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Laboratory room airflow and pressure controller · BACnet points list

Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) BACnet points list

Updated 6 November 2026

Short answer

Application 6754 controls a laboratory room with a supply damper on a slow-acting actuator, a general exhaust Venturi air valve and hot water reheat, on a Siemens BACnet LCM-OAVS controller over BACnet MS/TP. Supply and general exhaust track each other (and the fume hood exhaust on AI 3) to hold a set airflow offset between exhaust and supply; the temperature loop raises supply airflow for cooling and opens the reheat valve for heating.

This page lists 109 BACnet objects for the Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) — 93 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Siemens’s own free documentation, linked below.

Manufacturer
Siemens
Model
BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)
Equipment
Laboratory room airflow and pressure controller
Equipment type
Thermostats, sensors & meters
BACnet objects
109 (93 writable)
Transport
BACnet MS/TP
Firmware
Not stated
Also known as
Application 6754, App 6754, 570-805PA, LCM-OAVS, Siemens Laboratory Control Module, Siemens lab room pressurization
Source document
BACnet LCM-OAVS Room Pressurization with Slow-acting Damper Supply and Venturi Exhaust and HW Reheat, Application 6754, Application Note · 140-1325 · rev. 2015-07-07
Download CSV 109 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 Siemens’s current documentation and the live device before use. Not official Siemens information. Terms of use.

BMS integration notes: Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)

Integration in brief

Address the controller on the BACnet MS/TP trunk (manually or with auto addressing) and calibrate the airflow devices. The BMS commands occupancy with NET OCC CMD (BO 29), can adjust the occupied and unoccupied airflow offsets, and reads supply, general exhaust and hood airflows, the airflow difference and the pressurization and ventilation 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
BO 29NET OCC CMDOccupancy command from the BMS (OCC/UNOCC)Command
AO 5OCC DIF STPTOccupied exhaust-minus-supply offset, cfmCommand
BO 21OCC.UNOCCResulting occupancy stateCommand
AI 4ROOM TEMPSpace temperatureRead
AI 35SUP AIR VOLMeasured supply airflow, cfmRead
AI 30GEX AIR VOLMeasured general exhaust airflow, cfmRead
AI 74HOOD VOLTotal fume hood exhaust, cfmRead
AI 83VOL DIFFRNCExhaust minus supply airflow, cfmRead
BO 22VOL DIF ALMRoom pressurization (offset) alarmCommand
BO 92VENT ALMVentilation alarmCommand

Enable & remote start

Occupancy comes from NET OCC CMD (BO 29) written by the field panel or BMS, the room occupancy switch on DI 2 or the room unit button, as enabled by OCC ENA (AO 12); the room is unoccupied only when all enabled sources say so. OCC.UNOCC (BO 21) shows the resulting state.

Sensors & values from the BMS

NET ALM CMD (BO 23) lets the field panel or BMS switch the local alarm output; it is always enabled for local annunciation.

Network setup

Watch out for

Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) 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.

109 of 109 shown
Type
Access
Show
Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) BACnet Points List
DescriptionStates
AO1CTLR ADDRESSController MS/TP addressCommand
AO2APPLICATIONApplication number running in the controllerCommand
AO3TEMP OFFSETRoom temperature calibration offset°FCommand
AImin4ROOM TEMPRoom temperature from the room unit°FRead
AOmin5OCC DIF STPTVolume differential setpoint, occupiedcfmCommand
AO6UOC DIF STPTVolume differential setpoint, unoccupiedcfmCommand
AO7RM STPT MINLowest setpoint allowed from the room unit°FCommand
AO8RM STPT MAXHighest setpoint allowed from the room unit°FCommand
AO9TEMP CTL VOLSupply airflow wanted for temperature controlcfmCommand
AO10TABLE FLOWAirflow value of the selected valve table pointcfmCommand
AO12OCC ENAEnables the occupancy button and switch (code)Command
AI13ROOM STPTRoom temperature setpoint from the room unit°FRead
AI14AI 4Spare analog input 4%Read
AI15HOOD SIG AI3Total fume hood exhaust signal on AI 3VRead
AO16VENT ALM DELDelay before the ventilation alarmsCommand
AO17ALARM ENASelects which alarms switch DO 7 (code)Command
AO18STARTTemperature loop % where cooling airflow starts to rise%Command
BI19OCC BUTTONRoom unit occupancy button inputRead0=OFF, 1=ON
BOmin21OCC.UNOCCOccupied/unoccupied modeCommand0=OCC, 1=UNOCC
BOmin22VOL DIF ALMRoom pressurization (volume differential) alarmCommand0=OFF, 1=ON
BO23NET ALM CMDAlarm command from the networkCommand0=OFF, 1=ON
BI24OCC SWIT DI2Room occupancy switch input on DI 2Read0=OFF, 1=ON
BO25BUTTON CMDOccupancy request from the room unit buttonCommand0=OCC, 1=UNOCC
AO26GEX P GAINGeneral exhaust flow loop proportional gainCommand
BI27ALM SWIT DI6Room alarm switch input on DI 6Read0=OFF, 1=ON
AO28TRACK MODESupply tracks exhaust or exhaust tracks supply (code)Command
BOmin29NET OCC CMDOccupancy command from the networkCommand0=OCC, 1=UNOCC
AImin30GEX AIR VOLMeasured general exhaust airflowcfmRead
AO31OCC SUP MAXOccupied supply maximum airflowcfmCommand
AO32OCC SUP MINOccupied supply minimum airflowcfmCommand
AO33OCC GEX MAXOccupied general exhaust maximum airflowcfmCommand
AO34OCC GEX MINOccupied general exhaust minimum airflowcfmCommand
AImin35SUP AIR VOLMeasured supply airflowcfmRead
AO36SUP FLO COEFSupply airflow pickup coefficientCommand
AO37REHEAT AO1Reheat valve signal on AO 1VCommand
AO38DIF ALM DBDDeadband around the volume differential setpoint for alarmcfmCommand
AO39DIF ALM DELDelay before the volume differential alarmsCommand
AO40AVS FAILMODEValve action if an air velocity sensor fails (code)Command
BO41DO 1Digital output 1Command0=OFF, 1=ON
BO42DO 2Digital output 2Command0=OFF, 1=ON
BO43DO 3Digital output 3Command0=OFF, 1=ON
BO44DO 4Digital output 4Command0=OFF, 1=ON
BO45TRACK METHODTracking flow or setpointCommand0=STPT, 1=FLOW
BO46DO 5Digital output 5Command0=OFF, 1=ON
BO47ALARM DO7Local alarm output on DO 7Command0=OFF, 1=ON
BO48AUTOZERO DO8Autozero module output on DO 8Command0=OFF, 1=ON
AO49VALVE CMDReheat valve command%Command
BO50GEX VLV STATGeneral exhaust valve calibration statusCommand0=CAL OK, 1=NOTCAL
AO52MAX HOOD VOLHood airflow at a 10 V hood signalcfmCommand
AI53TOTL EXHAUSTTotal room exhaust airflowcfmRead
AO54GEX FLO COEFGeneral exhaust airflow pickup coefficientCommand
AO55AO2Analog output 2VCommand
AO56GEX DMPR AO3General exhaust valve signal on AO 3VCommand
AO57VALVE CLOSEDReheat valve signal voltage when closedVCommand
AO58VALVE OPENReheat valve signal voltage when openVCommand
AO60GEXDUCT AREAGeneral exhaust duct areaft²Command
AO61OTHER SUPFixed supply from other sources in the roomcfmCommand
AO62SUP DMP CMDSupply damper command%Command
AO65ROOM P GAINRoom loop proportional gainCommand
AO66ROOM I GAINRoom loop integral gainCommand
AO67UOC GEX MAXUnoccupied general exhaust maximum airflowcfmCommand
AO68UOC GEX MINUnoccupied general exhaust minimum airflowcfmCommand
AI69TOTL SUPPLYTotal room supply airflowcfmRead
AO70SUP P GAINSupply flow loop proportional gainCommand
AO71UOC SUP MAXUnoccupied supply maximum airflowcfmCommand
AO72UOC SUP MINUnoccupied supply minimum airflowcfmCommand
AO73CTL STPTActive control setpoint°FCommand
AImin74HOOD VOLTotal fume hood exhaust airflowcfmRead
AO76VOLUME STATESelects VAV or constant volume by occupancy (code)Command
BO77DO 6Digital output 6Command0=OFF, 1=ON
AO78CTL TEMPTemperature the controller is controlling to°FCommand
AO79TEMP LOOPOUTTemperature loop output%Command
AImin83VOL DIFFRNCExhaust minus supply airflowcfmRead
AI84AI 5Spare analog input 5°FRead
AO85GEX FLO STPTGeneral exhaust airflow setpoint (calculated)cfmCommand
AO86FAIL LIMITFlow error that triggers the change to flow trackingcfmCommand
BO87CAL GEX VLVStart general exhaust air valve calibrationCommand0=NO, 1=YES
AO88VOL DIF STPTActive volume differential setpointcfmCommand
AO89OTHER EXHFixed exhaust from other sources in the roomcfmCommand
AO90OC V ALM LVLVentilation alarm level, occupiedcfmCommand
AO91UC V ALM LVLVentilation alarm level, unoccupiedcfmCommand
BOmin92VENT ALMVentilation alarmCommand0=OFF, 1=ON
AO93SUP FLO STPTSupply airflow setpoint (calculated)cfmCommand
BO94CAL AIRStart air velocity sensor calibrationCommand0=NO, 1=YES
AO95CAL SETUPCalibration setup codeCommand
AO96CAL TIMERHours between automatic calibrationshCommand
AO97SUPDUCT AREASupply duct areaft²Command
AO98LOOP TIMEControl loop intervalsCommand
AO99ERROR STATUSController error status codeCommand
AO104SENSOR SELRoom unit / sensor select code (additive)Command
AO105VENTURI ACTNormally open/closed action of the air valves (code)Command
AO106MODHTG FLOMinimum supply air velocity before reheat may modulatefpmCommand
AO107DO DIR.REVDigital output direction reverse (additive code)Command
AI108RM RHRoom relative humidity%Read
AO109FAIL TIMETime the flow error must last before flow trackingsCommand
AO110MTR SETUPMotor enable/reverse setup (additive code)Command
AO111SUP DMP POSSupply damper position (calculated)%Command
AO112MTR1 TIMINGMotor 1 full-stroke timesCommand
AO113MTR1 ROT ANGMotor 1 rotation angleCommand
AO117MINHOODVOLTSLowest valid hood signal voltageVCommand
AI118RM CO2Room CO2ppmRead
AO119TABLE VOLTSVoltage value of the selected valve table pointVCommand
AO120V TABLE PTSelects a valve table point to view or editCommand
AO121HI LIMITUpper band where the airflow feedback loop actsCommand
AO122LO LIMITLower band where the airflow feedback loop actsCommand
BO124G OPEN LOOPGeneral exhaust actuator runs open loop (no sensor)Command0=NO, 1=YES
AO125SUP MAX RATESupply maximum rate of changefpmCommand
AO126GEX MAX RATEGeneral exhaust maximum rate of changefpmCommand
BO127PPCL STATEPPCL program loaded or emptyCommand0=EMPTY, 1=LOADED
Object ID lookup: Siemens LCM-OAVS Damper Supply / Venturi Exhaust 6754 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 BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) 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 Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)

How many BACnet points does the Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) have?

This list has 109 BACnet objects: 13 analog inputs, 73 analog outputs, 3 binary inputs, 20 binary outputs. The exact set on a given unit depends on its firmware, installed options and configuration.

Which Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) BACnet points are writable?

93 of the 109 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 Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat) BACnet documentation?

The source is BACnet LCM-OAVS Room Pressurization with Slow-acting Damper Supply and Venturi Exhaust and HW Reheat, Application 6754, Application Note (140-1325), revision 2015-07-07, published free by Siemens at https://sid.siemens.com/api/khub/documents/GQBVpjxeGItnxozj3Km4LA/content.

What are the minimum BACnet points to integrate the Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)?

Start with BO 29 NET OCC CMD (Occupancy command from the BMS (OCC/UNOCC)); AO 5 OCC DIF STPT (Occupied exhaust-minus-supply offset, cfm); BO 21 OCC.UNOCC (Resulting occupancy state); AI 4 ROOM TEMP (Space temperature); AI 35 SUP AIR VOL (Measured supply airflow, cfm); AI 30 GEX AIR VOL (Measured general exhaust airflow, cfm); AI 74 HOOD VOL (Total fume hood exhaust, cfm); AI 83 VOL DIFFRNC (Exhaust minus supply airflow, cfm); BO 22 VOL DIF ALM (Room pressurization (offset) alarm); BO 92 VENT ALM (Ventilation alarm).

How do I enable BMS control of the Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)?

Occupancy comes from NET OCC CMD (BO 29) written by the field panel or BMS, the room occupancy switch on DI 2 or the room unit button, as enabled by OCC ENA (AO 12); the room is unoccupied only when all enabled sources say so. OCC.UNOCC (BO 21) shows the resulting state.

Can the BMS supply sensor values to the Siemens BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)?

NET ALM CMD (BO 23) lets the field panel or BMS switch the local alarm output; it is always enabled for local annunciation.

How do I check these points on the real BACnet LCM-OAVS Room Pressurization - Application 6754 (Slow-acting Supply Damper, Venturi Exhaust, Hot Water Reheat)?

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 Siemens BACnet points lists

Source: BACnet LCM-OAVS Room Pressurization with Slow-acting Damper Supply and Venturi Exhaust and HW Reheat, Application 6754, Application Note · 140-1325 · rev. 2015-07-07. Object names, instances and units are reproduced as published; descriptions are our own.