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Multi-brand VRF / split AC BACnet gateway · BACnet points list

CoolAutomation CoolMasterNet BACnet (indoor unit objects) BACnet points list

Updated 28 October 2026

Short answer

CoolMasterNet and the CooLink family connect to the AC manufacturer's indoor-unit bus and serve every indoor unit as the same 16 BACnet objects, over BACnet MS/TP and/or BACnet IP. Instance numbers are built from the unit's virtual address (VA): instance = VA x 256 + object index. Configuration is done with text commands on the gateway's ASCII interface.

This page lists 16 BACnet objects for the CoolAutomation CoolMasterNet BACnet (indoor unit objects) — 12 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from CoolAutomation’s own free documentation, linked below.

Manufacturer
CoolAutomation
Model
CoolMasterNet BACnet (indoor unit objects)
Equipment
Multi-brand VRF / split AC BACnet gateway
Equipment type
VRF & split air conditioners
BACnet objects
16 (12 writable)
Transport
BACnet IP, BACnet MS/TP
Firmware
Not stated
Default device instance
64
Also known as
CoolMasterNet, CooLinkNet, CooLinkHub, CooLinkBridge, CoolAutomation BACnet, LG VRF BACnet gateway, Daikin VRV BACnet gateway, Mitsubishi Electric BACnet gateway, Samsung BACnet gateway, Gree GMV BACnet gateway
Brands covered
LG, Daikin, Mitsubishi Electric, Samsung, Gree, Toshiba, Hitachi, Panasonic, Fujitsu
Source document
BACnet Integration Guidelines - CoolMasterNet, CooLinkNet, CooLinkHub, CooLinkBridge · rev. Rev 0.5, 2019-04-29

Instance calculator. This list prints one unit; the other units follow a formula. CoolAutomation CoolMasterNet / CooLink instance calculator →

Download CSV 16 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 CoolAutomation’s current documentation and the live device before use. Not official CoolAutomation information. Terms of use.

BMS integration notes: CoolAutomation CoolMasterNet BACnet (indoor unit objects)

Integration in brief

Enable BACnet MS/TP on line L3 and/or BACnet IP, run 'va auto' so each indoor unit gets a virtual address, then map each unit's block of objects at VA x 256. Command BV ON/OFF, MV Operation Mode, AV Set Temperature and MV Fan Speed, and read AI Room Temperature and BI HVAC Failure Indication.

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
BV 256ON/OFFStart/stop the indoor unitWrite
MV 257Operation ModeCool/heat/auto/dry/fan mode commandWrite
AV 256Set TemperatureIndoor unit setpoint, °CWrite
MV 256Fan SpeedFan speed command (low/medium/high/auto)Write
AI 256Room TemperatureRoom temp reported by the indoor unit, °CRead
BI 256HVAC Failure IndicationUnit alarm (code in Active_Text)Read

Enable & remote start

BACnet must be enabled on the gateway ('line type L3 BAC' for MS/TP, 'bacnet IP enable' for IP); no BMS enable object is documented.

Network setup

Watch out for

CoolAutomation CoolMasterNet BACnet (indoor unit objects) 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.

16 of 16 shown
Type
Multi-stateOther
Access
Show
CoolAutomation CoolMasterNet BACnet (indoor unit objects) BACnet Points List
DescriptionStates
AImin256Room TemperatureRoom temperature reported by the indoor unit°CRead
AVmin256Set TemperatureIndoor unit setpoint°CWrite
BImin256HVAC Failure IndicationUnit failure; Active_Text carries the failure codeRead0=No Failure, 1=Failure
BI257Demand State (Therm_ON)Thermostat demand (thermo-on)Read
BI258External Terminals StatusState of the unit external terminals inputRead
BVmin256ON/OFFStart/stop the indoor unitWrite0=Off, 1=On
BV257Filter SignFilter-clean indicationWrite
BV258Lock (prohibit) ON/OFF change from WRCBlock on/off changes from the wired remoteWrite
BV259Lock (prohibit) Operation Mode change from WRCBlock mode changes from the wired remoteWrite
BV260Lock (prohibit) Set Temperature change from WRCBlock setpoint changes from the wired remoteWrite
BV261Global Lock (prohibit)Block all wired-remote operationWrite
MVmin256Fan SpeedFan speedWrite1=Low, 2=Medium, 3=High, 4=Auto, 5=Top, 6=Very Low, 7=Super High, 8=HRV Super High, 9=HRV Low FreshUp, 10=HRV High FreshUP
MVmin257Operation ModeOperating modeWrite1=Cool, 2=Heat, 3=Auto, 4=Dry, 5=HAUX, 6=Fan, 7=Heat+HAUX, 9=HRV Auto, 10=HRV Bypass, 11=HRV Heat Exchange, 12=HRV Normal
MV258LouverLouver positionWrite1=Vertical, 2=30 deg, 3=45 deg, 4=60 deg, 5=Horizontal, 6=Auto (Swing), 7=Off, 8=No Louver Control
PIV256Set Temperature low limitLowest setpoint allowed°CWrite
PIV257Set Temperature high limitHighest setpoint allowed°CWrite
Object ID lookup: CoolAutomation CoolMasterNet BACnet, Indoor Units 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 CoolMasterNet BACnet (indoor unit objects) 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 CoolAutomation CoolMasterNet BACnet (indoor unit objects)

How many BACnet points does the CoolAutomation CoolMasterNet BACnet (indoor unit objects) have?

This list has 16 BACnet objects: 1 analog input, 1 analog value, 3 binary inputs, 6 binary values, 3 multi-state values, 2 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.

Which CoolAutomation CoolMasterNet BACnet (indoor unit objects) BACnet points are writable?

12 of the 16 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 CoolAutomation CoolMasterNet BACnet (indoor unit objects) BACnet documentation?

The source is BACnet Integration Guidelines - CoolMasterNet, CooLinkNet, CooLinkHub, CooLinkBridge, revision Rev 0.5, 2019-04-29, published free by CoolAutomation at https://coolautomation.com/Lib/doc/CoolMasterNet/manual/CoolMasterNet-BACnet-guidelines.pdf.

What are the minimum BACnet points to integrate the CoolAutomation CoolMasterNet BACnet (indoor unit objects)?

Start with BV 256 ON/OFF (Start/stop the indoor unit); MV 257 Operation Mode (Cool/heat/auto/dry/fan mode command); AV 256 Set Temperature (Indoor unit setpoint, °C); MV 256 Fan Speed (Fan speed command (low/medium/high/auto)); AI 256 Room Temperature (Room temp reported by the indoor unit, °C); BI 256 HVAC Failure Indication (Unit alarm (code in Active_Text)).

How do I enable BMS control of the CoolAutomation CoolMasterNet BACnet (indoor unit objects)?

BACnet must be enabled on the gateway ('line type L3 BAC' for MS/TP, 'bacnet IP enable' for IP); no BMS enable object is documented.

How do I check these points on the real CoolMasterNet BACnet (indoor unit objects)?

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 CoolAutomation BACnet points lists

Source: BACnet Integration Guidelines - CoolMasterNet, CooLinkNet, CooLinkHub, CooLinkBridge · rev. Rev 0.5, 2019-04-29. Object names, instances and units are reproduced as published; descriptions are our own.