1Read
AI59Starter Current L1 % RLA Ckt1Read
AI60Starter Current L1 % RLA Ckt1Read
AI61Average Line Current % RLA Ckt1Read
AI62Starter Power Consumption Ckt1Read
AI63Starter Load Power Factor Ckt1Read
AI64Inboard Bearing Temperature Ckt1Read
AI65Outboard Bearing Temperature Ckt1Read
AI66Motor Winding Temperature 1 Ckt1Read
AI67Motor Winding Temperature 2 Ckt1Read
AI68Motor Winding Temperature 3 Ckt1Read
AI69Frequency Ckt1Read
AI70AFD Transistor Temperature Ckt1Read
AI71Evaporator Refrigerant Pressure Ckt2Read
AI72Condenser Refrigerant Pressure Ckt2Read
AI74Oil Tank Pressure Ckt2Read
AI75Oil Pump Discharge Pressure Ckt2Read
AI76Oil Differential Pressure Ckt2Read
AI77Oil Tank Temperature Ckt2Read
AI78Evaporator Saturated Rfgt Temp Ckt2Read
AI79Condenser Saturated Rfgt Temp Ckt2Read
AI80Compressor Rfgt Discharge Temp Ckt2Read
AI81IGV 1 Percent Open Ckt2Read
AI82IGV 2 Percent Open Ckt2Read
AI83Purge Carbon Tank Temp Ckt2Read
AI84Purge Liquid Tank Temp Ckt2Read
AI85Purge Rfgt Compressor Suction Temp Ckt2Read
AI86Time Until Next Purge Run Ckt2Read
AI87Pumpout Chiller On 7 Days Ckt2Read
AI88Pumpout Chiller Off 7 Days Ckt2Read
AI89Daily Pumpout-24 Hours Ckt2Read
AI90Pumpout-Life Ckt2Read
AI91Refrigeration-Line Ckt2Read
AI92Compressor Starts Ckt2Read
AI93Compressor Running Time Ckt2Read
AI94Starter Voltage Phase AB Ckt2Read
AI95Starter Voltage Phase BC Ckt2Read
AI96Starter Voltage Phase CA Ckt2Read
AI97Starter Average Phase Voltage Ckt2Read
AI98Starter Current L1 Ckt2Read
AI99Starter Current L2 Ckt2Read
AI100Starter Current L3 Ckt2Read
AI101Average Line Current Ckt2Read
AI102Starter Current L1 % RLA Ckt2Read
AI103Starter Current L2 % RLA Ckt2Read
AI104Starter Current L3 % RLA Ckt2Read
AI105Average Line Current % RLA Ckt2Read
AI106Starter Power Consumption Ckt2Read
AI107Starter Load Power Factor Ckt2Read
AI108Inboard Bearing Temperature Ckt2Read
AI109Outboard Bearing Temperature Ckt2Read
AI110Motor Winding Temperature 1 Ckt2Read
AI111Motor Winding Temperature 2 Ckt2Read
AI112Motor Winding Temperature 3 Ckt2Read
AI113Frequency Ckt2Read
AI114AFD Transistor Temperature Ckt2Read
AI115AFD Last Diagnostic Code Ckt2Read
AI116Differential Refrigerant Pressure Ckt1Read
AI117Differential Refrigerant Pressure Ckt2Read
AI118AFD Average Input Current Ckt1Read
AI119AFD Input Current L1 Ckt1Read
AI120AFD Input Current L2 Ckt1Read
AI121AFD Input Current L3 Ckt1Read
AI122AFD Input Frequency Ckt1Read
AI123AFD Output Voltage Ckt1Read
AI124AFD Input Power Factor Ckt1Read
AI125AFD Inverter Base Temperature Ckt1Read
AI126AFD Rectifier Base Temperature Ckt1Read
AI127AFD Output Power Ckt1Read
AI128AFD Average Input Current Ckt2Read
AI129AFD Input Current L1 Ckt2Read
AI130AFD Input Current L2 Ckt2Read
AI131AFD Input Current L3 Ckt2Read
AI132AFD Input Frequency Ckt2Read
AI133AFD Output Voltage Ckt2Read
AI134AFD Input Power Factor Ckt2Read
AI135AFD Inverter Base Temperature Ckt2Read
AI136AFD Rectifier Base Temperature Ckt2Read
AI137AFD Output Power Ckt2Read
AI138Frequency Command Ckt1Read
AI139Frequency Command Ckt2Read
AI140AFD DC Bus voltage Ckt1Read
AI141AFD DC Bus voltage Ckt2Read
AI142Condenser Entering Water PressureRead
AI143Condenser Leaving Water PressureRead
AI144Evaporator Entering Water PressureRead
AI145Evaporator Entering Water PressureRead
AI334Outboard Bearing Pad Temperature #1 Ckt1Read
AI335Outboard Bearing Pad Temperature #2 Ckt1Read
AI336Outboard Bearing Pad Temperature #3 Ckt1Read
AI337Outboard Bearing Pad Temperature #1 Ckt2Read
AI338Outboard Bearing Pad Temperature #2 Ckt2Read
AI339Outboard Bearing Pad Temperature #3 Ckt2Read
AVmin1BAS Chilled Water SetpointRange 0°F to 75°F (depending on installed options) (-17.78° to 23.9° C); default 44°F (6.7° C)Write
AVmin2BAS Current Limit SetpointRange 0-100%; default 100% RLAWrite
AV3BAS Hot Water SetpointRange 80°F to 140°F (26.7°C to 60°C); default 120°F (48.9°C)Write
AV4BAS Base Loading SetpointRange 0-100%; default 50%Write
BImin1Chiller RunningRead0 = No (Not Running), 1 = Yes (Running)
BI2Evaporator Pump ControlRead0 = Off (Pump Off), 1 = On (Pump On)
BI3Evaporator Water FlowRead0 = No Flow, 1 = Flow
BI4Condenser Pump ControlRead0 = Off (Pump Off), 1 = On (Pump On)
BI5Condenser Water FlowRead0 = No Flow, 1 = Flow
BI6Front Panel Base Loading CommandRead0 = Auto, 1 = On
BI7Emergency StopRead0 = Off, 1 = On
BI8Manual Override ExistsRead0 = False, 1 = True
BI9Base LoadingRead0 = Inactive, 1 = Active
BImin10Alarm PresentRead0 = No, 1 = Yes
BI11Chiller In AutoRead0 = No, 1 = Yes
BImin12Local Setpoint ControlRead0 = No, 1 = Yes
BI13Maximum Capacity RelayRead0 = Off, 1 = On
BI14Limit Mode Relay StatusRead0 = Inactive, 1 = Active
BI15Head Relief Request RelayRead0 = Off, 1 = On
BI17Purge Compressor Relay Ckt1Read0 = Off, 1 = On
BI18Pumpout Relay Ckt1Read0 = Off, 1 = On
BI19Purge Regen Valve Solenoid Ckt1Read0 = Off, 1 = On
BI20Purge Compressor Relay Ckt2Read0 = Off, 1 = On
BI21Pumpout Relay Ckt2Read0 = Off, 1 = On
BI22Purge Regen Valve Solenoid Ckt2Read0 = Off, 1 = On
BI23Circuit Available Ckt1Read0 = No, 1 = Yes
BI24Circuit Available Ckt2Read0 = No, 1 = Yes
BI501Started Did Not TransitionRead0 = Off, 1 = On
BI502Starter Did Not Fully AccelerateRead0 = Off, 1 = On
BI503Phase ReversalRead0 = Off, 1 = On
BI504Start Dry Run TestRead0 = Off, 1 = On
BI505Phase LossRead0 = Off, 1 = On
BI506Power LossRead0 = Off, 1 = On
BI507Momentary Power LossRead0 = Off, 1 = On
BI508Severe Current UnbalanceRead0 = Off, 1 = On
BI509Starter Fault Type 1Read0 = Off, 1 = On
BI510Starter Fault Type 2Read0 = Off, 1 = On
BI511Starter Fault Type 3Read0 = Off, 1 = On
BI512Transition Complete Input ShortedRead0 = Off, 1 = On
BI513At Speed Input ShortedRead0 = Off, 1 = On
BI514Transition Complete Input OpenedRead0 = Off, 1 = On
BI515At Speed Input OpenedRead0 = Off, 1 = On
BI516Motor Current OverloadRead0 = Off, 1 = On
BI517Compressor Did Not Accelerate: ShutdownRead0 = Off, 1 = On
BI518Cprsr Did Not Accelerate: TransitionRead0 = Off, 1 = On
BI519Starter Contactor Interrupt FailureRead0 = Off, 1 = On
BI520Starter Module Memory Error Type 1Read0 = Off, 1 = On
BI521Starter Module Memory Error Type 2Read0 = Off, 1 = On
BI522Starter Comm Loss: Main ProcessorRead0 = Off, 1 = On
BI536AFD Power LossRead0 = Off, 1 = On
BI537AFD Start InhibitedRead0 = Off, 1 = On
BI538AFD Motor Current OverloadRead0 = Off, 1 = On
BI539AFD Motor ShortRead0 = Off, 1 = On
BI540AFD Instantaneous Current OverloadRead0 = Off, 1 = On
BI541AFD High TemperatureRead0 = Off, 1 = On
BI542AFD Output Phase LossRead0 = Off, 1 = On
BI543AFD Ground FaultRead0 = Off, 1 = On
BI544HPC/High AFD Heat Sink Water PressureRead0 = Off, 1 = On
BI545AFD Communication Loss: Main ProcessorRead0 = Off, 1 = On
BI546AFD High Bus VoltageRead0 = Off, 1 = On
BI547AFD Control Board Memory Error Type 2Read0 = Off, 1 = On
BI548AFD General FailureRead0 = Off, 1 = On
BI549AFD Fatal Software ErrorRead0 = Off, 1 = On
BI550AFD I/O Board FailureRead0 = Off, 1 = On
BI551AFD Power Intfc Controller Board FailureRead0 = Off, 1 = On
BI552AFD Power Structure Board FailureRead0 = Off, 1 = On
BI553AFD DPI Communication FailureRead0 = Off, 1 = On
BI554AFD RS485 Board Memory Error Type 2Read0 = Off, 1 = On
BI555External Chilled/Hot Water SetpointRead0 = Off, 1 = On
BI556External Current Limit SetpointRead0 = Off, 1 = On
BI557Evaporator Entering Water Temp SensorRead0 = Off, 1 = On
BI558Evaporator Leaving Water Temp SensorRead0 = Off, 1 = On
BI559Condenser Entering Water Temp SensorRead0 = Off, 1 = On
BI560Condenser Leaving Water Temp SensorRead0 = Off, 1 = On
BI561Evaporator Diff Water Pressure XdcrRead0 = Off, 1 = On
BI562Condenser Diff Water Pressure Xdcr(b)Read0 = Off, 1 = On
BI565Evap Saturated Refrigerant Temp SensorRead0 = Off, 1 = On
BI566Cond Saturated Refrigerant Temp SensorRead0 = Off, 1 = On
BI568Condenser Refrigerant Pressure Xdcr(b)Read0 = Off, 1 = On
BI569Oil Tank Temperature SensorRead0 = Off, 1 = On
BI570Oil Pump Discharge Pressure TransducerRead0 = Off, 1 = On
BI571Oil Tank Pressure TransducerRead0 = Off, 1 = On
BI572Motor Winding Temperature 1 SensorRead0 = Off, 1 = On
BI573Motor Winding Temperature 2 SensorRead0 = Off, 1 = On
BI574Motor Winding Temperature 3 SensorRead0 = Off, 1 = On
BI575Inboard Bearing Temp SensorRead0 = Off, 1 = On
BI576Outboard Bearing Temp SensorRead0 = Off, 1 = On
BI577Cprsr Discharge Refrigerant Temp SensorRead0 = Off, 1 = On
BI578Outdoor Air Temp SensorRead0 = Off, 1 = On
BI579Purge Cprsr Suction Rfgt Temp SensorRead0 = Off, 1 = On
BI580Purge Carbon Tank Temperature SensorRead0 = Off, 1 = On
BI581External Base Loading SetpointRead0 = Off, 1 = On
BI583Purge Liquid Level Too High WarningRead0 = Off, 1 = On
BI584Purge Liquid Level Too High ContinuouslyRead0 = Off, 1 = On
BI585Purge Carbon Regen Temp Not SatisfiedRead0 = Off, 1 = On
BI586Purge Carbon Regen Temp Limit ExceededRead0 = Off, 1 = On
BI587Purge Daily Pumpout Limit ExceededRead0 = Off, 1 = On
BI588Purge Carbon Regen Temperature Too LowRead0 = Off, 1 = On
BI589Low Evaporator Refrigerant TemperatureRead0 = Off, 1 = On
BI590High Oil TemperatureRead0 = Off, 1 = On
BI591Low Evap Leaving Water Temp: Unit OffRead0 = Off, 1 = On
BI592Low Evap Leaving Water Temp: Unit OnRead0 = Off, 1 = On
BI593Evaporator Water Flow OverdueRead0 = Off, 1 = On
BI594Evaporator Water Flow LostRead0 = Off, 1 = On
BI595High Evaporator Water TemperatureRead0 = Off, 1 = On
BI596Condenser High Pressure CutoutRead0 = Off, 1 = On
BI597Emergency StopRead0 = Off, 1 = On
BI598MP: Invalid ConfigurationRead0 = Off, 1 = On
BI603MP: Reset Has OccurredRead0 = Off, 1 = On
BI604Extended Compressor SurgeRead0 = Off, 1 = On
BI605Over VoltageRead0 = Off, 1 = On
BI606Under VoltageRead0 = Off, 1 = On
BI607Low Evaporator Water FlowRead0 = Off, 1 = On
BI608Condenser Water Flow OverdueRead0 = Off, 1 = On
BI609Condenser Water Flow LostRead0 = Off, 1 = On
BI614Unexpected Starter ShutdownRead0 = Off, 1 = On
BI615Starter Failed to Alrm/StartRead0 = Off, 1 = On
BI617Low Differential Oil PressureRead0 = Off, 1 = On
BI618Check Oil FilterRead0 = Off, 1 = On
BI619Oil Pressure Sensor CalibrationRead0 = Off, 1 = On
BI620High Vacuum LockoutRead0 = Off, 1 = On
BI621Low Oil TemperatureRead0 = Off, 1 = On
BI622High Inboard Bearing TemperatureRead0 = Off, 1 = On
BI623High Outboard Bearing TemperatureRead0 = Off, 1 = On
BI624High Cprsr Rfgt Discharge TemperatureRead0 = Off, 1 = On
BI625High Motor Winding Temperature 1Read0 = Off, 1 = On
BI626High Motor Winding Temperature 2Read0 = Off, 1 = On
BI627High Motor Winding Temperature 3Read0 = Off, 1 = On
BI628Refrigerant Monitor InputRead0 = Off, 1 = On
BI629Unexpected Differential oil PressureRead0 = Off, 1 = On
BI630Differential Oil Pressure OverdueRead0 = Off, 1 = On
BI636Generator Fault Relay OpenRead0 = Off, 1 = On
BI637Generator Ready OverdueRead0 = Off, 1 = On
BI646Excessive Loss of CommunicationRead0 = Off, 1 = On
BI647Comm Loss: External Auto/StopRead0 = Off, 1 = On
BI648Comm Loss: Emergency StopRead0 = Off, 1 = On
BI649Comm Loss: External Ice Building CommandRead0 = Off, 1 = On
BI650Comm Loss: Outdoor Air TemperatureRead0 = Off, 1 = On
BI651Comm Loss: Evap Leaving Water TempRead0 = Off, 1 = On
BI652Comm Loss: Evap Entering Water TempRead0 = Off, 1 = On
BI653Comm Loss: Condenser Leaving Water TempRead0 = Off, 1 = On
BI654Comm Loss: Condenser Entering Water TempRead0 = Off, 1 = On
BI655Comm Loss: Sec Cond Leaving Water TempRead0 = Off, 1 = On
BI656Comm Loss: Sec Cond Entering Water TempRead0 = Off, 1 = On
BI657Comm Loss: Oil Tank TemperatureRead0 = Off, 1 = On
BI658Comm Loss: Ext Chilled/Hot Wtr SetpointRead0 = Off, 1 = On
BI659Comm Loss: Ext Current Limit SetpointRead0 = Off, 1 = On
BI660Comm Loss: Cond High Pressure CutoutRead0 = Off, 1 = On
BI661Comm Loss: Evaporator Water Flow SwitchRead0 = Off, 1 = On
BI662Comm Loss: Condenser Water Flow SwitchRead0 = Off, 1 = On
BI663Comm Loss: Evap Saturated Rfgt TempRead0 = Off, 1 = On
BI664Comm Loss: Cond Saturated Rfgt TempRead0 = Off, 1 = On
BI666Comm Loss: Cond Refrigerant PressureRead0 = Off, 1 = On
BI667Comm Loss: Oil Tank PressureRead0 = Off, 1 = On
BI668Comm Loss: Oil Pump Discharge PressureRead0 = Off, 1 = On
BI669Comm Loss: Evaporator Water Pump RelayRead0 = Off, 1 = On
BI670Comm Loss: Condenser Water Pump RelayRead0 = Off, 1 = On
BI671Comm Loss: Ice Building RelayRead0 = Off, 1 = On
BI672Comm Loss: StarterRead0 = Off, 1 = On
BI673Comm Loss: Adaptive Frequency DriveRead0 = Off, 1 = On
BI682Comm Loss: Evap Diff Water PressureRead0 = Off, 1 = On
BI683Comm Loss: Cond Diff Water PressureRead0 = Off, 1 = On
BI684Comm Loss: Cond Rfgt Pressure OutputRead0 = Off, 1 = On
BI685Comm Loss: Compressor Motor % RLA OutputRead0 = Off, 1 = On
BI686Comm Loss: Refrigerant Monitor InputRead0 = Off, 1 = On
BI692Comm Loss: Purge Cprsr Suction Rfgt TempRead0 = Off, 1 = On
BI693Comm Loss: Purge Carbon Tank TemperatureRead0 = Off, 1 = On
BI694Comm Loss: Purge Liquid Level SwitchRead0 = Off, 1 = On
BI696Comm Loss: Purge Pumpout RelayRead0 = Off, 1 = On
BI697Comm Loss: Purge Carbon Tank Heater RlyRead0 = Off, 1 = On
BI698Comm Loss: Purge Regen Solenoid RelayRead0 = Off, 1 = On
BI699Comm Loss: Purge Alarm RelayRead0 = Off, 1 = On
BI700Comm Loss: Purge Pumpout Solenoid OutputRead0 = Off, 1 = On
BI701Comm Loss: Purge Exhaust Solenoid OutputRead0 = Off, 1 = On
BI702Comm Loss: Purge Condensing Unit RelayRead0 = Off, 1 = On
BI705Comm Loss: Oil/Refrigerant Pump RelayRead0 = Off, 1 = On
BI706Comm Loss: Oil Tank Heater RelayRead0 = Off, 1 = On
BI709Comm Loss: Motor Winding Temperature 1Read0 = Off, 1 = On
BI710Comm Loss: Motor Winding Temperature 2Read0 = Off, 1 = On
BI711Comm Loss: Motor Winding Temperature 3Read0 = Off, 1 = On
BI712Comm Loss: Inboard Bearing TemperatureRead0 = Off, 1 = On
BI713Comm Loss: Outboard Bearing TemperatureRead0 = Off, 1 = On
BI714Comm Loss: Cprsr Discharge Rfgt TempRead0 = Off, 1 = On
BI715Comm Loss: IGV First Stage ActuatorRead0 = Off, 1 = On
BI716Comm Loss: IGV Second Stage ActuatorRead0 = Off, 1 = On
BI717Comm Loss: Ext Base Loading SetpointRead0 = Off, 1 = On
BI718Comm Loss: Ext Base Loading CommandRead0 = Off, 1 = On
BI719Comm Loss: External Hot Water CommandRead0 = Off, 1 = On
BI723Comm Loss: Generator Start/Stop RelayRead0 = Off, 1 = On
BI724Comm Loss: Generator Speed Signal OutputRead0 = Off, 1 = On
BI725Comm Loss: Generator Up To Speed InputRead0 = Off, 1 = On
BI726Comm Loss: Generator Fault InputRead0 = Off, 1 = On
BI727Comm Loss: Generator Fault LockoutRead0 = Off, 1 = On
BI739Comm Loss: AFD Speed Signal VDC OutputRead0 = Off, 1 = On
BI744Comm Loss: Programmable Relay Board 1Read0 = Off, 1 = On
BI745Comm Loss: Programmable Relay Board 2Read0 = Off, 1 = On
BI755Starter Did Not TransitionRead0 = Off, 1 = On
BI756Starter Did Not Fully AccelerateRead0 = Off, 1 = On
BI757Phase ReversalRead0 = Off, 1 = On
BI759Starter Dry Run TestRead0 = Off, 1 = On
BI761Phase LossRead0 = Off, 1 = On
BI763Power LossRead0 = Off, 1 = On
BI765Momentary Power LossRead0 = Off, 1 = On
BI767Severe Current UnbalanceRead0 = Off, 1 = On
BI769Starter Fault Type 1Read0 = Off, 1 = On
BI770Starter Fault Type 2Read0 = Off, 1 = On
BI771Starter Fault Type 3Read0 = Off, 1 = On
BI772Transition Complete Input ShortedRead0 = Off, 1 = On
BI773At Speed Input ShortedRead0 = Off, 1 = On
BI774Transition Complete Input OpenedRead0 = Off, 1 = On
BI775At Speed Input OpenedRead0 = Off, 1 = On
BI776Motor Current OverloadRead0 = Off, 1 = On
BI778Compressor Did Not Accelerate: ShutdownRead0 = Off, 1 = On
BI779Cprsr Did Not Accelerate: TransitionRead0 = Off, 1 = On
BI780Starter Contactor Interrupt FailureRead0 = Off, 1 = On
BI782Starter Module Memory Error Type 1Read0 = Off, 1 = On
BI783Starter Module Memory Error Type 2Read0 = Off, 1 = On
BI784Starter Comm Loss: Main ProcessorRead0 = Off, 1 = On
BI795AFD Power LossRead0 = Off, 1 = On
BI796AFD Start InhibitedRead0 = Off, 1 = On
BI797AFD Motor Current OverloadRead0 = Off, 1 = On
BI798AFD Motor ShortRead0 = Off, 1 = On
BI799AFD Instantaneous Current OverloadRead0 = Off, 1 = On
BI800AFD High TemperatureRead0 = Off, 1 = On
BI801AFD Output Phase LossRead0 = Off, 1 = On
BI802AFD Ground FaultRead0 = Off, 1 = On
BI803HPC/High AFD Heat Sink Water PressureRead0 = Off, 1 = On
BI804AFD Comm Loss: Main ProcessorRead0 = Off, 1 = On
BI805AFD High Bus VoltageRead0 = Off, 1 = On
BI806AFD Control Board Memory Error Type 2Read0 = Off, 1 = On
BI807AFD General FailureRead0 = Off, 1 = On
BI808AFD Fatal Software ErrorRead0 = Off, 1 = On
BI809AFD I/O Board FailureRead0 = Off, 1 = On
BI810AFD Power Intfc Controller Board FailureRead0 = Off, 1 = On
BI811AFD Power Structure Board FailureRead0 = Off, 1 = On
BI812AFD DPI Communication FailureRead0 = Off, 1 = On
BI813AFD RS485 Board Memory Error Type 2Read0 = Off, 1 = On
BI814Evap Saturated Refrigerant Temp SensorRead0 = Off, 1 = On
BI815Cond Saturated Refrigerant Temp SensorRead0 = Off, 1 = On
BI816Condenser Refrigerant Pressure Xdcr(b)Read0 = Off, 1 = On
BI817Oil Tank Temperature SensorRead0 = Off, 1 = On
BI818Oil Pump Discharge Pressure TransducerRead0 = Off, 1 = On
BI819Oil Tank Pressure TransducerRead0 = Off, 1 = On
BI820Motor Winding Temperature 1 SensorRead0 = Off, 1 = On
BI821Motor Winding Temperature 2 SensorRead0 = Off, 1 = On
BI822Motor Winding Temperature 3 SensorRead0 = Off, 1 = On
BI823Inboard Bearing Temp SensorRead0 = Off, 1 = On
BI824Outboard Bearing Temp SensorRead0 = Off, 1 = On
BI825Cprsr Discharge Refrigerant Temp SensorRead0 = Off, 1 = On
BI826Purge Cprsr Suction Rfgt Temp SensorRead0 = Off, 1 = On
BI827Purge Carbon Tank Temperature SensorRead0 = Off, 1 = On
BI828Purge Liquid Level Too High WarningRead0 = Off, 1 = On
BI829Purge Liquid Level Too High ContinuouslyRead0 = Off, 1 = On
BI830Purge Carbon Regen Temp Not SatisfiedRead0 = Off, 1 = On
BI831Purge Carbon Regen Temp Limit ExceededRead0 = Off, 1 = On
BI832Purge Daily Pumpout Limit ExceededRead0 = Off, 1 = On
BI833Purge Carbon Regen Temperature Too LowRead0 = Off, 1 = On
BI834Low Evaporator Refrigerant TemperatureRead0 = Off, 1 = On
BI835High Oil TemperatureRead0 = Off, 1 = On
BI836Condenser High Pressure CutoutRead0 = Off, 1 = On
BI837Extended Compressor SurgeRead0 = Off, 1 = On
BI838Over VoltageRead0 = Off, 1 = On
BI839Under VoltageRead0 = Off, 1 = On
BI840Unexpected Starter ShutdownRead0 = Off, 1 = On
BI841Starter Failed to Arm/StartRead0 = Off, 1 = On
BI843Low Differential Oil PressureRead0 = Off, 1 = On
BI844Check Oil FilterRead0 = Off, 1 = On
BI845Oil Pressure Sensor CalibrationRead0 = Off, 1 = On
BI846High Vacuum LockoutRead0 = Off, 1 = On
BI847Low Oil TemperatureRead0 = Off, 1 = On
BI848High Inboard Bearing TemperatureRead0 = Off, 1 = On
BI849High Outboard Bearing TempRead0 = Off, 1 = On
BI850High Cprsr Rfgt Discharge TemperatureRead0 = Off, 1 = On
BI851High Motor Winding Temperature 1Read0 = Off, 1 = On
BI852High Motor Winding Temperature 2Read0 = Off, 1 = On
BI853High Motor Winding Temperature 3Read0 = Off, 1 = On
BI854Unexpected Differential Oil PressureRead0 = Off, 1 = On
BI855Differential Oil Pressure OverdueRead0 = Off, 1 = On
BI858Generator Fault Relay OpenRead0 = Off, 1 = On
BI859Generator Ready Signal OverdueRead0 = Off, 1 = On
BI860Comm Loss: Oil Tank TemperatureRead0 = Off, 1 = On
BI861Comm Loss: Cond High Pressure CutoutRead0 = Off, 1 = On
BI862Comm Loss: Evap Sat Refrig TempRead0 = Off, 1 = On
BI863Comm Loss: Cond Saturated Rfgt TempRead0 = Off, 1 = On
BI864Comm Loss: Cond Refrigerant PressureRead0 = Off, 1 = On
BI865Comm Loss: Oil Tank PressureRead0 = Off, 1 = On
BI866Comm Loss: Oil Pump Discharge PressureRead0 = Off, 1 = On
BI867Comm Loss: StarterRead0 = Off, 1 = On
BI869Comm Loss: Adaptive Frequency DriveRead0 = Off, 1 = On
BI872Comm Loss: Cond Rfgt Pressure OutputRead0 = Off, 1 = On
BI873Comm Loss: Compressor Motor % RLA OutputRead0 = Off, 1 = On
BI874Comm Loss: Purge Cprsr Suction Rfgt TempRead0 = Off, 1 = On
BI875Comm Loss: Purge Carbon Tank TemperatureRead0 = Off, 1 = On
BI876Comm Loss: Purge Liquid Level SwitchRead0 = Off, 1 = On
BI878Comm Loss: Purge Pumpout RelayRead0 = Off, 1 = On
BI879Comm Loss: Purge Carbon Tank Heater RlyRead0 = Off, 1 = On
BI880Comm Loss: Purge Regen Solenoid RelayRead0 = Off, 1 = On
BI881Comm Loss: Purge Alarm RelayRead0 = Off, 1 = On
BI882Comm Loss: Purge Pumpout Solenoid OutputRead0 = Off, 1 = On
BI883Comm Loss: Purge Exhaust Solenoid OutputRead0 = Off, 1 = On
BI884Comm Loss: Purge Condensing Unit RelayRead0 = Off, 1 = On
BI887Comm Loss: Oil/Refrigerant Pump RelayRead0 = Off, 1 = On
BI888Comm Loss: Oil Tank Heater RelayRead0 = Off, 1 = On
BI889Comm Loss: Motor Winding Temperature 1Read0 = Off, 1 = On
BI890Comm Loss: Motor Winding Temperature 2Read0 = Off, 1 = On
BI891Comm Loss: Motor Winding Temperature 3Read0 = Off, 1 = On
BI892Comm Loss: Inboard Bearing TemperatureRead0 = Off, 1 = On
BI893Comm Loss: Outboard Bearing TemperatureRead0 = Off, 1 = On
BI894Comm Loss: Cprsr Discharge Rfgt TempRead0 = Off, 1 = On
BI895Comm Loss: IGV First Stage ActuatorRead0 = Off, 1 = On
BI896Comm Loss: IGV Second Stage ActuatorRead0 = Off, 1 = On
BI897Comm Loss: Generator Start/Stop RelayRead0 = Off, 1 = On
BI898Comm Loss: Generator Speed Signal OutputRead0 = Off, 1 = On
BI899Comm Loss: Generator Up To Speed InputRead0 = Off, 1 = On
BI900Comm Loss: Generator Fault InputRead0 = Off, 1 = On
BI901Comm Loss: External Ckt LockoutRead0 = Off, 1 = On
BI903Purge Regen Cooldown Temp Too HighRead0 = Off, 1 = On
BI904Purge Regen Cooldown Temp Too High Ckt2Read0 = Off, 1 = On
BI905Restart InhibitRead0 = Off, 1 = On
BI906Restart Inhibit Ckt2Read0 = Off, 1 = On
BI909AFD Contactor Interrupt FailureRead0 = Off, 1 = On
BI910AFD Contactor Interrupt Failure Ckt2Read0 = Off, 1 = On
BI911High Evaporator Refrigerant TemperatureRead0 = Off, 1 = On
BI912High Evaporator Refrigerant Temperature Ckt2Read0 = Off, 1 = On
BI914Software Error 1001Read0 = Off, 1 = On
BI915Software Error 1004Read0 = Off, 1 = On
BI917Comm Loss: AFD Speed Signal VDC OutputRead0 = Off, 1 = On
BI918Comm Loss: Oil Cooler SolenoidRead0 = Off, 1 = On
BI919Comm Loss: Oil Cooler SolenoidRead0 = Off, 1 = On
BI920Comm Loss: Oil Tank Heater 4E1 RelaRead0 = Off, 1 = On
BI921Comm Loss: Oil Tank Heater 4E1 RelayRead0 = Off, 1 = On
BI922Comm Loss: Oil Tank Heater 4E2 RelayRead0 = Off, 1 = On
BI923Comm Loss: Oil Tank Heater 4E2 RelayRead0 = Off, 1 = On
BI924Comm Loss: Oil Vent LineRead0 = Off, 1 = On
BI925Comm Loss: Oil Vent LineRead0 = Off, 1 = On
BI926Comm Loss: Outboard Bearing Pad Temp 1Read0 = Off, 1 = On
BI927Comm Loss: Outboard Bearing Pad Temp 1Read0 = Off, 1 = On
BI928Comm Loss: Outboard Bearing Pad Temp 2Read0 = Off, 1 = On
BI929Comm Loss: Outboard Bearing Pad Temp 2Read0 = Off, 1 = On
BI930Comm Loss: Outboard Bearing Pad Temp 3Read0 = Off, 1 = On
BI931Comm Loss: Outboard Bearing Pad Temp 3Read0 = Off, 1 = On
BI932High Outboard Bearing Pad Temperature 1Read0 = Off, 1 = On
BI933High Outboard Bearing Pad Temperature 1Read0 = Off, 1 = On
BI934High Outboard Bearing Pad Temperature 2Read0 = Off, 1 = On
BI935High Outboard Bearing Pad Temperature 2Read0 = Off, 1 = On
BI936High Outboard Bearing Pad Temperature 3Read0 = Off, 1 = On
BI937High Outboard Bearing Pad Temperature 3Read0 = Off, 1 = On
BI938Outboard Bearing Pad Temp 1 SensorRead0 = Off, 1 = On
BI939Outboard Bearing Pad Temp 1 SensorRead0 = Off, 1 = On
BI940Outboard Bearing Pad Temp 2SensorRead0 = Off, 1 = On
BI941Outboard Bearing Pad Temp 2SensorRead0 = Off, 1 = On
BI942Outboard Bearing Pad Temp 3SensorRead0 = Off, 1 = On
BI943Outboard Bearing Pad Temp 3 SensorRead0 = Off, 1 = On
BI944Inverted Evaporator Water TemperatureRead0 = Off, 1 = On
BI945Inverted Condenser Water TemperatureRead0 = Off, 1 = On
BI946Inverted Evaporator Approach Temperature Ckt1Read0 = Off, 1 = On
BI947Inverted Condenser Approach Temperature Ckt1Read0 = Off, 1 = On
BI948Inverted Evaporator Approach Temperature Ckt2Read0 = Off, 1 = On
BI949Inverted Condenser Approach Temperature Ckt2Read0 = Off, 1 = On
BV1BAS Base Loading EnableWrite0 = Disable, 1 = Enable
BV2BAS Diagnostic ResetWrite0 = False (Reset, No), 1 = True (Reset, Yes)
MI1Chiller Running StatusRead1 = Not Running, 2 = Starting, 3 = Running, 4 = Stopping
MI2Chiller Control ModeRead1 = Cool, 2 = Heat, 3 = Ice, 4 = Free Cooling
MI3Setpoint SourceRead1 = BAS/Ext/FP, 2 = Ext/FP, 3 = Front Panel
MI4Active Chilled Water Setpoint SourceRead1 = Front Panel, 2 = External, 3 = Ice Machine, 4 = BAS
MI5Active Current Limit Setpoint SourceRead1 = Front Panel, 2 = External, 3 = Ice Machine, 4 = BAS
MI6Active Hot Water Setpoint SourceRead1 = Front Panel, 2 = External, 3 = Ice Machine, 4 = BAS
MI7Active Base Loading Setpoint SourceRead1 = Front Panel, 2 = External, 3 = Ice Machine, 4 = BAS
MI8Front Panel Auto/StopRead1 = Stop, 2 = Auto
MI9Front Panel Chiller Control ModeRead1 = Cool, 2 = Heat, 3 = Ice, 4 = Free Cooling
MI10External Auto StopRead1 = Off, 2 = Auto
MI11Compressor Running Ckt1Read1 = Stopped, 2 = Running, 3 = Arm
MI12Compressor Running Ckt2Read1 = Stopped, 2 = Running, 3 = Arm
MI13Refrigerant TypeRead0 = R11, 1 = R12, 2 = R22, 3 = R123, 4 = R134a, 5 = R407C, 6 = R410A, 7 = R113, 8 = R114, 9 = R500, 10 = R502, 11 = R404A, 12 = R513A, 13 = R1233zd(E), 14 = R514A, 15 = R1234ze-(E)
MVmin1BAS Chiller Auto Stop CommandWrite1 = Stop, 2 = Auto
MVmin2BAS Chiller Mode CommandWrite1 = Cool, 2 = Heat, 3 = Ice, 4 = Free Cool
MV3Circuit Lockout Ckt1Write0 = Auto, 1 = Lock
MV4Circuit Lockout Ckt2Write0 = Auto, 1 = Lock

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. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the Symbio 800 CenTraVac Simplex (UC800) 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 800 CenTraVac Simplex (UC800)

How many BACnet points does the Trane Symbio 800 CenTraVac Simplex (UC800) have?

This list has 526 BACnet objects: 148 analog inputs, 4 analog values, 355 binary inputs, 2 binary values, 13 multi-state inputs, 4 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Trane Symbio 800 CenTraVac Simplex (UC800) BACnet points are writable?

10 of the 526 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 800 CenTraVac Simplex (UC800) BACnet documentation?

The source is Symbio 800 Integration Points List BACnet - CTV-Simplex (UC800) (BAS-PTS029A-EN), revision 12/6/2024, published free by Trane at https://elibrary.tranetechnologies.com/public/commercial-hvac/Literature/Points%20List/BAS-PTS029A-EN_12062024.pdf.

What are the minimum BACnet points to integrate the Trane Symbio 800 CenTraVac Simplex (UC800)?

Start with MV 1 BAS Chiller Auto Stop Command (BMS auto/stop command (1 = Stop, 2 = Auto)); MV 2 BAS Chiller Mode Command (Cool/heat/ice/free-cooling mode command); AV 1 BAS Chilled Water Setpoint (Chilled water setpoint from the BMS); AV 2 BAS Current Limit Setpoint (Current limit from the BMS, % RLA); BI 1 Chiller Running (Chiller on/off status); BI 12 Local Setpoint Control (Shows if local setpoints override BAS setpoints); AI 8 Evap Leaving Water Temp (Leaving chilled water temperature); AI 5 Calculated Chiller Capacity (Calculated cooling capacity); BI 10 Alarm Present (Any active alarm on the chiller).

How do I enable BMS control of the Trane Symbio 800 CenTraVac Simplex (UC800)?

MV 1 BAS Chiller Auto Stop Command (1 = Stop, 2 = Auto; relinquish default Auto) is the BMS auto/stop; with it at Auto the chiller runs when its own run conditions are met. MI 10 External Auto Stop reports the hardwired external auto/stop input, and BI 11 Chiller In Auto shows whether the chiller is enabled to run. The documents don't say how the two combine or how to hand setpoint control to the BAS; BI 12 Local Setpoint Control shows when the chiller is using local setpoints instead of BAS setpoints, and MI 4 Active Chilled Water Setpoint Source shows Front Panel, External, Ice Machine or BAS.

How do I check these points on the real Symbio 800 CenTraVac Simplex (UC800)?

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: Symbio 800 Integration Points List BACnet - CTV-Simplex (UC800) · BAS-PTS029A-EN · rev. 12/6/2024. Object names, instances and units are reproduced as published; descriptions are our own.