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Rooftop / constant volume unit controller (Verasys) · BACnet points list

Johnson Controls Verasys VAC1000 Constant Volume Controller BACnet points list

Updated 12 November 2026

Short answer

The VAC1000 runs a constant volume rooftop or air handler. Through the SBH it exposes 129 objects, close to the VAC3000 list but with several MV instances shifted by one and Unit Enable, Emergency Mode and System Mode added: unit status, inputs, occupancy, zone temperature and setpoints, outputs, economizer settings, FDD alarms, lockouts and fan runtime.

This page lists 129 BACnet objects for the Johnson Controls Verasys VAC1000 Constant Volume Controller — 72 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Johnson Controls’s own free documentation, linked below.

Manufacturer
Johnson Controls
Model
Verasys VAC1000 Constant Volume Controller
Equipment
Rooftop / constant volume unit controller (Verasys)
Equipment type
Rooftop units, AHUs & DOAS
BACnet objects
129 (72 writable)
Transport
BACnet IP
Firmware
Not stated
Also known as
VAC1000, Verasys VAC1000, Verasys constant volume controller
Source document
Verasys BACnet over IP Integration User Guide · LIT-12013287 · rev. 2024-03-11
Download CSV 129 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 Johnson Controls’s current documentation and the live device before use. Not official Johnson Controls information. Terms of use.

BMS integration notes: Johnson Controls Verasys VAC1000 Constant Volume Controller

Integration in brief

Integrate through the Verasys Smart Building Hub: enable BACnet routing on the SBH, and the supervisor then sees each system bus device behind the SBH's MS/TP network. Map the enable and occupancy commands, the main setpoints and the status and alarm points.

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 29548Unit EnableUnit enableWrite
MV 29550System ModeSystem modeWrite
MV 29547Occupancy OverrideOccupancy overrideWrite
AV 29522Temperature SetpointTemperature setpointWrite
AV 29508Zone TemperatureZone temperatureRead
MV 29511Zone OccupancyZone occupancyRead
MV 29500Unit StatusUnit statusRead
MV 29506Supply Fan Status BISupply fan status inputRead
MV 29509Service AlarmService alarmRead
MV 29537Econ Fault ActiveEconomizer fault activeRead

Network setup

Watch out for

Johnson Controls Verasys VAC1000 Constant Volume Controller 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.

129 of 129 shown
Type
AnalogMulti-state
Access
Show
Johnson Controls Verasys VAC1000 Constant Volume Controller BACnet Points List
DescriptionStates
MVmin29500Unit StatusRead
MV29501Time ZoneWrite
MV29502LanguageWrite
MV29503UnitsWrite
MV29504FCB Baud RateBaud RateWrite
MV29505Operating Baud RateRead
MVmin29506Supply Fan Status BIRead
MV29507Purge BIRead
MV29508Filter Status BIRead
MVmin29509Service AlarmRead
MV29510Low Temperature Limit Fault BIRead
MVmin29511Zone OccupancyRead
MV29512Occupancy Sensor BIRead
MV29513Temporary OccupancyN/AWrite
MV29514Supply Fan BORead
MV29515Cooling Stage 1 BORead
MV29516Cooling Stage 2 BORead
MV29517Cooling Stage 3 BORead
MV29518Cooling Stage 4 BORead
MV29519Heating Stage 1 BORead
MV29520Heating Stage 2 BORead
MV29521Heating Stage 3 BORead
MV29522Heating Stage 4 BORead
MV29523Compressor Stage 1 BORead
MV29524Compressor Stage 2 BORead
MV29525Reversing Valve BORead
MV29526Reversing Valve PolarityWrite
MV29527Hot Gas Bypass Valve BORead
MV29528Supp Heating Stage 1 BORead
MV29529Supp Heating Stage 2 BORead
MV29530Humidifier BORead
MV29531OAT Cooling Lockout EnabledWrite
MV29532OAT Heating Lockout EnabledWrite
MV29533Rotate Cooling StageWrite
MV29534Rotate EnableWrite
MV29535Rotate Heating StageWrite
MV29536Load Shed ActiveRead
MVmin29537Econ Fault ActiveRead
MV29538Air Temperature Sensor FaultRead
MV29539Econ Operational FaultRead
MV29540Econ Not Operational FaultRead
MV29541Econ Excessive Outside AirRead
MV29542Damper Modulation FaultRead
MV29543Cooling Ineffective AlarmRead
MV29544Heating Ineffective AlarmRead
MV29545Fan Runtime AlarmRead
MV29546Fan Runtime ResetWrite
MVmin29547Occupancy OverrideWrite
MVmin29548Unit EnableWrite
MV29549Emergency ModeWrite
MVmin29550System ModeWrite
AV29500Device AddressAddressWrite
AV29501Device Object IDWrite
AV29502Mixed Air Damper Position AIRead
AV29503Outdoor Air Temperature Sensor AIRead
AV29504Operational Outdoor Air TemperatureRead
AV29505Supply Air Temperature AIRead
AV29506Mixed Air Temperature AIRead
AV29507Return Air Temperature AIRead
AVmin29508Zone TemperatureRead
AV29509Setpoint AdjustRead
AV29510Zone HumidityRead
AV29511Zone Humidity AIRead
AV29512Zone QualityRead
AV29513Return CO2 Sensor AIRead
AV29514Supply Fan Speed AORead
AV29515Mixed Air Damper AORead
AV29516Minimum OA Damper AORead
AV29517Cooling % CommandRead
AV29518Heating % CommandRead
AV29519Heat Pump % CommandRead
AV29520Humidification AORead
AV29521Warm/Cool Adjust RangeWrite
AVmin29522Temperature SetpointWrite
AV29523DeadbandWrite
AV29524Effective Cooling SetpointRead
AV29525Unocc Cooling SetpointWrite
AV29526Standby Cooling SetpointWrite
AV29527Effective Heating SetpointRead
AV29528Standby Heating SetpointWrite
AV29529Unocc Heating SetpointWrite
AV29530Temp Occupancy TimeWrite
AV29531Fan Only SpeedWrite
AV29532Min Fan SpeedWrite
AV29533Max Fan SpeedWrite
AV29534Clg Stage 1 SpeedWrite
AV29535Clg Stage 2 SpeedWrite
AV29536Clg Stage 3 SpeedWrite
AV29537Clg Stage 4 SpeedWrite
AV29538Htg Stage 1 SpeedWrite
AV29539Htg Stage 2 SpeedWrite
AV29540Htg Stage 3 SpeedWrite
AV29541Htg Stage 4 SpeedWrite
AV29542Minimum OA PercentWrite
AV29543Economizer Switchover SetpointWrite
AV29544Low Limit Temperature SetpointWrite
AV29545Supply Air Low Limit SetpointWrite
AV29546CO2 Reset AWrite
AV29547CO2 Reset BWrite
AV29548Min Pos High SetpointWrite
AV29549Failsoft Cooling ValueWrite
AV29550Failsoft Heating ValueWrite
AV29551OA Cooling Lockout SetpointWrite
AV29552OA Heating Lockout SetpointWrite
AV29553Supply Air Setpoint Cooling MinWrite
AV29554Supply Air Setpoint Heating MaxWrite
AV29555Cooling Min On TimeWrite
AV29556Cooling Min Off TimeWrite
AV29557Interstage On Delay TimeWrite
AV29558Interstage Off Delay TimeWrite
AV29559Heating Min On TimeWrite
AV29560Heating Min Off TimeWrite
AV29561Low OA Lockout SetpointWrite
AV29562Compressor Min On TimeWrite
AV29563Compressor Min Off TimeWrite
AV29564Supp Min On TimeWrite
AV29565Supp Min Off TimeWrite
AV29566Humidity SetpointWrite
AV29567Dehumidification SetpointWrite
AV29568Load Shed AdjustWrite
AV29569Load Shed Rate LimitWrite
AV29570Damper Pos ErrorWrite
AV29571Damper Min Pos Fault ToleranceWrite
AV29572Econ Fault DelayWrite
AV29573Heat Cool Alarm DifferentialWrite
AV29574Heat Cool Alarm DelayWrite
AV29575Fan RuntimeRead
AV29576SF Alarm DelayWrite
AV29577Fan Runtime LimitWrite
Object ID lookup: Johnson Controls Verasys VAC1000 Constant Volume Controller 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 Verasys VAC1000 Constant Volume Controller 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 Johnson Controls Verasys VAC1000 Constant Volume Controller

How many BACnet points does the Johnson Controls Verasys VAC1000 Constant Volume Controller have?

This list has 129 BACnet objects: 78 analog values, 51 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Johnson Controls Verasys VAC1000 Constant Volume Controller BACnet points are writable?

72 of the 129 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 Johnson Controls Verasys VAC1000 Constant Volume Controller BACnet documentation?

The source is Verasys BACnet over IP Integration User Guide (LIT-12013287), revision 2024-03-11, published free by Johnson Controls at https://docs.johnsoncontrols.com/bas/api/khub/maps/bQUUXbLn_sJI5F5XzKax0Q/attachments/ETDjFYqCzPvla4mPr0wdlw-bQUUXbLn_sJI5F5XzKax0Q/content.

What are the minimum BACnet points to integrate the Johnson Controls Verasys VAC1000 Constant Volume Controller?

Start with MV 29548 Unit Enable (Unit enable); MV 29550 System Mode (System mode); MV 29547 Occupancy Override (Occupancy override); AV 29522 Temperature Setpoint (Temperature setpoint); AV 29508 Zone Temperature (Zone temperature); MV 29511 Zone Occupancy (Zone occupancy); MV 29500 Unit Status (Unit status); MV 29506 Supply Fan Status BI (Supply fan status input); MV 29509 Service Alarm (Service alarm); MV 29537 Econ Fault Active (Economizer fault active).

How do I check these points on the real Verasys VAC1000 Constant Volume Controller?

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 Johnson Controls BACnet points lists

Source: Verasys BACnet over IP Integration User Guide · LIT-12013287 · rev. 2024-03-11. Object names, instances and units are reproduced as published; descriptions are our own.