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VAV compact controller (actuator + dp sensor) · BACnet points list
Gruner 327V...-BN VAV-Compact (BACnet MS/TP) BACnet points list
Updated 12 November 2026Unofficial source
The 327V...-BN is a compact VAV controller: damper actuator, pressure sensor and flow/pressure controller in one, talking BACnet MS/TP. The BMS writes the setpoint to AO 0 (with SpSource set to Bus) and reads position, actual flow or pressure and status. A bus watchdog drops the actuator to its relinquish default if the BMS stops writing.
This page lists 23 BACnet objects for the Gruner 327V...-BN VAV-Compact (BACnet MS/TP) — 11 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from a copy of Gruner’s documentation hosted by BACnet International, not by Gruner itself, so treat it as unofficial.
- Manufacturer
- Gruner
- Model
- 327V...-BN VAV-Compact (BACnet MS/TP)
- Equipment
- VAV compact controller (actuator + dp sensor)
- Equipment type
- Valves & actuators
- BACnet objects
- 23 (11 writable)
- Transport
- BACnet MS/TP
- Firmware
- FW 100.3.9.2020/GR, SW 114.158.9.2020
- Default device instance
- 1
- Also known as
- 327V-BN, 327V...-BN, Gruner VAV-Compact, Gruner 327V
- Source document
- BACnet PICS - VAV-Compact, Actuators technical data sheet · rev. 25.06.2020 (unofficial copy, hosted by BACnet International)
Reference only, provided as-is: verify against Gruner’s current documentation and the live device before use. Not official Gruner information. Terms of use.
BMS integration notes: Gruner 327V...-BN VAV-Compact (BACnet MS/TP)
Set SpSource (MV 122) to Bus and write the flow/pressure setpoint as a percentage to AO 0. Read AI 7 for actual flow or pressure, AI 4 for position and BI 0 / MI 104 / MI 109 for faults. Keep writing AO 0 within the watchdog time (AV 109).
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 |
|---|---|---|---|
| AO 0 | RelSpBus | Setpoint, % between Min and Max | Command |
| MV 122 | SpSource | Must be 2 (Bus) for BMS control | Write |
| AV 109 | BusFailWatchdog | Bus watchdog timeout, s (0 = off) | Write |
| AI 7 | AbsActual_Value | Actual flow or pressure, unit per MV 201 | Read |
| AI 4 | RelPos | Damper position, % | Read |
| BI 0 | SummaryStatus | Summary status, active = not OK | Read |
| MI 104 | StatusActuator | Actuator fault status | Read |
Enable & remote start
Set MV 122 SpSource to 2 (Bus); with 1 (Analog) the actuator follows the 0/2-10 V wire and AO 0 is out of service.
Heartbeat & communication loss
AV 109 BusFailWatchdog (default 120 s, 0 = off). Every write to AO 0 or MO 1 restarts it; if it expires MI 109 shows Bus Watchdog triggered and the relinquish default applies. It also runs from power-up until the first write.
Network setup
- BACnet MS/TP master; device instance 0-4194302, default 1.
- Up to 6 COV subscriptions.
Watch out for
- MO 1 Override beats the bus setpoint until set back to 1 (None).
- MV 2 commands (adaption, test, reset) return to None by themselves.
Gruner 327V...-BN VAV-Compact (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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| AI | 0 | RelSpAnalog | Analog (wired) setpoint, % | % | Read | |
| AImin | 4 | RelPos | Relative damper position | % | Read | |
| AI | 5 | AbsPos | Absolute position, degrees or mm | ° or mm | Read | |
| AI | 6 | RelActual_Value | Relative actual value (flow or pressure) | % | Read | |
| AImin | 7 | AbsActual_Value | Actual flow or pressure in the unit set by MV 201 | Per MV 201 | Read | |
| AI | 8 | Sens1Analog | Sensor 1 reading when set as active/hybrid | mV / Ohm | Read | |
| AOmin | 0 | RelSpBus | Setpoint from the BMS, % between Min and Max | % | Command | |
| AV | 105 | Min | Minimum setpoint | % | Write | |
| AV | 106 | Max | Maximum setpoint | % | Write | |
| AV | 118 | Mid | Mid setpoint (override position) | % | Write | |
| AV | 233 | AbsNom_value | Nominal value in the unit set by MV 201 | Per MV 201 | Read | |
| AVmin | 109 | BusFailWatchdog | Bus watchdog timeout, 0 = off | s | Write | |
| BImin | 0 | SummaryStatus | Summary of actuator and device status | Read | Inactive=OK, Active=Not OK | |
| BI | 8 | Sens1Switch | Sensor 1 as a switch input | Read | Inactive, Active | |
| MI | 2 | InternalActivity | Test or adaption running | Read | 1=None, 2=Test, 3=Adaption | |
| MImin | 104 | StatusActuator | Actuator fault status | Read | 1=OK, 2=EEPROM Error, 3=Under voltage, 4=Actuator cannot move, 5=Mechanical travel increased | |
| MI | 109 | StatusDevice | Device status | Read | 1=OK, 2=Bus Watchdog triggered | |
| MO | 1 | Override | Override the setpoint with a fixed action | Command | 1=None, 2=Open, 3=Close, 4=Min, 5=Max, 6=Mid, 7=Fast Open, 8=Fast Close, 9=Stop | |
| MV | 2 | Command | Start adaption, test or reset | Write | 1=None, 2=Adaption, 3=Test, 4=Reset | |
| MV | 107 | Sens1Type | Sensor 1 input type | Write | 1=None, 2=Active / Hybrid, 3=Passive 1K, 4=-, 5=Switch | |
| MVmin | 122 | SpSource | Setpoint source: analog wire or bus | Write | 1=Analog, 2=Bus | |
| MV | 123 | ControlMode | Open or closed loop | Write | 1=Open Loop, 2=Closed Loop | |
| MV | 201 | UnitSel | Unit for AI 7 and AV 233 | Write | 1=l/s, 2=m3/h, 3=Pa, 4=WC, 5=cfm |
No points match these filters.
Object ID lookup: Gruner 327V...-BN VAV-Compact point IDs by name
AI0RelSpAnalogAI4RelPosAI5AbsPosAI6RelActual_ValueAI7AbsActual_ValueAI8Sens1AnalogAO0RelSpBusAV105MinAV106MaxAV118MidAV233AbsNom_valueAV109BusFailWatchdogBI0SummaryStatusBI8Sens1SwitchMI2InternalActivityMI104StatusActuatorMI109StatusDeviceMO1OverrideMV2CommandMV107Sens1TypeMV122SpSourceMV123ControlModeMV201UnitSel
Integration notes
- MV 107 state 4 is printed as a dash.
- Sensor 1 objects (AI 8, BI 8) are out of service unless MV 107 selects that sensor type and SpSource is Bus.
- Status-flags rows and COV increments are left out; the doc gives COV increments per object.
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 327V...-BN VAV-Compact (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 Gruner 327V...-BN VAV-Compact (BACnet MS/TP)
How many BACnet points does the Gruner 327V...-BN VAV-Compact (BACnet MS/TP) have?
This list has 23 BACnet objects: 6 analog inputs, 1 analog output, 5 analog values, 2 binary inputs, 3 multi-state inputs, 1 multi-state output, 5 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Gruner 327V...-BN VAV-Compact (BACnet MS/TP) BACnet points are writable?
11 of the 23 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 Gruner 327V...-BN VAV-Compact (BACnet MS/TP) BACnet documentation?
Gruner does not publish it on its own website. This list comes from BACnet PICS - VAV-Compact, Actuators technical data sheet, revision 25.06.2020, a copy hosted by BACnet International at https://www.bacnetinternational.net/catalog/manu/gruner%20ag/BACnet-PICS_01-10-2020.pdf. Ask Gruner or its representative for the current revision.
What are the minimum BACnet points to integrate the Gruner 327V...-BN VAV-Compact (BACnet MS/TP)?
Start with AO 0 RelSpBus (Setpoint, % between Min and Max); MV 122 SpSource (Must be 2 (Bus) for BMS control); AV 109 BusFailWatchdog (Bus watchdog timeout, s (0 = off)); AI 7 AbsActual_Value (Actual flow or pressure, unit per MV 201); AI 4 RelPos (Damper position, %); BI 0 SummaryStatus (Summary status, active = not OK); MI 104 StatusActuator (Actuator fault status).
How do I enable BMS control of the Gruner 327V...-BN VAV-Compact (BACnet MS/TP)?
Set MV 122 SpSource to 2 (Bus); with 1 (Analog) the actuator follows the 0/2-10 V wire and AO 0 is out of service.
Does the Gruner 327V...-BN VAV-Compact (BACnet MS/TP) need a BACnet heartbeat or have a communication timeout?
AV 109 BusFailWatchdog (default 120 s, 0 = off). Every write to AO 0 or MO 1 restarts it; if it expires MI 109 shows Bus Watchdog triggered and the relinquish default applies. It also runs from power-up until the first write.
How do I check these points on the real 327V...-BN VAV-Compact (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.
Source: BACnet PICS - VAV-Compact, Actuators technical data sheet · rev. 25.06.2020. Object names, instances and units are reproduced as published; descriptions are our own.