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Packaged rooftop unit controller (ECO2, 50-130 ton) · BACnet points list

York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) BACnet points list

Updated 4 November 2026

Short answer

The ECO2 controller's IPU 1 microboard speaks BACnet MS/TP and Modbus RTU natively (LON and N2 need an E-Link gateway). The list has read-only analog inputs for air temperatures, static and building pressures, airflows, CO2, refrigerant pressures and the unit mode; binary inputs for compressors, fans, heat stages and faults; and writable analog values for setpoints, limits, BAS reset and sensor inputs, occupancy, unit stop and enable commands.

This page lists 142 BACnet objects for the York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) — 41 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from York’s own free documentation, linked below.

Manufacturer
York
Model
ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)
Equipment
Packaged rooftop unit controller (ECO2, 50-130 ton)
Equipment type
Rooftop units, AHUs & DOAS
BACnet objects
142 (41 writable)
Transport
BACnet MS/TP
Firmware
Not stated
Also known as
YORK ECO2, ECO 2, IPU 1, IPU1, YORK Series 100, Series 100 rooftop, ECO2 Native
Source document
ECO 2 Mod-D,E 50-130 Ton Rooftop Native BACnet & Modbus Object Listings (Microboard IPU 1) · rev. ver J.02
Download CSV 142 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 York’s current documentation and the live device before use. Not official York information. Terms of use.

BMS integration notes: York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)

Integration in brief

Connect to the IPU 1 board on BACnet MS/TP (default 38.4K baud). Command occupancy with AV 88, stop or release the unit with AV 93 and write the occupied zone setpoints; feed zone temperature through AV 40 if the control method is set to comm zone temp. Read supply and return air temperatures, the supply fan status, unit mode and the fault inputs.

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
AV 88OCCUPNCY_CMDOccupancy command (1 = occupied)Write
AV 93UNIT_STOPUnit stop (1 = stopped, 0 = normal)Write
AV 21OCC_ZN_COOLOccupied zone cooling setpointWrite
AV 22OCC_ZN_HEATOccupied zone heating setpointWrite
AI 58UNIT_MODEUnit mode index, 0-20Read
BI 59SUPPLY_FANSupply fan on/offRead
AI 46SUP_AIR_TEMPSupply air temperatureRead
AI 60ZONE_TEMPZone temperatureRead
BI 2COL/HEAT_FLTCooling/heating fault (1 = faulted)Read
BI 54SEN/MSC_FLTSensor/misc fault (1 = fault)Read

Enable & remote start

AV 88 is the occupancy command (0 = unoccupied, 1 = occupied) and AV 93 the unit stop (0 = normal operation, 1 = stopped). BAS reset and BAS sensor inputs (AV 5, AV 28, AV 36, AV 37) must first be enabled at the unit with the service key; AV 40 zone temperature needs the control method set to comm zone temp.

Sensors & values from the BMS

AV 40 ZONE_TMP_BAS feeds zone temperature when the control method is set to comm zone temp. AV 36 and AV 37 feed under-floor humidity and temperature, and AV 5 and AV 28 give BAS duct static and supply air reset; these need enabling with the service key.

Network setup

Watch out for

York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) 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.

142 of 142 shown
Type
Binary
Access
Show
York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) BACnet Points List
DescriptionStates
AI1ACT_DSP_SPActive DSP set pointin. WCRead
AI2ACT_MIN_FLOWActive minimum air flowCFMRead
AI3ACT_MIN_POSActive minimum position%Read
AI4ACT_SAT_SPActive supply air temp setp°FRead
AI5BLD_STAT_PRSBuilding static presin. WCRead
AI6BYPASS_DAMPRBypass damper%Read
AI7CO2_1_OUTCO2 1 (outside)PPMRead
AI8CO2_2_INCO2 2 (inside)PPMRead
AI9COMP_1A_OPERCompressor 1A oper hrshRead
AI10COMP_1B_OPERCompressor 1B oper hrshRead
AI11COMP_2A_OPERCompressor 2A oper hrshRead
AI12COMP_2B_OPERCompressor 2B oper hrshRead
AI13COMP_3A_OPERCompressor 3A oper hrshRead
AI14COMP_3B_OPERCompressor 3B oper hrshRead
AI15COND_FAN_SPDCondenser fan speed (units printed as hrs)hRead
AI16DCT_ST_PR_RTDuct static pres rst%Read
AI17DCT_STAT_PRSDuct static presin. WCRead
AI18ECON_ME_USEDEconomizer method usedRead0=Dry bulb, 1=Single enthalpy, 2=Dual enthalpy
AI19ECON_STATUSEcono sys statusRead0=Installed and inactive, 1=Installed and active, 2=Not installed
AI20EVAP_AIR_TMPEvaporator air temp 1°FRead
AI21EXHAUST_OUTExhaust damper%Read
AI22HEAT_ENT_TMPHeat entering temp°FRead
AI23HEAT_STAGESElectric or staged gas heat stages available, 1-7Read
AI24HEATING_VALVHeating valve%Read
AI25OA_DAMPEROA damper%Read
AI26OA_ENTHALPYOutside air enthalpyBTU/lbRead
AI27OA_FLO_PRS_1OA flow pressure 1in. WCRead
AI28OA_FLO_PRS_2OA flow pressure 2in. WCRead
AI29OA_REL_HUMIDOA relative humidity%Read
AI30OA_TEMPOutside air temp°FRead
AI31PRS_1_DISCHPressures 1 dischargePSIRead
AI32PRS_1_SUCTONPressures 1 suctionPSIRead
AI33PRS_2_DISCHPressures 2 dischargePSIRead
AI34PRS_2_SUCTONPressures 2 suctionPSIRead
AI35PRS_3_DISCHPressures 3 dischargePSIRead
AI36PRS_3_SUCTONPressures 3 suctionPSIRead
AI37RET_AIR_BY_SReturn air bypass active SP%Read
AI38RET_AIR_ENTHReturn air enthalpyBTU/lbRead
AI39RET_AIR_HUMDRA relative humidity%Read
AI40RET_AIR_TEMPReturn air temp°FRead
AI41RET_FAN_OUTExhaust/return fan VFD%Read
AI42RET_FAN_PRESReturn fan pressurein. WCRead
AI43SAT_SUC_TMP1Saturated suction temp 1°FRead
AI44SAT_SUC_TMP2Saturated suction temp 2°FRead
AI45SAT_SUC_TMP3Saturated suction temp 3°FRead
AImin46SUP_AIR_TEMPSupply air temp°FRead
AI47SUP_AIR_TRSTSupply air temp rstV DCRead
AI48SUP_FAN_VFDSupply fan VFD%Read
AI49TEMP_1_SUCTTemperatures 1 suction°FRead
AI50TEMP_1_SUPERTemperature 1 superheat°FRead
AI51TEMP_2_SUCTTemperatures 2 suction°FRead
AI52TEMP_2_SUPERTemperature 2 superheat°FRead
AI53TEMP_3_SUCTTemperatures 3 suction°FRead
AI54TEMP_3_SUPERTemperature 3 superheat°FRead
AI55UND_FLR_DEWPUnder floor slab dew point°FRead
AI56UND_FLR_HUMDUnder floor humidity%Read
AI57UND_FLR_TEMPUnder floor temp°FRead
AImin58UNIT_MODEUnit mode, 0-20 (see ECO2 IOM 100.50-NOM3)Read
AI59VENT_DEM_OUTVentilation demand PI outp%Read
AImin60ZONE_TEMPZone temp°FRead
AI61OA_FLOW_1IAQ dmpr air flows OA flow 1CFMRead
AI62OA_FLOW_2IAQ dmpr air flows OA flow 2CFMRead
AI63OA_FLOW_TOTLOutside air flow totalCFMRead
BI1AMORN_WA_ACTAdapt morn warm actRead
BImin2COL/HEAT_FLTCooling/heating faultRead0=No fault, 1=Faulted
BI3COMP_1ACompressor 1ARead0=Off, 1=On
BI4COMP_1BCompressor 1BRead0=Off, 1=On
BI5COMP_2ACompressor 2ARead0=Off, 1=On
BI6COMP_2BCompressor 2BRead0=Off, 1=On
BI7COMP_3ACompressor 3ARead0=Off, 1=On
BI8COMP_3BCompressor 3BRead0=Off, 1=On
BI9COMP_LPCO_1Compressor LPCO 1Read0=Fault, 1=No fault
BI10COMP_LPCO_2Compressor LPCO 2Read0=Fault, 1=No fault
BI11COMP_LPCO_3Compressor LPCO 3Read0=Fault, 1=No fault
BI12COMP_STAT_1Compressor status 1Read0=Fault, 1=No fault
BI13COMP_STAT_2Compressor status 2Read0=Fault, 1=No fault
BI14COMP_STAT_3Compressor status 3Read0=Fault, 1=No fault
BI15COND_FAN_1ACondenser fan 1A/1Read
BI16COND_FAN_1BCondenser fan 1B/2Read
BI17COND_FAN_2ACondenser fan 2A/3Read
BI18COND_FAN_2BCondenser fan 2B/4Read
BI19COND_FAN_3ACondenser fan 3A/5Read
BI20COND_FAN_3BCondenser fan 3B/6Read
BI21EXH_FAN_STATExhaust fan statusRead0=Off, 1=On
BI22EXHAUST_FANExhaust fanRead0=Off, 1=On
BI23FAN_FAULTFan faultRead0=No fault, 1=Fault
BI24FAN_GFan (G)Read
BI25FILTER_STATSFilter status 1Read0=No fault, 1=Fault
BI26FURN_OUT_1Electric heat stage 1 / gas furnace 1 lowRead
BI27FURN_OUT_2Electric heat stage 2 / gas furnace 1 highRead
BI28FURN_OUT_3Electric heat stage 3 / gas furnace 2 lowRead
BI29FURN_OUT_4Electric heat stage 4 / gas furnace 2 highRead
BI30FURN_OUT_5Electric heat stage 5 / gas furnace 3 lowRead
BI31FURN_OUT_6Electric heat stage 6 / gas furnace 3 highRead
BI32FURN_OUT_7Electric heat stage 7 / gas furnace spare or 1BRead
BI33HW_FRZ_STATHot water frz statusRead0=No fault, 1=Fault
BI52RET_FAN_STATReturn fan statusRead0=Off, 1=On
BImin54SEN/MSC_FLTSensor/misc faultRead0=No fault, 1=Fault
BI55SF_PROV_SWSF proving switchRead0=Run, 1=Stop
BImin59SUPPLY_FANSupply fanRead0=Off, 1=On
BI60UNSTABLE_SYSUnstable systemRead0=Normal operation, 1=Unstable
AV1BULD_PRES_SPBuilding pressure SPin. WCWrite
AV2CO2_OFFSETCO2 offsetPPMWrite
AV3DSP_HI_LIMITDuct static high limitin. WCWrite
AV4DSP_LO_LIMITDuct static low limitin. WCWrite
AV5DSP_RST_BASDuct static pressure reset from BAS (enable with service key)%Write
AV7EL_AIR_TMP_HEvap leaving air temp high°FWrite
AV8EL_AIR_TMP_LEvap leaving air temp low°FWrite
AV9HEATING_SATHeating SAT°FWrite
AV10MAX_BYPASSMaximum bypass%Write
AV11MAX_FLOW_DVMax flow demand ventilationCFMWrite
AV12MECH_LCK_TMPMech clg lockout temp°FWrite
AV13MIN_FLOW_DVMin flow demand ventilationCFMWrite
AV14MIXD_SAT_LIMMixed SAT limit°FWrite
AV15MORN_WUP_RATRAT heating setpoint (morning warm-up)°FWrite
AV16OA_DAMP_POS1OA damper min position 1%Write
AV17OA_DAMP_POS2OA damper min position 2%Write
AV18OA_ENTH_LIMTOA enthalpy limitBTU/lbWrite
AVmin21OCC_ZN_COOLOccupied zone cooling°FWrite
AVmin22OCC_ZN_HEATOccupied zone heating°FWrite
AV23RAT_COOL_SPRAT cooling setp°FWrite
AV26SAT_HIGH_LIMSAT high limit°FWrite
AV27SAT_LOW_LIMSAT low limit°FWrite
AV28SAT_RST_BASSupply air reset from BAS (enable with service key)V DCWrite
AV31STG_1_COOLStg 1 cooling°FWrite
AV32STG_1_HEATStg 1 heating°FWrite
AV33STG_2_COOLStg 2 cooling°FWrite
AV34STG_2_HEATStg 2 heating°FWrite
AV35SYSTEM_STOPSystem stop (compressor systems)Write0=All compressors OK to run
AV36UND_HUMD_BASUnder floor humidity from BAS (enable with service key)%Write
AV37UND_TEMP_BASUnder floor temp from BAS (enable with service key)°FWrite
AV38UOCC_ZN_COOLUn-occupied zone cooling°FWrite
AV39UOCC_ZN_HEATUn-occupied zone heating°FWrite
AV40ZONE_TMP_BASZone temp from BAS (control method = comm zone temp)°FWrite
AV77ACT_SLAB_CTLActive slab controlWrite0=Off, 1=On
AV80DEW_PNT_RSTDew point resetWrite0=Off, 1=On
AV81ECONO_INSTALEconomizer installedWrite0=Off, 1=On
AV86MORN_WUP_CMDMorning warm up cmndWrite0=Off, 1=On
AV87NIGHT_SETBACNight set back (for heating)Write0=Off, 1=On
AVmin88OCCUPNCY_CMDOccupancy commandWrite0=Unoccupied, 1=Occupied
AVmin93UNIT_STOPUnit stopWrite0=Normal operation, 1=Stopped
AV95VENT_ENABLEVentilation enableWrite0=Off, 1=On
Object ID lookup: York ECO2 IPU 1 rooftop 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 ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) 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 York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)

How many BACnet points does the York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) have?

This list has 142 BACnet objects: 63 analog inputs, 41 analog values, 38 binary inputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) BACnet points are writable?

41 of the 142 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.

Where is the official York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP) BACnet documentation?

The source is ECO 2 Mod-D,E 50-130 Ton Rooftop Native BACnet & Modbus Object Listings (Microboard IPU 1), revision ver J.02, published free by York at https://docs.johnsoncontrols.com/chillers/api/khub/documents/q6LHnNOzMSDLOmZUbI44Ug/content.

What are the minimum BACnet points to integrate the York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)?

Start with AV 88 OCCUPNCY_CMD (Occupancy command (1 = occupied)); AV 93 UNIT_STOP (Unit stop (1 = stopped, 0 = normal)); AV 21 OCC_ZN_COOL (Occupied zone cooling setpoint); AV 22 OCC_ZN_HEAT (Occupied zone heating setpoint); AI 58 UNIT_MODE (Unit mode index, 0-20); BI 59 SUPPLY_FAN (Supply fan on/off); AI 46 SUP_AIR_TEMP (Supply air temperature); AI 60 ZONE_TEMP (Zone temperature); BI 2 COL/HEAT_FLT (Cooling/heating fault (1 = faulted)); BI 54 SEN/MSC_FLT (Sensor/misc fault (1 = fault)).

How do I enable BMS control of the York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)?

AV 88 is the occupancy command (0 = unoccupied, 1 = occupied) and AV 93 the unit stop (0 = normal operation, 1 = stopped). BAS reset and BAS sensor inputs (AV 5, AV 28, AV 36, AV 37) must first be enabled at the unit with the service key; AV 40 zone temperature needs the control method set to comm zone temp.

Can the BMS supply sensor values to the York ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)?

AV 40 ZONE_TMP_BAS feeds zone temperature when the control method is set to comm zone temp. AV 36 and AV 37 feed under-floor humidity and temperature, and AV 5 and AV 28 give BAS duct static and supply air reset; these need enabling with the service key.

How do I check these points on the real ECO2 Rooftop Unit, 50-130 ton, Mod D/E (IPU 1, native BACnet MS/TP)?

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 York BACnet points lists

Source: ECO 2 Mod-D,E 50-130 Ton Rooftop Native BACnet & Modbus Object Listings (Microboard IPU 1) · rev. ver J.02. Object names, instances and units are reproduced as published; descriptions are our own.