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Thermostat / fan coil controller · BACnet points list
75F MyStat thermostat (BACnet MS/TP server) BACnet points list
Updated 6 November 2026
MyStat can act as a BACnet MS/TP server on its RS-485 port. 75F's mapping sheet lists 117 objects: onboard and sensor-bus temperature, humidity, CO2, pressure and occupancy, relay states, operating and fan status, conditioning mode and fan speed commands, setpoints, deadbands, PI and staging settings, relay/analog output mappings and lock pins.
This page lists 117 BACnet objects for the 75F MyStat thermostat (BACnet MS/TP server) — 82 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from 75F’s own free documentation, linked below.
- Manufacturer
- 75F
- Model
- MyStat thermostat (BACnet MS/TP server)
- Equipment
- Thermostat / fan coil controller
- Equipment type
- VAV boxes & fan coils
- BACnet objects
- 117 (82 writable)
- Transport
- BACnet MS/TP
- Firmware
- Not stated
- Also known as
- MyStat, 75F MyStat, BACnet_Mapping_MyStat
Reference only, provided as-is: verify against 75F’s current documentation and the live device before use. Not official 75F information. Terms of use.
BMS integration notes: 75F MyStat thermostat (BACnet MS/TP server)
Set MV 0 Conditioning Mode and MV 1 Fan Speed, write the heating/cooling setpoints AV 0/AV 1 (2 x °F) and BV 11 for occupancy, then read MI 0/MI 2 status and AI 0-2 room values.
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 0 | Conditioning Mode | Mode: 0 off, 1 auto, 2 heating, 3 cooling | Write |
| MV 1 | Fan Speed | Fan: 0 off, 1 auto, 2 low, 3 medium, 4 high | Write |
| BV 11 | Unoccupied Mode | 0 occupied, 1 unoccupied | Write |
| AV 0 | Set Temperature Heating | Heating setpoint, value = 2 x °F | Write |
| AV 1 | Set Temperature Cooling | Cooling setpoint, value = 2 x °F | Write |
| MI 0 | Operating Mode | Actual: off, heating, cooling | Read |
| MI 2 | Active Fan Speed | Actual fan speed | Read |
| AI 0 | Room Temperature | Room temperature, 0.1 °F | Read |
| AI 1 | Humidity | Room humidity, 0.1 % | Read |
| AI 2 | CO2 | Room CO2, ppm | Read |
Enable & remote start
MV 0 Conditioning Mode sets off/auto/heating/cooling; BV 11 Unoccupied Mode switches between occupied and unoccupied.
Network setup
- Comm Options page: protocol BACnet, address 5 (default), baud 9600 (9600-115200), no parity, 1 stop bit, Max Master 32, Max Info Frames 3.
- The Device ID must be unique in the BACnet system.
Watch out for
- Written values persist in memory; avoid cyclic writes of configuration objects.
- Keep temperature writes inside the configured min/max limits and deadbands.
75F MyStat thermostat (BACnet MS/TP server) 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 | |||||
|---|---|---|---|---|---|---|
| AImin | 0 | Room Temperature | 0.1 °F | Read | ||
| AImin | 1 | Humidity | 0.1 % | Read | ||
| AImin | 2 | CO2 | ppm | Read | ||
| AI | 3 | Pressure | Range -500 - 500 | psi | Read | |
| AI | 4 | Universal Input 5 | Read | |||
| AI | 5 | Ext Sensor Bus Temperature 1 | Read | |||
| AI | 6 | Ext Sensor Bus Temperature 2 | Read | |||
| AI | 7 | Ext Sensor Bus Temperature 3 | Read | |||
| AI | 8 | Ext Sensor Bus Temperature 4 | Read | |||
| AI | 9 | Ext Sensor Bus Humidity 1 | Read | |||
| AI | 10 | Ext Sensor Bus Humidity 2 | Read | |||
| AI | 11 | Ext Sensor Bus Humidity 3 | Read | |||
| AI | 12 | Ext Sensor Bus Humidity 4 | Read | |||
| AI | 13 | Ext Sensor Bus CO2 1 | Read | |||
| AI | 14 | Ext Sensor Bus CO2 2 | Read | |||
| AI | 15 | Ext Sensor Bus CO2 3 | Read | |||
| AI | 16 | Ext Sensor Bus CO2 4 | Read | |||
| AI | 17 | Ext Sensor Bus Pressure 1 | Read | |||
| AI | 18 | Ext Sensor Bus Pressure 2 | Read | |||
| AI | 19 | Ext Sensor Bus Pressure 3 | Read | |||
| AI | 20 | Ext Sensor Bus Pressure 4 | Read | |||
| BI | 0 | Occupancy Status | Read | |||
| BI | 1 | Relay 1 | Read | 0=Off, 1=On | ||
| BI | 2 | Relay 2 | Read | 0=Off, 1=On | ||
| BI | 3 | Relay 3 | Read | 0=Off, 1=On | ||
| BI | 4 | Relay 4 | Read | 0=Off, 1=On | ||
| BI | 5 | Occupancy Status | Read | |||
| BI | 6 | Ext Sensor Bus Occupancy 1 | Read | |||
| BI | 7 | Ext Sensor Bus Occupancy 2 | Read | |||
| BI | 8 | Ext Sensor Bus Occupancy 3 | Read | |||
| BI | 9 | Ext Sensor Bus Occupancy 4 | Read | |||
| BV | 0 | Relay 1 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 1 | Relay 2 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 2 | Relay 3 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 3 | Relay 4 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 4 | Relay 5 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 5 | Analog Out 1 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 6 | Analog Out 2 Enable | Write | 0=Disabled, 1=Enabled | ||
| BV | 7 | Analog Out 1 Pulse Enable | Write | |||
| BV | 8 | Analog Out 2 Pulse Enable | Write | |||
| BV | 9 | Enable Force Occupied | Write | 0=Disabled, 1=Enabled | ||
| BV | 10 | Enable Auto Away | Write | 0=Disabled, 1=Enabled | ||
| BVmin | 11 | Unoccupied Mode | Write | 0=Occupied, 1=Unoccupied | ||
| BV | 12 | Show Centigrade | Write | 0=Disabled, 1=Enabled | ||
| BV | 13 | Enable Onboard Temp/Humi Sensor | Write | |||
| BV | 14 | Enable Onboard CO2/Occu Sensors | Write | |||
| BV | 15 | Display Desired Temp | Write | |||
| BV | 16 | Reboot the Device | Write | |||
| MImin | 0 | Operating Mode | Read | 0=OFF, 1=HEATING, 2=COOLING | ||
| MI | 1 | Active Conditioning Mode | Read | 0=OFF, 1=AUTO, 2=HEATING, 3=COOLING | ||
| MImin | 2 | Active Fan Speed | Read | 0=OFF, 1=AUTO, 2=LOW, 3=MEDIUM, 4=HIGH | ||
| MI | 3 | Occupancy State | Read | |||
| AVmin | 0 | Set Temperature Heating | Range 120-180 (60.0 - 90.0) | 0.5 °F (value = 2 x °F) | Write | |
| AVmin | 1 | Set Temperature Cooling | Range 120-180 (60.0 - 90.0) | 0.5 °F (value = 2 x °F) | Write | |
| AV | 2 | Max Set Temperature Heating | Write | |||
| AV | 3 | Min Set Temperature Heating | Write | |||
| AV | 4 | Max Set Temperature Cooling | Write | |||
| AV | 5 | Min Set Temperature Cooling | Write | |||
| AV | 6 | Temperature Offset | Range -100 - 100 (-10.0 - 10.0) | 0.1 °F | Write | |
| AV | 7 | Heating Deadband | Range 0-100 (0.0-10.0) | 0.1 °F | Write | |
| AV | 8 | Cooling Deadband | Range 0-100 (0.0-10.0) | 0.1 °F | Write | |
| AV | 9 | Min Humidity Setpoint | Write | |||
| AV | 10 | Max Humidity Setpoint | Write | |||
| AV | 11 | Analog Out 1 Min Setting | Write | |||
| AV | 12 | Analog Out 2 Min Setting | Write | |||
| AV | 13 | Analog Out 1 Max Setting | Write | |||
| AV | 14 | Analog Out 2 Max Setting | Write | |||
| AV | 15 | Zone CO2 Dampper Opening Rate | Write | |||
| AV | 16 | Zone CO2 Threshold | Range 0-2000 | ppm | Write | |
| AV | 17 | Zone CO2 Target | Range 0-2000 | ppm | Write | |
| AV | 18 | Proportional Constant | Range 0-100 | 0.01 | Write | |
| AV | 19 | Integral Constant | Range 0-100 | 0.01 | Write | |
| AV | 20 | Proportional Temperature Range | Range 0-100 (0.0-10.0) | 0.1 °F | Write | |
| AV | 21 | Integration Time | Range 5-100 | min | Write | |
| AV | 22 | Unoccupied Setback | Range 10-200 (1.0-20.0) | 0.1 °F | Write | |
| AV | 23 | Heating Deadband Multiplier | Write | |||
| AV | 24 | Relay Activation Hysteresis | Range 1-50 | % | Write | |
| AV | 25 | Analog Fan Speed Multiplier | Range 1-100 (0.1-10) | 0.1 | Write | |
| AV | 26 | Humidity Hysteresis | Range 1-100 | % | Write | |
| AV | 27 | Forced Occupied Time | Range 0-255 | min | Write | |
| AV | 28 | Auto Away Time | Range 0-255 | min | Write | |
| AV | 29 | Auto Away Setback Temperature | Write | |||
| AV | 30 | FCU Aux Heating 1 Activate | Range 10-100 (1.0 - 10.0) | 0.1 °F | Write | |
| AV | 31 | FCU Two-Pipe Heating Threshold | Range 70-130 | °F | Write | |
| AV | 32 | FCU Two-Pipe Cooling Threshold | Range 35-70 | °F | Write | |
| AV | 33 | FCU Water Valve Sampling On Time | Range 0-30 | min | Write | |
| AV | 34 | FCU Water Valve Sampling Wait Time | Range 5-255 | min | Write | |
| AV | 35 | FCU Water Valve Sampling During Loop Deadband On Time | Range 0-30 | min | Write | |
| AV | 36 | FCU Water Valve Sampling During Loop Deadband Wait Time | Range 5-255 | min | Write | |
| AV | 37 | Fail-Safe Time | Range 0-65535 where 0 means fail safe will be disable | min | Write | |
| AV | 38 | Cooling Stage 1 Fan Output | Range 0 - 100 (0.0 - 10.0) | 0.1 V | Write | |
| AV | 39 | Cooling Stage 2 Fan Output | Range 0 - 100 (0.0 - 10.0) | 0.1 V | Write | |
| AV | 40 | Heating Stage 1 Fan Output | Range 0 - 100 (0.0 - 10.0) | 0.1 V | Write | |
| AV | 41 | Heating Stage 2 Fan Output | Range 0 - 100 (0.0 - 10.0) | 0.1 V | Write | |
| AV | 42 | Linear Fan Speed Level Low | Write | |||
| AV | 43 | Linear Fan Speed Level High | Write | |||
| AV | 44 | Staged Fan Speed Level Low | Write | |||
| AV | 45 | Staged Fan Speed Level High | Write | |||
| AV | 46 | Analog Out Fan Default | Write | |||
| AV | 47 | Fan Runtime Post Conditioning | Write | |||
| AV | 48 | Staged Fan Analog Out at Recirculation | Write | |||
| AV | 49 | Installer Lock Pin | Write | |||
| AV | 50 | User Lock Pin | Write | |||
| AV | 51 | Stage Up Timer | Write | |||
| AV | 52 | Stage Down Timer | Write | |||
| MVmin | 0 | Conditioning Mode | Write | 0=OFF, 1=AUTO, 2=HEATING, 3=COOLING | ||
| MVmin | 1 | Fan Speed | Write | 0=OFF, 1=AUTO, 2=LOW, 3=MEDIUM, 4=HIGH | ||
| MV | 2 | Temperature Mode | Write | 0=Single Setpoint, 1=Dual Setpoint Fixed Deadband, 2=Dual Setpoint Variable Deadband | ||
| MV | 3 | HVAC Profile | Write | |||
| MV | 4 | Relay 1 Mapping | Write | None, Cooling Stage 1, Cooling Stage 2, Heating Stage 1, Heating Stage 2, Fan Low Speed, Fan High Speed, Fan Enable, Occupied Enable, Humidifier, Dehumidifier, Externally Mapped, DVC Damper, Compressor Stage 1, Compressor Stage 2, Aux Heating, O- Energize in Cooling, B- Energize in Heating, Water Valve, Fan Low Speed - Ventilation, Cooling Water Valve, Heating Water Valve (listed without numbers) | ||
| MV | 5 | Relay 2 Mapping | Write | None, Cooling Stage 1, Cooling Stage 2, Heating Stage 1, Heating Stage 2, Fan Low Speed, Fan High Speed, Fan Enable, Occupied Enable, Humidifier, Dehumidifier, Externally Mapped, DVC Damper, Compressor Stage 1, Compressor Stage 2, Aux Heating, O- Energize in Cooling, B- Energize in Heating, Water Valve, Fan Low Speed - Ventilation, Cooling Water Valve, Heating Water Valve (listed without numbers) | ||
| MV | 6 | Relay 3 Mapping | Write | None, Cooling Stage 1, Cooling Stage 2, Heating Stage 1, Heating Stage 2, Fan Low Speed, Fan High Speed, Fan Enable, Occupied Enable, Humidifier, Dehumidifier, Externally Mapped, DVC Damper, Compressor Stage 1, Compressor Stage 2, Aux Heating, O- Energize in Cooling, B- Energize in Heating, Water Valve, Fan Low Speed - Ventilation, Cooling Water Valve, Heating Water Valve (listed without numbers) | ||
| MV | 7 | Relay 4 Mapping | Write | None, Cooling Stage 1, Cooling Stage 2, Heating Stage 1, Heating Stage 2, Fan Low Speed, Fan High Speed, Fan Enable, Occupied Enable, Humidifier, Dehumidifier, Externally Mapped, DVC Damper, Compressor Stage 1, Compressor Stage 2, Aux Heating, O- Energize in Cooling, B- Energize in Heating, Water Valve, Fan Low Speed - Ventilation, Cooling Water Valve, Heating Water Valve (listed without numbers) | ||
| MV | 8 | Relay 5 Mapping | Write | None, Cooling Stage 1, Cooling Stage 2, Heating Stage 1, Heating Stage 2, Fan Low Speed, Fan High Speed, Fan Enable, Occupied Enable, Humidifier, Dehumidifier, Externally Mapped, DVC Damper, Compressor Stage 1, Compressor Stage 2, Aux Heating, O- Energize in Cooling, B- Energize in Heating, Water Valve, Fan Low Speed - Ventilation, Cooling Water Valve, Heating Water Valve (listed without numbers) | ||
| MV | 9 | Analog Out 1 Mapping | Write | Cooling, Linear Fan Speed, Heating, Staged Fan Speed, Externally Mapped - Analog, DCV Modulating Damper, Compressor Speed, Fan Speed, Water Modulating Valve, Cooling Modulating Valve, Heating Modulating Valve (listed without numbers) | ||
| MV | 10 | Analog Out 2 Mapping | Write | Cooling, Linear Fan Speed, Heating, Staged Fan Speed, Externally Mapped - Analog, DCV Modulating Damper, Compressor Speed, Fan Speed, Water Modulating Valve, Cooling Modulating Valve, Heating Modulating Valve (listed without numbers) | ||
| MV | 11 | Universal In1 Mapping | Write | Discharge Air Temperature, Generic Alarm N/O, Generic Alarm N/C, Keycard Sensor (AI), Door/Window Sensor N/C - Title24, Door/Window Sensor (AI), Fan Run Status N/O, Fan Run Status N/C, Door/Window Sensor N/O - Title24, Door/Window Sensor N/C, Door/Window Sensor N/O, Keycard Sensor N/O, Keycard Sensor N/C, Chilled Water Supply Temperature, Hot Water Supply Temperature, Current TX (0-10Amps), Current TX (0-20Amps), Current TX (0-50Amps), Voltage Input, Thermistor Input (listed without numbers) |
No points match these filters.
Object ID lookup: 75F MyStat thermostat point IDs by name
AI0Room TemperatureAI1HumidityAI2CO2AI3PressureAI4Universal Input 5AI5Ext Sensor Bus Temperature 1AI6Ext Sensor Bus Temperature 2AI7Ext Sensor Bus Temperature 3AI8Ext Sensor Bus Temperature 4AI9Ext Sensor Bus Humidity 1AI10Ext Sensor Bus Humidity 2AI11Ext Sensor Bus Humidity 3AI12Ext Sensor Bus Humidity 4AI13Ext Sensor Bus CO2 1AI14Ext Sensor Bus CO2 2AI15Ext Sensor Bus CO2 3AI16Ext Sensor Bus CO2 4AI17Ext Sensor Bus Pressure 1AI18Ext Sensor Bus Pressure 2AI19Ext Sensor Bus Pressure 3AI20Ext Sensor Bus Pressure 4BI0Occupancy StatusBI1Relay 1BI2Relay 2BI3Relay 3BI4Relay 4BI5Occupancy StatusBI6Ext Sensor Bus Occupancy 1BI7Ext Sensor Bus Occupancy 2BI8Ext Sensor Bus Occupancy 3BI9Ext Sensor Bus Occupancy 4BV0Relay 1 EnableBV1Relay 2 EnableBV2Relay 3 EnableBV3Relay 4 EnableBV4Relay 5 EnableBV5Analog Out 1 EnableBV6Analog Out 2 EnableBV7Analog Out 1 Pulse EnableBV8Analog Out 2 Pulse EnableBV9Enable Force OccupiedBV10Enable Auto AwayBV11Unoccupied ModeBV12Show CentigradeBV13Enable Onboard Temp/Humi SensorBV14Enable Onboard CO2/Occu SensorsBV15Display Desired TempBV16Reboot the DeviceMI0Operating ModeMI1Active Conditioning ModeMI2Active Fan SpeedMI3Occupancy StateAV0Set Temperature HeatingAV1Set Temperature CoolingAV2Max Set Temperature HeatingAV3Min Set Temperature HeatingAV4Max Set Temperature CoolingAV5Min Set Temperature CoolingAV6Temperature OffsetAV7Heating DeadbandAV8Cooling DeadbandAV9Min Humidity SetpointAV10Max Humidity SetpointAV11Analog Out 1 Min SettingAV12Analog Out 2 Min SettingAV13Analog Out 1 Max SettingAV14Analog Out 2 Max SettingAV15Zone CO2 Dampper Opening RateAV16Zone CO2 ThresholdAV17Zone CO2 TargetAV18Proportional ConstantAV19Integral ConstantAV20Proportional Temperature RangeAV21Integration TimeAV22Unoccupied SetbackAV23Heating Deadband MultiplierAV24Relay Activation HysteresisAV25Analog Fan Speed MultiplierAV26Humidity HysteresisAV27Forced Occupied TimeAV28Auto Away TimeAV29Auto Away Setback TemperatureAV30FCU Aux Heating 1 ActivateAV31FCU Two-Pipe Heating ThresholdAV32FCU Two-Pipe Cooling ThresholdAV33FCU Water Valve Sampling On TimeAV34FCU Water Valve Sampling Wait TimeAV35FCU Water Valve Sampling During Loop Deadband On TimeAV36FCU Water Valve Sampling During Loop Deadband Wait TimeAV37Fail-Safe TimeAV38Cooling Stage 1 Fan OutputAV39Cooling Stage 2 Fan OutputAV40Heating Stage 1 Fan OutputAV41Heating Stage 2 Fan OutputAV42Linear Fan Speed Level LowAV43Linear Fan Speed Level HighAV44Staged Fan Speed Level LowAV45Staged Fan Speed Level HighAV46Analog Out Fan DefaultAV47Fan Runtime Post ConditioningAV48Staged Fan Analog Out at RecirculationAV49Installer Lock PinAV50User Lock PinAV51Stage Up TimerAV52Stage Down TimerMV0Conditioning ModeMV1Fan SpeedMV2Temperature ModeMV3HVAC ProfileMV4Relay 1 MappingMV5Relay 2 MappingMV6Relay 3 MappingMV7Relay 4 MappingMV8Relay 5 MappingMV9Analog Out 1 MappingMV10Analog Out 2 MappingMV11Universal In1 Mapping
Integration notes
- From the help-centre article "MyStat as a BACnet Server" (updated 2026-09-18) and its attachment BACnet_Mapping_MyStat__.xlsx.
- The sheet has no access column; inputs (AI/BI/MI) are listed read-only and values (AV/BV/MV) writable. The article says read/write access depends on the object and configuration.
- Many values are scaled integers: temperatures in 1/10 °F, setpoints as 2 x °F (120-180 = 60.0-90.0 °F).
- Relay, analog output and universal input mapping MVs list their options without numbers.
- BACnet-written values are kept through reboots and power cycles.
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 MyStat thermostat (BACnet MS/TP server) 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 75F MyStat thermostat (BACnet MS/TP server)
How many BACnet points does the 75F MyStat thermostat (BACnet MS/TP server) have?
This list has 117 BACnet objects: 21 analog inputs, 53 analog values, 10 binary inputs, 17 binary values, 4 multi-state inputs, 12 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which 75F MyStat thermostat (BACnet MS/TP server) BACnet points are writable?
82 of the 117 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 75F MyStat thermostat (BACnet MS/TP server) BACnet documentation?
The source is MyStat as a BACnet Server (with BACnet_Mapping_MyStat__.xlsx), revision 2026-09-18, published free by 75F at https://support.75f.io/hc/en-us/articles/51942488899347.
What are the minimum BACnet points to integrate the 75F MyStat thermostat (BACnet MS/TP server)?
Start with MV 0 Conditioning Mode (Mode: 0 off, 1 auto, 2 heating, 3 cooling); MV 1 Fan Speed (Fan: 0 off, 1 auto, 2 low, 3 medium, 4 high); BV 11 Unoccupied Mode (0 occupied, 1 unoccupied); AV 0 Set Temperature Heating (Heating setpoint, value = 2 x °F); AV 1 Set Temperature Cooling (Cooling setpoint, value = 2 x °F); MI 0 Operating Mode (Actual: off, heating, cooling); MI 2 Active Fan Speed (Actual fan speed); AI 0 Room Temperature (Room temperature, 0.1 °F); AI 1 Humidity (Room humidity, 0.1 %); AI 2 CO2 (Room CO2, ppm).
How do I enable BMS control of the 75F MyStat thermostat (BACnet MS/TP server)?
MV 0 Conditioning Mode sets off/auto/heating/cooling; BV 11 Unoccupied Mode switches between occupied and unoccupied.
How do I check these points on the real MyStat thermostat (BACnet MS/TP server)?
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.
Source: MyStat as a BACnet Server (with BACnet_Mapping_MyStat__.xlsx) · rev. 2026-09-18. Object names, instances and units are reproduced as published; descriptions are our own.