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Digital VAV diffuser (master unit) · BACnet points list
Acutherm Advantage Digital VAV Diffuser BACnet points list
Updated 28 October 2026
The Advantage is a motorised VAV diffuser: each master unit has its own controller and wall thermostat and can drive up to five drone diffusers with a 0-10 V signal. With the optional native BACnet module each master is a BACnet MS/TP device; drones have no BACnet presence. The BMS overrides setpoint, room temperature and occupancy through the Net* objects rather than writing the room setpoint directly. All objects are AVs and AIs, with codes in place of binary or multistate objects.
This page lists 56 BACnet objects for the Acutherm Advantage Digital VAV Diffuser — 26 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Acutherm’s own free documentation, linked below.
- Manufacturer
- Acutherm
- Model
- Advantage Digital VAV Diffuser
- Equipment
- Digital VAV diffuser (master unit)
- Equipment type
- VAV boxes & fan coils
- BACnet objects
- 56 (26 writable)
- Transport
- BACnet MS/TP
- Firmware
- 3.0.5 Rev A 1027v
- Default device instance
- 100 plus the MAC address (e.g. 101)
- Also known as
- Advantage, ADV, ADVM, ADVS, ADVR, Acutherm Advantage
BMS integration notes: Acutherm Advantage Digital VAV Diffuser
Set each master's MAC (1-99) and device instance from the LCD thermostat, keep 76800 baud, then map the Net* override objects for occupancy and setpoint plus room temperature, load and damper position. Drones follow their master and are not on the network.
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 |
|---|---|---|---|
| AV 30 | Net Occupancy | Occupancy: 0 normal, 1 force occ, 2 force unocc | Write |
| AV 28 | Net Setpoint | Room setpoint from the BMS | Write |
| AV 2 | Occupancy | Current occupancy (0 = Unoccupied, 1 = Occupied) | Read |
| AV 14 | Controller Status | Room load, -100 % cooling to +100 % heating | Read |
| AI 1 | Room Temperature | Room temperature | Read |
| AV 6 | Room Setpoint | Active room setpoint | Read |
| AV 18 | Current Damper Position | Damper position, %; 999 = recalibrating | Read |
| AV 41 | Airflow | Measured airflow (needs the DMS flow sensor) | Read |
Enable & remote start
No enable point. The BMS forces occupancy with AV 30 Net Occupancy (0 = Normal Operation, 1 = Force Occupied, 2 = Force Unoccupied) and sets the room setpoint through AV 28 Net Setpoint. AV 25 overrides the damper (0 = automatic) for balancing.
Sensors & values from the BMS
AV 29 Net Room Temp overrides the room temperature from the BACnet network (default 0). AV 31 Net Lights overrides the room lights output (0 = normal, 1 = on, 2 = off).
Network setup
- BACnet MS/TP on the optional native BACnet module of each master diffuser; drones are not on the network.
- MAC address 1-99, set by DIP switches or (recommended) from the LCD thermostat/setup tool, which overrides the switches.
- Device instance defaults to 100 shown with the MAC as its last two digits (e.g. 101); set it from the LCD thermostat or setup tool.
- Default baud 76800 (also 38400, 19200, 9600). BACnet settings are read only at startup; the controller restarts after a software change, a DIP change needs a power cycle.
- Use twisted pair (CAT5 works) with NET COM connected at every device; 24 VAC polarity must match across the segment.
Watch out for
- AV 6 is read-only; writing the setpoint means writing AV 28 Net Setpoint.
- AV 18 reads 999 while the damper recalibrates.
- AV 25 damper override stays in force until set back to 0.
- Temperatures follow the controller's °F/°C setting.
Acutherm Advantage Digital VAV Diffuser 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 | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | Room Temperature | Current Room Temperature | °F/°C | Read | |
| AI | 2 | N/A | Unused placeholder | Read | ||
| AI | 3 | Supply Air Temperature | Current Supply Air Temperature | °F/°C | Read | |
| AI | 4 | Analog Input J18 | Spare 0-10 V input (J18) | V | Read | |
| AI | 5 | Analog Input 4 | Spare 0-10 V input, IO board AI4 | V | Read | |
| AI | 6 | Analog Input 5 | Spare 0-10 V input, IO board AI5 | V | Read | |
| AI | 7 | Analog Input 6 | Spare 0-10 V input, IO board AI6 | V | Read | |
| AI | 8 | Wireless Signal Strength or N/A | Signal strength from the wireless thermostat | % | Read | |
| AI | 9 | Wireless Battery Code or N/A | Battery code from the wireless thermostat | Read | ||
| AI | 10 | Room CO² | Current CO² at the T-Stat | ppm | Read | |
| AI | 11 | Room Humidity | Current Relative Humidity at the T-Stat | %RH | Read | |
| AV | 1 | Control Model | Setpoint source (thermostat or not connected) | Read | 2=Thermostat Setpoint, 3=T-Stat not connected | |
| AVmin | 2 | Occupancy | Current occupancy state | Read | 0=Unoccupied, 1=Occupied | |
| AV | 3 | Occupancy Source | What set the current occupancy | Read | 0=Occupied Default Mode, 2=Occupied from Contact Closure, 3=Occupied from T-Stat Button Press, 4=Occupied from Motion Sensor, 5=Occupied from Network Override (AV30), 12=Unoccupied from Contact Closure, 14=Unoccupied from Motion Sensor, 15=Unoccupied from Network Override | |
| AV | 4 | Room Setpoint - Low Limit | Lowest user-adjustable room setpoint | °F/°C | Write | |
| AV | 5 | Room Setpoint - High Limit | Highest user-adjustable room setpoint | °F/°C | Write | |
| AVmin | 6 | Room Setpoint | Current room setpoint (limited by AV 4/AV 5) | °F/°C | Read | |
| AV | 7 | Night Heat Setpoint | Unoccupied heating setpoint | °F/°C | Write | |
| AV | 8 | Night Cool Setpoint | Unoccupied cooling setpoint | °F/°C | Write | |
| AV | 9 | Binary Output Application | Spare binary output function | Write | 0=On in heat, 1=On in cooling, 2=On in heat & cool, 3=On in deadband, 4=Room lights (motion stat), 5=Off (override), 6=On (override) | |
| AV | 10 | Binary Output Signal Type | Spare binary output signal type | Read | 1=PWM, 2=PDM, 3=On/Off, 4=PWM (off with hot duct air), 5=PDM (off with hot duct air), 6=On/Off (off with hot duct air) | |
| AV | 11 | Binary Output Status | Spare binary output state (0/1 or 0-100 %) | Read | ||
| AV | 12 | Unoccupied (Night) Damper Position | Damper position held during unoccupied periods | % | Write | |
| AV | 13 | Ping | Write n to make the thermostat beep n times | Write | ||
| AVmin | 14 | Controller Status | Room load (PI): + heating, 0 deadband, - cooling | % | Read | |
| AV | 15 | Proportional Band | Band over which the PI load goes 1-100 % | °F/°C | Write | |
| AV | 16 | Day Differential | Band either side of setpoint treated as satisfied | °F/°C | Write | |
| AV | 17 | Inlet Size | Diffuser inlet size: 6, 8, 10 or 12 in | in | Write | |
| AVmin | 18 | Current Damper Position | Current damper position; 999 = recalibrating | % | Read | |
| AV | 19 | Damper Target | Damper position target | % | Read | |
| AV | 20 | Damper Neutral Supply Position | Damper position when supply air is neutral | % | Write | |
| AV | 21 | Damper Cool Min Position | Minimum damper position in cooling | % | Write | |
| AV | 22 | Damper Cool Max Position | Maximum damper position in cooling | % | Write | |
| AV | 23 | Damper Heat Min Position | Minimum damper position in heating | % | Write | |
| AV | 24 | Damper Heat Max Position | Maximum damper position in heating | % | Write | |
| AV | 25 | Remote Mode Flag (Damper Position Override) | Damper override (remote mode) | Write | 0=Automatic control, 1=Target Cool Min, 2=Target Cool Max, 3=Target Heat Min, 4=Target Heat Max, 5=Target Neutral Airflow, 6=Open Damper 100%, 7=Close Damper (0%) | |
| AV | 26 | Drone Output Voltage | 0-10 V signal to drone diffusers | V | Read | |
| AV | 27 | Aux Analog Output Voltage | Spare voltage output (J17) | V | Read | |
| AVmin | 28 | Net Setpoint | Room setpoint override from the BACnet network | °F/°C | Write | |
| AV | 29 | Net Room Temp | Room temperature override from the BACnet network | °F/°C | Write | |
| AVmin | 30 | Net Occupancy | Occupancy override from the BACnet network | Write | 0=Normal Operation, 1=Force Occupied, 2=Force Unoccupied | |
| AV | 31 | Net Lights | Room lights override from the BACnet network | Write | 0=Normal Operation, 1=Force Lights On, 2=Force Lights Off | |
| AV | 32 | Power Frequency | Supply power frequency | Hz | Write | 50=50 Hz, 60=60 Hz |
| AV | 33 | Contact Closure One Application | Contact closure function on J14 | Write | 0=Not Used, 1=Unoccupied, 2=Occupied, 3=Full Open, 4=Full Close | |
| AV | 34 | Contact Closure One Status | Contact closure state on J14 | Read | 0=Not Contacted, 1=Contacted | |
| AV | 35 | Contact Closure Two Application | Contact closure function on AI4 | Write | 0=Not Used, 1=Unoccupied, 2=Occupied, 3=Full Open, 4=Full Close | |
| AV | 36 | Contact Closure Two Status | Contact closure state on AI4 | Read | 0=Not Contacted, 1=Contacted | |
| AV | 37 | Contact Closure Three Application | Contact closure function on AI5 | Write | 0=Not Used, 1=Unoccupied, 2=Occupied, 3=Full Open, 4=Full Close | |
| AV | 38 | Contact Closure Three Status | Contact closure state on AI5 | Read | 0=Not Contacted, 1=Contacted | |
| AV | 39 | Contact Closure Four Application | Contact closure function on AI6 | Write | 0=Not Used, 1=Unoccupied, 2=Occupied, 3=Full Open, 4=Full Close | |
| AV | 40 | Contact Closure Four Status | Contact closure state on AI6 | Read | 0=Not Contacted, 1=Contacted | |
| AVmin | 41 | Airflow | Measured airflow (DMS flow sensor) | CFM, LPS or CMH | Read | |
| AV | 42 | K Factor | K-factor used to calculate airflow | Write | ||
| AV | 43 | Airflow Sensor Connection Status | Airflow sensor connection status | Read | 0=Not Connected, 1=Connected | |
| AV | 44 | Airflow Units | Airflow units | Read | 1=CFM, 2=LPS, 3=CMH | |
| AV | 45 | Show User Settings | Reserved for manufacturer | Read |
No points match these filters.
Integration notes
- Every object is an AI or AV; occupancy, overrides and contact states are numeric codes in AVs.
- AV 6 Room Setpoint is read-only over BACnet; write AV 28 Net Setpoint to change the setpoint from the BMS.
- AI 8-9 are for the wireless thermostat; AI 10-11 need the CO2/humidity thermostat; AV 2-3 need the occupancy thermostat.
- AV 41-44 apply only with the DMS airflow measurement option.
- Acutherm marks the controller tuning AVs (AV 1, 15-17, 26, 32, 13, 45) as not to be changed without its approval.
- Source title: Manual - List of BACnet Objects, Advantage Digital VAV Diffusers (v001, 12/29/21). Transport and addressing details come from the Advantage installation manual (Manual ADV 200).
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 Advantage Digital VAV Diffuser 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 Acutherm Advantage Digital VAV Diffuser
How many BACnet points does the Acutherm Advantage Digital VAV Diffuser have?
This list has 56 BACnet objects: 11 analog inputs, 45 analog values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Acutherm Advantage Digital VAV Diffuser BACnet points are writable?
26 of the 56 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 Acutherm Advantage Digital VAV Diffuser BACnet documentation?
The source is Manual - List of BACnet Objects: Advantage Digital VAV Diffusers (v001), revision 2021-12-29, published free by Acutherm at https://holyoake.com/wp-content/uploads/2023/03/Manual_ADV_BACNet_001_v001_3.pdf.
What are the minimum BACnet points to integrate the Acutherm Advantage Digital VAV Diffuser?
Start with AV 30 Net Occupancy (Occupancy: 0 normal, 1 force occ, 2 force unocc); AV 28 Net Setpoint (Room setpoint from the BMS); AV 2 Occupancy (Current occupancy (0 = Unoccupied, 1 = Occupied)); AV 14 Controller Status (Room load, -100 % cooling to +100 % heating); AI 1 Room Temperature (Room temperature); AV 6 Room Setpoint (Active room setpoint); AV 18 Current Damper Position (Damper position, %; 999 = recalibrating); AV 41 Airflow (Measured airflow (needs the DMS flow sensor)).
How do I enable BMS control of the Acutherm Advantage Digital VAV Diffuser?
No enable point. The BMS forces occupancy with AV 30 Net Occupancy (0 = Normal Operation, 1 = Force Occupied, 2 = Force Unoccupied) and sets the room setpoint through AV 28 Net Setpoint. AV 25 overrides the damper (0 = automatic) for balancing.
Can the BMS supply sensor values to the Acutherm Advantage Digital VAV Diffuser?
AV 29 Net Room Temp overrides the room temperature from the BACnet network (default 0). AV 31 Net Lights overrides the room lights output (0 = normal, 1 = on, 2 = off).
How do I check these points on the real Advantage Digital VAV Diffuser?
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: Manual - List of BACnet Objects: Advantage Digital VAV Diffusers · v001 · rev. 2021-12-29. Object names, instances and units are reproduced as published; descriptions are our own.