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Decentralised ventilation unit controller · BACnet points list

TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) BACnet points list

Updated 6 November 2026

Short answer

FSL-CONTROL III is the controller of TROX decentralised façade and parapet ventilation units. It runs on a Schneider Electric M172 controller and connects to BACnet MS/TP or BACnet IP through an interface card. The object list has 62 objects: analogue inputs for temperatures, humidity, air quality, flow rates, valve positions and states, analogue/binary/multistate values for BMS presets (operating mode and type, setpoints, fan stage, fire, window, changeover), and multistate inputs for the current state.

This page lists 62 BACnet objects for the TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) — 24 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from TROX’s own free documentation, linked below.

Manufacturer
TROX
Model
FSL-CONTROL III decentralised ventilation controller (software 8.0)
Equipment
Decentralised ventilation unit controller
Equipment type
Other equipment
BACnet objects
62 (24 writable)
Transport
BACnet MS/TP, BACnet IP
Firmware
Software 8.0 (M172 firmware 596.12)
Also known as
FSL-CONTROL III, FSL-C-III, Schoolair, FSL decentralised ventilation, M172
Source document
FSL-CONTROL III - Installation, commissioning and maintenance manual (software version 8.0) · A00000080122 V4 · rev. 2024-10
Download CSV 62 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 TROX’s current documentation and the live device before use. Not official TROX information. Terms of use.

BMS integration notes: TROX FSL-CONTROL III decentralised ventilation controller (software 8.0)

Integration in brief

Write MV 0 eInOperatingMode (off/automatic) and MV 1 eInOperatingType (standby/unoccupied/occupied) to run the unit from the BMS, and AV 3 fInSpTempRoom or AV 4 fInSpOffsetRoom for the room setpoint. Feed BV 0 bInFire and BV 1 bInWindow if the BMS handles them. Read MI 0/MI 1 for the actual mode, AI 1 for the operating state, AI 27 room temperature and AI 12/AI 13 for the consolidated alarms.

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 0eInOperatingModeMode preset: 2 off, 3 automatic (1 invalid)Write
MV 1eInOperatingTypeOccupancy preset: standby, unoccupied, occupiedWrite
AV 3fInSpTempRoomRoom temperature setpoint from the BMS, °CWrite
BV 0bInFireFire emergency stop from the BMSWrite
MI 0eOutOperatingModeActual mode: off, automatic, manualRead
AI 1fOutOperatingStateOperating state code (standby, control, fire...)Read
AI 27fOutTempRoomRoom temperatureRead
AI 29fOutTempSupplySupply air temperatureRead
AI 13fOutAlarmAConsolidated alarm ARead
AI 12fOutAlarmBConsolidated alarm BRead

Enable & remote start

MV 0 eInOperatingMode presets off (2) or automatic (3); 1 = invalid (no preset). MV 1 eInOperatingType presets standby, unoccupied or occupied.

Sensors & values from the BMS

AV 2 fInPvTempRoom, AV 7 fInPvHumidityRoom, AV 9/AV 10 air quality and AV 13 fInPvTempOda accept values from the BMS.

Network setup

Watch out for

TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) 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.

62 of 62 shown
Type
Binary
Access
Show
TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) BACnet Points List
DescriptionStates
AI0fOutFanLevelOutput fan stageRead1 = 0_Manual 2 = 1_Manual 3 = 2_Manual 4 = 3_Manual 5 = 4_Manual 6 = 5_Manual 7 = 0_AUTO 8 = 1_AUTO 9 = 2_AUTO 10 = 3_AUTO 11 = 4_AUTO 12 = 5_AUTO
AImin1fOutOperatingStateOutput operating stateRead0 = OFF 1 = Standby 2 = Control 3 = Manual 4 = Device Start Up 5 = Shutdown 6 = Fire protection 7 = Frost protection 8 = StartUp Circuity 9 = Error 10 = Valve Kick 11 = Night purge
AI2fOutOperatingTypeOverridingOutput operating mode overrideRead0 = None 1 = Boost 2 = Exercise 3 = Night purge 4 = Fan Force
AI3fOutValvePositionCoolingSlave03Output position cooling valve slave 3%Read
AI4fOutValvePositionHeatingSlave03Output position heating valve slave 3%Read
AI5fOutTempSupplySlave03Output supply air temperature slave 3°CRead
AI6fOutTempSupplySlave02Output supply air temperature slave 2°CRead
AI7fOutValvePositionHeatingSlave02Output position heating valve slave 2%Read
AI8fOutValvePositionCoolingSlave02Output position cooling valve slave 2%Read
AI9fOutValvePositionCoolingSlave01Output position cooling valve slave 1%Read
AI10fOutValvePositionHeatingSlave01Output position heating valve slave 1%Read
AI11fOutTempSupplySlave01Output supply air temperature slave 1°CRead
AImin12fOutAlarmBOutput consolidated alarm BRead
AImin13fOutAlarmAOutput consolidated alarm ARead
AI14fOutValvePositionCoolingMasterOutput position cooling valve master%Read
AI15fOutValvePositionHeatingMasterOutput position heating valve master%Read
AI16fOutSystemDevicesOutput number of connected devicesRead
AI17fOutVolumeFlowExhaustOutput extract air flow ratel/sRead
AI18fOutVolumeFlowOdaOutput supply air flow ratel/sRead
AI19fOutAirQualityRoomOutput air qualityppmRead
AI20fOutHumidityRoomOutput relative humidity%RHRead
AI21fOutTempSetPointSupplyOutput supply air setpoint temperature°CRead
AI22fOutTempRangeHeatingOutput lower limit temperature°CRead
AI23fOutTempRangeCoolingOutput upper limit temperature°CRead
AI24fOutTempOffsetOutput temperature offsetKRead
AI25fOutTempFlowOutput flow temperature°CRead
AI26fOutTempReturnFlowOutput return temperature°CRead
AImin27fOutTempRoomOutput room temperature°CRead
AI28fOutTempOdaOutput outdoor air temperature°CRead
AImin29fOutTempSupplyOutput supply air temperature°CRead
BV5bOutFireOutput fire emergency stopRead0=normal, 1=fire
BV6bOutWindowOutput window contactRead0=closed, 1=open
BV7bOutExtratimeOutput overtimeRead0=inactive, 1=active
MImin0eOutOperatingModeOutput operating modeRead1=Off, 2=Automatic, 3=Manually
MI1eOutOperatingTypeOutput operating typeRead1=None, 2=Standby, 3=Unoccupied, 4=Occupied
MI2eOutVentilationTypeOutput ventilation typeRead1=None, 2=Secondary Air, 3=Outside Air
MI3eOutDemandRoomRequest from roomRead1=None, 2=Heating, 3=Cooling
MI4eOutDemandValveRequest valveRead1=None, 2=Heating, 3=Cooling
AV0fInSpTempRangeCoolingDefault temperature limit cooling°CWrite
AV1fInSpTempRangeHeatingDefault temperature limit heating°CWrite
AV2fInPvTempRoomDefault current room temperature°CWrite
AVmin3fInSpTempRoomDefault room temperature setpoint value°CWrite
AV4fInSpOffsetRoomDefault offset to room temperature setpoint valueKWrite
AV5fInSpTempSupplyDefault supply air temperature setpoint value°CWrite
AV6fInSpOffsetSupplyDefault offset to supply air temperature setpointKWrite
AV7fInPvHumidityRoomDefault relative humidity room air%RHWrite
AV8fInSpFanLevelDefault fan stageWrite1 = Stage 1 2 = Stage 2 3 = Stage 3 4 = Stage 4 5 = Stage 5
AV9fInPvAirQualityqRoomDefault air quality (room)ppmWrite
AV10fInPvAirQualityOdaDefault air quality (external)ppmWrite
AV11fInPvVolumeFlowDifferenceDefault volume flow rate differencel/sWrite
AV12fInPvOperatingTypeOverridingDefault operating mode overrideWrite0 = Inactive 1 = Boost 2 = Class 3 = Night purge 4 = Fan Forced operation (Fume cupboard switching)
AV13fInPvTempOdaDefault outdoor air temperature°CWrite
BVmin0bInFireDefault fire emergency stopWrite0=normal, 1=fire
BV1bInWindowDefault window contactWrite0=closed, 1=open
BV2bInExtratimeDefault overtimeWrite0=inactive, 1=active
BV3bInFilterResetDefault filter changeWrite0=inactive, 1=reset
BV4bInCondensationDefault condensateWrite0=inactive, 1=active
MVmin0eInOperatingModeDefault operating modeWrite1=invalid, 2=off, 3=automatic
MVmin1eInOperatingTypeDefault operating modeWrite1=invalid, 2=standby, 3=unoccupied, 4=occupied
MV2eInChangeOverDefault changeoverWrite1=invalid, 2=warm water, 3=cold water
MV3eInCovModeDefault COV ModeWrite1=invalid, 2=disabled, 3=local broadcast, 4=global broadcast
MV4eInOdaAutomaticOutdoor airWrite1=invalid, 2=inactive, 3=active
Object ID lookup: TROX FSL-CONTROL III decentralised ventilation 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 FSL-CONTROL III decentralised ventilation controller (software 8.0) 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 TROX FSL-CONTROL III decentralised ventilation controller (software 8.0)

How many BACnet points does the TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) have?

This list has 62 BACnet objects: 30 analog inputs, 14 analog values, 8 binary values, 5 multi-state inputs, 5 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) BACnet points are writable?

24 of the 62 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 TROX FSL-CONTROL III decentralised ventilation controller (software 8.0) BACnet documentation?

The source is FSL-CONTROL III - Installation, commissioning and maintenance manual (software version 8.0) (A00000080122 V4), revision 2024-10, published free by TROX at https://www.trox.de/en/downloads/eac245fd534e988d/FSL-C-III_ICM_A00000080122_V4_2024_10_GB_en--1-.pdf.

What are the minimum BACnet points to integrate the TROX FSL-CONTROL III decentralised ventilation controller (software 8.0)?

Start with MV 0 eInOperatingMode (Mode preset: 2 off, 3 automatic (1 invalid)); MV 1 eInOperatingType (Occupancy preset: standby, unoccupied, occupied); AV 3 fInSpTempRoom (Room temperature setpoint from the BMS, °C); BV 0 bInFire (Fire emergency stop from the BMS); MI 0 eOutOperatingMode (Actual mode: off, automatic, manual); AI 1 fOutOperatingState (Operating state code (standby, control, fire...)); AI 27 fOutTempRoom (Room temperature); AI 29 fOutTempSupply (Supply air temperature); AI 13 fOutAlarmA (Consolidated alarm A); AI 12 fOutAlarmB (Consolidated alarm B).

How do I enable BMS control of the TROX FSL-CONTROL III decentralised ventilation controller (software 8.0)?

MV 0 eInOperatingMode presets off (2) or automatic (3); 1 = invalid (no preset). MV 1 eInOperatingType presets standby, unoccupied or occupied.

Can the BMS supply sensor values to the TROX FSL-CONTROL III decentralised ventilation controller (software 8.0)?

AV 2 fInPvTempRoom, AV 7 fInPvHumidityRoom, AV 9/AV 10 air quality and AV 13 fInPvTempOda accept values from the BMS.

How do I check these points on the real FSL-CONTROL III decentralised ventilation controller (software 8.0)?

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 TROX BACnet points lists

Source: FSL-CONTROL III - Installation, commissioning and maintenance manual (software version 8.0) · A00000080122 V4 · rev. 2024-10. Object names, instances and units are reproduced as published; descriptions are our own.