Easy BACnet- Home
- BACnet points lists
- Greenheck
- Make-Up Air Microprocessor Controller (MUA v4.1)
Make-up air unit controller · BACnet points list
Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) BACnet points list
Updated 6 November 2026
Greenheck's make-up air controller (program v4.1) offers BACnet MS/TP, BACnet IP, Modbus RTU and Modbus TCP. The BMS can enable the unit, command occupancy, reset alarms, write occupied and unoccupied temperature setpoints, supply limits, lockouts, static pressure and damper setpoints, take over the supply fan and outdoor air damper and send sensor values while a watchdog is kept alive. Read-only objects cover temperatures, outputs, unit status mode, latest alarm and bit-packed status and alarm words.
This page lists 118 BACnet objects for the Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) — 46 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Greenheck’s own free documentation, linked below.
- Manufacturer
- Greenheck
- Model
- Make-Up Air Microprocessor Controller (MUA v4.1)
- Equipment
- Make-up air unit controller
- Equipment type
- Rooftop units, AHUs & DOAS
- BACnet objects
- 118 (46 writable)
- Transport
- BACnet MS/TP, BACnet IP
- Firmware
- MUA v4.1
- Also known as
- 487036, Document 487036, MUA v4.1, Greenheck make-up air controller, c.pCO
Reference only, provided as-is: verify against Greenheck’s current documentation and the live device before use. Not official Greenheck information. Terms of use.
BMS integration notes: Greenheck Make-Up Air Microprocessor Controller (MUA v4.1)
With BACnet licensed and the protocol set in Network Settings, enable the unit with BV 2, command occupancy with BV 3, write the occupied temperature setpoint AV 1 and reset alarms with BV 4. Keep the BV 1 watchdog toggling if the BMS sends sensor values or controls the fan or damper. Monitor Unit_Status_Mode (AV 41), supply temperature, Global_Alarm (BV 19) and LatestAlm.
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 |
|---|---|---|---|
| BV 2 | System_Enable | Enables or disables the unit | Write |
| BV 3 | BMS_Occupancy_Command | Occupancy; Active = Unoccupied, Inactive = Occupied | Write |
| AV 1 | Temperature_Setpoint | Occupied temperature setpoint | Write |
| BV 1 | BMS_Watchdog | Heartbeat when BMS controls fans or sensors | Write |
| BV 4 | Reset_All_Alarms | Remote alarm reset | Write |
| AV 41 | Unit_Status_Mode | Current operating mode code | Read |
| AI 2 | Supply_Temp_Analog_Input | Supply (discharge) air temperature | Read |
| BV 19 | Global_Alarm | Alarm output (any or shutdown alarms) | Read |
| IV 9 | LatestAlm | Most recent alarm code | Read |
Enable & remote start
BV 2 System_Enable enables or disables the unit; BV 3 BMS_Occupancy_Command sets occupancy (Active = Unoccupied).
Heartbeat & communication loss
BV 1 BMS_Watchdog must be toggled by the BMS within the timeout delay (15 minutes by default, adjustable) whenever the BMS replaces a hardwired sensor (or takes over fan speed or damper control). If the timer expires, the controller alarms (BMS Offline) and falls back to its hardwired sensors and local control until the BMS returns. The watchdog status is shown on a read-only BV.
Sensors & values from the BMS
Set the source-select BV to BMS (BV 6 outside temp, BV 9/10 CO2, BV 12 space static, BV 13 space temp), then write the matching *_from_BMS value (AV 30, 33, 34, 36, 37). BV 14 and BV 15 hand supply fan speed and damper position to the BMS. The watchdog must be kept alive.
Network setup
- BMS protocol (BACnet MS/TP, BACnet IP, Modbus RTU or Modbus TCP) and its settings are in the Network Settings menu; the service password 1000 is needed to change them.
- After changing BACnet MS/TP or IP settings, enable 'Save Settings' and reboot the controller (cycle power or hold the main menu button 3 seconds).
- BACnet must be licensed on the controller; alarm 20 'BACnet License Not Installed' means it is not.
Watch out for
- Status and alarm words (IV and paired AV objects) are bit-packed; decode them with the bit tables in the manual.
- Remote sensor values are only used while their source-select BV is set to BMS and the watchdog is alive.
- Alarm 54 'BMS Frequent Writes' means the BMS writes too often; reduce the write rate.
Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AI | 1 | Space_Temp_Analog_Input | Space Temperature | °F | Read | |
| AImin | 2 | Supply_Temp_Analog_Input | Supply Temperature | °F | Read | |
| AI | 3 | Outside_Air_Temp_Analog_Input | Outside Air Temperature | °F | Read | |
| AI | 6 | Space_RH_Analog_Input | Space % Relative Humidity | Read | %RH | |
| AI | 9 | Space_Static_Pressure_Analog_Input | Space Static Pressure | in. w.c. | Read | |
| AI | 10 | Supply_Duct_Static_Pressure_Analog_Input | Supply Duct Static Pressure | in. w.c. | Read | |
| AI | 11 | Space_CO2_1_Analog_Input | Space CO2 ppm | ppm | Read | |
| AI | 12 | Return_CO2_Analog_Input | Return CO2 ppm | ppm | Read | |
| AI | 22 | Aux_In_Customer_1 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 23 | Aux_In_Customer_2 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 24 | Aux_In_Customer_3 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 25 | Aux_In_Customer_4 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 26 | Aux_In_Customer_5 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 27 | Aux_In_Customer_6 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 28 | Aux_In_Customer_7 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 29 | Aux_In_Customer_8 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 30 | Aux_In_Customer_9 | Customer defined auxiliary input (units selectable) | Read | ||
| AI | 31 | Aux_In_Customer_10 | Customer defined auxiliary input (units selectable) | Read | ||
| AVmin | 1 | Temperature_Setpoint | Occupied Temperature Setpoint | °F | Write | |
| AV | 2 | Temperature_Heat_Cool_Deadband | Occupied Spt Deadband - Space/Return Reset | Δ°F | Write | |
| AV | 3 | Temperature_Setpoint_Unoccupied | Unoccupied Temperature Setpoint | °F | Write | |
| AV | 4 | Temperature_Heat_Cool_Deadband_Unoccupied | Unoccupied Spt Deadband - Space/Return Reset | Δ°F | Write | |
| AV | 5 | Supply_Temperature_Minimum_Cooling_Setpoint | Minimum supply air temperature - Cooling | °F | Write | |
| AV | 6 | Supply_Temperature_Maximum_Cooling_Setpoint | Maximum supply air temperature - Cooling | °F | Write | |
| AV | 7 | Supply_Temperature_Minimum_Heating_Setpoint | Minimum supply air temperature - Heating | °F | Write | |
| AV | 8 | Supply_Temperature_Maximum_Heating_Setpoint | Maximum supply air temperature - Heating | °F | Write | |
| AV | 9 | Economizer_Temp_Enable_Setpoint | Economizer Ambient Temp Enable Setpoint | °F | Write | |
| AV | 13 | Cooling_Lockout_Setpoint | Cooling Ambient Lockout Setpoint | °F | Write | |
| AV | 14 | Heating_Lockout_Setpoint | Heating Ambient Lockout Setpoint | °F | Write | |
| AV | 15 | Economizer_Lockout_Setpoint | Economizer Lockout Setpoint | °F | Write | |
| AV | 16 | Space_Static_Pressure_Setpoint | Space Static Pressure Setpoint | in. w.c. | Write | |
| AV | 17 | Supply_Duct_Static_Pressure_Setpoint | Supply Duct Static Pressure Setpoint | in. w.c. | Write | |
| AV | 18 | Space_CO2_Setpoint | Space CO2 Setpoint | ppm | Write | |
| AV | 19 | Outside_Air_Damper_Minimum_Setpoint_Occ | Occupied Outside Air Damper Min Setpoint | % | Write | |
| AV | 20 | Outside_Air_Damper_Minimum_Setpoint_Unocc | Unoccupied Outside Air Damper Min Setpoint | % | Write | |
| AV | 21 | Heat_Vent_Changeover_Temp | Heat Vent Changeover Setpoint | °F | Write | |
| AV | 22 | Heat_Vent_Changeover_Hysteresis | Heat Vent Changeover Hysteresis (Summer Only) | °F | Write | |
| AV | 23 | HV_Summer_Damper_Setpoint_Occ | Occupied OAD Setpoint when in Summer Mode | % | Write | |
| AV | 24 | HV_Summer_Damper_Setpoint_Unocc | Unoccupied OAD Setpoint when in Summer Mode | % | Write | |
| AV | 25 | HV_Summer_Lockout | Summer Mode Ambient Lockout Setpoint | °F | Write | |
| AV | 26 | HV_Winter_Damper_Setpoint_Occ | Occupied OAD Setpoint when in Winter Mode | % | Write | |
| AV | 27 | HV_Winter_Damper_Setpoint_Unocc | Unoccupied OAD Setpoint when in Winter Mode | % | Write | |
| AV | 28 | Supply_Air_Low_Limit_Setpoint | Low Supply Temp resulting in unit shutdown | °F | Write | |
| AV | 30 | Outside_Temp_from_BMS | Outside Temp from BMS. (Source set to BMS) | °F | Write | |
| AV | 33 | Space_1_CO2_from_BMS | Space CO2 from BMS - source is BMS | ppm | Write | |
| AV | 34 | Return_CO2_from_BMS | Return CO2 from BMS - source is BMS | ppm | Write | |
| AV | 36 | Space_Static_from_BMS | Space Static from BMS - source is BMS | in. w.c. | Write | |
| AV | 37 | Space_Temp_from_BMS | Space Temp from BMS - source is BMS | °F | Write | |
| AV | 38 | SF_Control_Signal_BMS | BMS to control signal for supply fan speed | % | Write | |
| AV | 39 | OAD_Control_Signal_BMS | Allows the BMS to control OAD position | % | Write | |
| AV | 40 | Aux_BMS_Analog_Output_1 | BMS Commanded auxilary analog output (units selectable) | Write | ||
| AVmin | 41 | Unit_Status_Mode | Unit Status Mode - See Table | Read | ||
| AV | 42 | Supply_Temperature_Calculated_Setpoint | Active Supply Temperature Setpoint | °F | Read | |
| AV | 43 | Cooling_1_Ramp_Capacity | Cooling Ramp 1 Status Value | % | Read | |
| AV | 44 | Economizer_Ramp | Economizer Ramp | % | Read | |
| AV | 46 | Heating_Capacity | Heating Ramp | % | Read | |
| AV | 56 | OAD_CFM_BMS | OAD CFM | cfm | Read | |
| AV | 57 | Active_Temperature_Setpoint | Active Temperature Setpoint | °F | Read | |
| AV | 58 | Chilled_Water_1_Valve_Analog_Output | Chilled Water 1 Valve Analog Output | % | Read | |
| AV | 59 | Electric_Heater_1_Analog_Output | Electric Heater 1 Analog Output | % | Read | |
| AV | 60 | Hot_Water_Valve_1_Analog_Output | Hot Water Valve 1 Analog Output | % | Read | |
| AV | 61 | Mod_Gas_Furnace_1_Analog_Output | Mod Gas Furnace 1 Analog Output | % | Read | |
| AV | 62 | Outside_Airflow_Mask | Percentage of Outside Airflow | % | Read | |
| AV | 63 | Supply_Fan_Speed_Analog_Output | Supply Fan Speed Analog Output | % | Read | |
| AV | 64 | Modulating_Compressor_Analog_Output_BMS | Modulating Compressor Analog Output | % | Read | |
| AV | 69 | Active_Cooling_Setpoint | Active Cooling Setpoint - Unoccupied | °F | Read | |
| AV | 70 | Active_Heating_Setpoint | Active Heating Setpoint - Unoccupied | °F | Read | |
| AV | 71 | LatestAlm_Real | Most recent alarm - See Alarm Table | Read | ||
| AV | 72 | Digital_Output_Word_Real_1 | Digital Output Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 73 | Digital_Output_Word_Real_2 | Digital Output Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 74 | Cooling_Alarm_Word_Real_1 | Cooling Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 75 | Cooling_Alarm_Word_Real_2 | Cooling Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 76 | Device_Offline_Word_Real_1 | Device Offline Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 77 | Device_Offline_Word_Real_2 | Device Offline Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 78 | Device_Alarm_Word_Real_1 | Device Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 79 | Device_Alarm_Word_Real_2 | Device Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 80 | Heating_Alarm_Word_Real_1 | Heating Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 81 | Heating_Alarm_Word_Real_2 | Heating Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 82 | Unit_Status_Word_Real_1 | Unit Status Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| AV | 83 | Unit_Status_Word_Real_2 | Unit Status Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| BI | 1 | Exhaust_Fan_1_Status_Digital_Input | Exhaust Fan Status | Read | Active=Active, Inactive=Inactive | |
| BI | 2 | Supply_Fan_1_Status_Digital_Input | Supply Fan Status | Read | Active=Active, Inactive=Inactive | |
| BVmin | 1 | BMS_Watchdog | BMS Watchdog command Used to determine BMS comm status | Write | Active=Active, Inactive=Inactive | |
| BVmin | 2 | System_Enable | Master system enable/disable point | Write | Active=Active, Inactive=Inactive | |
| BVmin | 3 | BMS_Occupancy_Command | Occupancy Command | Write | Active=Unoccupied, Inactive=Occupied | |
| BVmin | 4 | Reset_All_Alarms | Alarm Reset Command | Write | Active=Reset, Inactive=Normal | |
| BV | 6 | Outside_Temp_Source_BMS | Outside Temp Source Selection | Write | Active=BMS, Inactive=Local | |
| BV | 9 | Space_1_CO2_Source_BMS | Space CO2 Source Selection | Write | Active=BMS, Inactive=Local | |
| BV | 10 | Return_CO2_Source_BMS | Return CO2 Source Selection | Write | Active=BMS, Inactive=Local | |
| BV | 12 | Space_Static_Source_BMS | Space Static Source Selection | Write | Active=BMS, Inactive=Local | |
| BV | 13 | Space_Temp_Source_BMS | Space Temp Source Selection | Write | Active=BMS, Inactive=Local | |
| BV | 14 | SF_Control_Source_BMS | Allows the BMS to control supply fan speed | Write | Active=BMS, Inactive=Local | |
| BV | 15 | OAD_Control_Source_BMS | Allows the BMS to control OAD position | Write | Active=BMS, Inactive=Local | |
| BV | 16 | Aux_BMS_Digital_Output_1 | BMS Commanded auxilary digital output | Write | Active=Active, Inactive=Inactive | |
| BV | 17 | Aux_BMS_Digital_Output_2 | BMS Commanded auxilary digital output | Write | Active=Active, Inactive=Inactive | |
| BV | 18 | Occupied | Occupancy | Read | Active=Occupied, Inactive=Unoccupied | |
| BVmin | 19 | Global_Alarm | Alarm Output - Any or Shutdown Selectable | Read | Active=Alarm, Inactive=Normal | |
| BV | 20 | BMS_Watchdog_Active | Status of the BMS Watchdog Ping | Read | Active=Active, Inactive=Inactive | |
| BV | 21 | Heat_Vent_Mode_Active | Current Heat Vent Mode | Read | Active=Summer, Inactive=Winter | |
| BV | 22 | Supply_Fan_1_Alarm.Active | Supply Fan Alarm Active | Read | Active=Alarm, Inactive=Normal | |
| BV | 23 | Exhaust_Fan_1_Alarm.Active | Exhaust Fan Alarm Active | Read | Active=Alarm, Inactive=Normal | |
| BV | 25 | Fire_Safety_Shutdown_Alarm.Active | Fire Safety Alarm Active | Read | Active=Alarm, Inactive=Normal | |
| BV | 26 | Refrigerant_Leak_Alarm.Active | Refrigerant Leak Alarm Active | Read | Active=Alarm, Inactive=Normal | |
| IV | 1 | Temperature_Reset_Mode | Occupied Reset Mode | Read | 1-Discharge; 2-Space; 3-Return; 4-Outside | |
| IV | 2 | Temperature_Reset_Mode_Unoccupied | Unoccupied Reset Mode | Read | 1-Discharge; 2-Space; 3-Return | |
| IV | 3 | HV_Summer_Operation_Occ | Heat Vent Summer Operation Occupied | Read | 1-Off; 2-Continuous | |
| IV | 4 | HV_Summer_Operation_Unocc | Heat Vent Summer Operation Unoccupied | Read | ||
| IV | 5 | HV_Winter_Operation_Occ | Heat Vent Winter Operation Occupied | Read | 1-Off; 2-Continuous; 3-Cycle | |
| IV | 6 | HV_Winter_Operation_Unocc | Heat Vent Winter Operation Unoccupied | Read | ||
| IV | 7 | Active_Temperature_Reset_Mode | Active Occupied Reset Type Setpoint | Read | 1-Discharge; 2-Space; 3-Return; 4-Outside | |
| IV | 8 | Active_Temperature_Reset_Mode_Unocc | Active Unoccupied Reset Type Setpoint | Read | 1-Discharge; 2-Space; 3-Return | |
| IVmin | 9 | LatestAlm | Most recent alarm - See Alarm Table | Read | ||
| IV | 10 | Digital_Output_Word | Digital Output Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| IV | 11 | Cooling_Alarm_Word | Cooling Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| IV | 12 | Device_Offline_Word | Device Offline Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| IV | 13 | Device_Alarm_Word | Device Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| IV | 14 | Heating_Alarm_Word | Heating Alarm Word - See Table | Read | Bit-packed word (bit table in the manual) | |
| IV | 15 | Unit_Status_Word | Unit Status Word - See Table | Read | Bit-packed word (bit table in the manual) |
No points match these filters.
Object ID lookup: Greenheck Make-Up Air Microprocessor Controller point IDs by name
AI1Space_Temp_Analog_InputAI2Supply_Temp_Analog_InputAI3Outside_Air_Temp_Analog_InputAI6Space_RH_Analog_InputAI9Space_Static_Pressure_Analog_InputAI10Supply_Duct_Static_Pressure_Analog_InputAI11Space_CO2_1_Analog_InputAI12Return_CO2_Analog_InputAI22Aux_In_Customer_1AI23Aux_In_Customer_2AI24Aux_In_Customer_3AI25Aux_In_Customer_4AI26Aux_In_Customer_5AI27Aux_In_Customer_6AI28Aux_In_Customer_7AI29Aux_In_Customer_8AI30Aux_In_Customer_9AI31Aux_In_Customer_10AV1Temperature_SetpointAV2Temperature_Heat_Cool_DeadbandAV3Temperature_Setpoint_UnoccupiedAV4Temperature_Heat_Cool_Deadband_UnoccupiedAV5Supply_Temperature_Minimum_Cooling_SetpointAV6Supply_Temperature_Maximum_Cooling_SetpointAV7Supply_Temperature_Minimum_Heating_SetpointAV8Supply_Temperature_Maximum_Heating_SetpointAV9Economizer_Temp_Enable_SetpointAV13Cooling_Lockout_SetpointAV14Heating_Lockout_SetpointAV15Economizer_Lockout_SetpointAV16Space_Static_Pressure_SetpointAV17Supply_Duct_Static_Pressure_SetpointAV18Space_CO2_SetpointAV19Outside_Air_Damper_Minimum_Setpoint_OccAV20Outside_Air_Damper_Minimum_Setpoint_UnoccAV21Heat_Vent_Changeover_TempAV22Heat_Vent_Changeover_HysteresisAV23HV_Summer_Damper_Setpoint_OccAV24HV_Summer_Damper_Setpoint_UnoccAV25HV_Summer_LockoutAV26HV_Winter_Damper_Setpoint_OccAV27HV_Winter_Damper_Setpoint_UnoccAV28Supply_Air_Low_Limit_SetpointAV30Outside_Temp_from_BMSAV33Space_1_CO2_from_BMSAV34Return_CO2_from_BMSAV36Space_Static_from_BMSAV37Space_Temp_from_BMSAV38SF_Control_Signal_BMSAV39OAD_Control_Signal_BMSAV40Aux_BMS_Analog_Output_1AV41Unit_Status_ModeAV42Supply_Temperature_Calculated_SetpointAV43Cooling_1_Ramp_CapacityAV44Economizer_RampAV46Heating_CapacityAV56OAD_CFM_BMSAV57Active_Temperature_SetpointAV58Chilled_Water_1_Valve_Analog_OutputAV59Electric_Heater_1_Analog_OutputAV60Hot_Water_Valve_1_Analog_OutputAV61Mod_Gas_Furnace_1_Analog_OutputAV62Outside_Airflow_MaskAV63Supply_Fan_Speed_Analog_OutputAV64Modulating_Compressor_Analog_Output_BMSAV69Active_Cooling_SetpointAV70Active_Heating_SetpointAV71LatestAlm_RealAV72Digital_Output_Word_Real_1AV73Digital_Output_Word_Real_2AV74Cooling_Alarm_Word_Real_1AV75Cooling_Alarm_Word_Real_2AV76Device_Offline_Word_Real_1AV77Device_Offline_Word_Real_2AV78Device_Alarm_Word_Real_1AV79Device_Alarm_Word_Real_2AV80Heating_Alarm_Word_Real_1AV81Heating_Alarm_Word_Real_2AV82Unit_Status_Word_Real_1AV83Unit_Status_Word_Real_2BI1Exhaust_Fan_1_Status_Digital_InputBI2Supply_Fan_1_Status_Digital_InputBV1BMS_WatchdogBV2System_EnableBV3BMS_Occupancy_CommandBV4Reset_All_AlarmsBV6Outside_Temp_Source_BMSBV9Space_1_CO2_Source_BMSBV10Return_CO2_Source_BMSBV12Space_Static_Source_BMSBV13Space_Temp_Source_BMSBV14SF_Control_Source_BMSBV15OAD_Control_Source_BMSBV16Aux_BMS_Digital_Output_1BV17Aux_BMS_Digital_Output_2BV18OccupiedBV19Global_AlarmBV20BMS_Watchdog_ActiveBV21Heat_Vent_Mode_ActiveBV22Supply_Fan_1_Alarm.ActiveBV23Exhaust_Fan_1_Alarm.ActiveBV25Fire_Safety_Shutdown_Alarm.ActiveBV26Refrigerant_Leak_Alarm.ActiveIV1Temperature_Reset_ModeIV2Temperature_Reset_Mode_UnoccupiedIV3HV_Summer_Operation_OccIV4HV_Summer_Operation_UnoccIV5HV_Winter_Operation_OccIV6HV_Winter_Operation_UnoccIV7Active_Temperature_Reset_ModeIV8Active_Temperature_Reset_Mode_UnoccIV9LatestAlmIV10Digital_Output_WordIV11Cooling_Alarm_WordIV12Device_Offline_WordIV13Device_Alarm_WordIV14Heating_Alarm_WordIV15Unit_Status_Word
Integration notes
- Appendix E prints a Modbus register beside each BACnet object; only the BACnet side is listed here.
- Status and alarm words are bit-packed (IV objects with AV copies); the bit tables are in the manual.
- Source: Appendix E Points List, manual pages 36-40 (118 objects).
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 Make-Up Air Microprocessor Controller (MUA v4.1) 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 Greenheck Make-Up Air Microprocessor Controller (MUA v4.1)
How many BACnet points does the Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) have?
This list has 118 BACnet objects: 18 analog inputs, 62 analog values, 2 binary inputs, 21 binary values, 15 integer values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) BACnet points are writable?
46 of the 118 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 Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) BACnet documentation?
The source is Microprocessor Controller for Make-up Air - Reference Guide (MUA v4.1) (487036), revision 2024-12, published free by Greenheck at https://webcontent.greenheck.com/atg-cms-v2-prod/docs/default-source/resource-library/installation-manuals/make-up-air/487036_controller_iom.pdf.
What are the minimum BACnet points to integrate the Greenheck Make-Up Air Microprocessor Controller (MUA v4.1)?
Start with BV 2 System_Enable (Enables or disables the unit); BV 3 BMS_Occupancy_Command (Occupancy; Active = Unoccupied, Inactive = Occupied); AV 1 Temperature_Setpoint (Occupied temperature setpoint); BV 1 BMS_Watchdog (Heartbeat when BMS controls fans or sensors); BV 4 Reset_All_Alarms (Remote alarm reset); AV 41 Unit_Status_Mode (Current operating mode code); AI 2 Supply_Temp_Analog_Input (Supply (discharge) air temperature); BV 19 Global_Alarm (Alarm output (any or shutdown alarms)); IV 9 LatestAlm (Most recent alarm code).
How do I enable BMS control of the Greenheck Make-Up Air Microprocessor Controller (MUA v4.1)?
BV 2 System_Enable enables or disables the unit; BV 3 BMS_Occupancy_Command sets occupancy (Active = Unoccupied).
Does the Greenheck Make-Up Air Microprocessor Controller (MUA v4.1) need a BACnet heartbeat or have a communication timeout?
BV 1 BMS_Watchdog must be toggled by the BMS within the timeout delay (15 minutes by default, adjustable) whenever the BMS replaces a hardwired sensor (or takes over fan speed or damper control). If the timer expires, the controller alarms (BMS Offline) and falls back to its hardwired sensors and local control until the BMS returns. The watchdog status is shown on a read-only BV.
Can the BMS supply sensor values to the Greenheck Make-Up Air Microprocessor Controller (MUA v4.1)?
Set the source-select BV to BMS (BV 6 outside temp, BV 9/10 CO2, BV 12 space static, BV 13 space temp), then write the matching *_from_BMS value (AV 30, 33, 34, 36, 37). BV 14 and BV 15 hand supply fan speed and damper position to the BMS. The watchdog must be kept alive.
How do I check these points on the real Make-Up Air Microprocessor Controller (MUA v4.1)?
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 Greenheck BACnet points lists
- Dedicated outdoor air system (DOAS)
Greenheck Dedicated Outdoor Air Systems (DOAS) - BACnet
Greenheck dedicated outdoor air units whose factory controller runs the DOAS_10 program with BACnet licensed.
Also known as: Greenheck DOAS, DOAS, DOAS_10.006, 485940 - Dedicated outdoor air system (DOAS) unit controller
Greenheck DOAS Microprocessor Controller v6.2 (legacy points list)
Greenheck dedicated outdoor air units running the older DOAS v6.2 controller program (July 2021 guide).
Also known as: 485175, Document 485175, DOAS v6.2, Greenheck DOAS controller, c.pCO - Kitchen hood exhaust and supply fan controls
Greenheck Kitchen Controls (GKC) main board
Greenheck Kitchen Controls panels (standard and advanced) for kitchen hoods: up to 8 exhaust fans, 4 supply fans, 8 zones and 16 hood control boards.
Also known as: GKC, Greenheck Kitchen Controls, 484600, GKC-CV, GKC-DCV, Kitchen hood controls - Energy recovery ventilator
Greenheck IVE Indoor Energy Recovery Ventilator (BACnet)
Greenheck IVE indoor energy recovery ventilators with the factory c.pCO Mini controller.
Also known as: IVE, Greenheck IVE, IVE_01.002, 487690, c.pCO Mini - Rooftop unit (RTU) controller
Greenheck RTU Microprocessor Controller (RTU v1.4)
Greenheck (and Valent) packaged rooftop units with the factory microprocessor controller, RTU program v1.4.
Also known as: 487424, Document 487424, 487426, Valent RTU controller, RTU v1.4, Greenheck rooftop unit controller, c.pCO - Fan variable frequency drive (VFD)
Greenheck Vari-Green Drive VGD-100+
Greenheck Vari-Green Drive (VGD-100+) motor drives used on Greenheck fans.
Also known as: VGD, VGD-100, VGD-100+, Vari-Green Drive, 481200 - EC motor with integrated variable frequency drive (fans)
Greenheck Vari-Green Motor (EC Titanium) BACnet MS/TP
Greenheck Vari-Green single-phase and three-phase EC motors (EC Titanium integrated motor drive) controlled over BACnet MS/TP.
Also known as: Vari-Green, Vari-Green Motor, EC Titanium, MN448, Greenheck Vari-Green, Baldor EC Titanium
Source: Microprocessor Controller for Make-up Air - Reference Guide (MUA v4.1) · 487036 · rev. 2024-12. Object names, instances and units are reproduced as published; descriptions are our own.