Easy BACnet- Home
- BACnet points lists
- Gree
- GMS BACnet Converter (GMS GW) - R series
Split AC BACnet gateway · BACnet points list
Gree GMS BACnet Converter (GMS GW) - R series BACnet points list
Updated 28 October 2026
The GMS GW is a Gree-branded gateway (built by CoolAutomation) that links up to 1 or 12 Gree split indoor units over two RS-485 lines to BACnet/IP or BACnet MS/TP. Every unit gets a common object set (on/off, mode, fan, setpoint, room temperature, locks) plus series-specific objects; this file is the common set plus the R-series extras.
This page lists 32 BACnet objects for the Gree GMS BACnet Converter (GMS GW) - R series — 21 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Gree’s own free documentation, linked below.
- Manufacturer
- Gree
- Model
- GMS BACnet Converter (GMS GW) - R series
- Equipment
- Split AC BACnet gateway
- Equipment type
- VRF & split air conditioners
- BACnet objects
- 32 (21 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- Not stated
- Also known as
- GMS GW 1, GMS GW 12, GMVGMSGW, Gree Mini Split BACnet Converter, CoolAutomation Gree gateway
Instance calculator. This list prints one unit; the other units follow a formula. Gree GMS GW BACnet converter instance calculator →
Reference only, provided as-is: verify against Gree’s current documentation and the live device before use. Not official Gree information. Terms of use.
BMS integration notes: Gree GMS BACnet Converter (GMS GW) - R series
Address each split unit from its wired controller, pick BACnet/IP or MS/TP, set a unique device instance from the LCD menu, then map each unit's object block using the instance formula. On/off, mode, fan and setpoint are writable value objects; room temperature and failure status are read-only.
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 |
|---|---|---|---|
| BV 256 | ON/OFF | Start/stop the split unit | Write |
| MV 257 | Operation Mode | Cool/heat/auto/dry/fan | Write |
| AV 256 | SetPoint Temperature | Room temperature setpoint, °C/°F | Write |
| MV 256 | Fan Speed | Low / medium / high / auto (plus extra speeds) | Write |
| AI 256 | Room Temperature | Room temperature, °C/°F | Read |
| BI 256 | split unit Failure Status | Failure flag; Active_Text carries the code | Read |
Enable & remote start
No enable point; a unit is controllable once it has a unique remote control address on line L1 or L2. BV 'Global Lock' and the two Lock BVs stop local wired-controller changes.
Network setup
- Device instance is set from the gateway's LCD menu (Menu > BACnet > Instance number) and takes effect after a restart.
- The BAC A/B RS-485 port runs either BACnet MS/TP or Modbus RTU; choose BACnet in the 'Line 3' setting of the USB configuration tool.
- BACnet/IP runs on the Ethernet port; network settings are changed with the ifconfig command in the gateway terminal.
- Set each indoor unit's remote control address (0-63) on its wired controller before mapping objects.
Watch out for
- Instances are computed from line and remote control address, so re-addressing a unit moves all of its objects.
- Operation Mode state 4 is not used (0 Cool, 1 Heat, 2 Auto, 3 Dry, 5 Fan).
- Louver only supports Auto swing (5) and Off (6).
- Class 1 (series-specific) objects differ between R-series and DWUNI units; confirm the unit series before mapping.
Gree GMS BACnet Converter (GMS GW) - R series 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.
| Description | States | |||||
|---|---|---|---|---|---|---|
| BImin | 256 | split unit Failure Status | Unit failure; Active_Text holds the failure code | Read | 0=No Failure, 1=Failure | |
| BVmin | 256 | ON/OFF | Unit on/off | Write | 0=Off, 1=On | |
| BV | 258 | Lock (prohibit) ON/OFF change from Wired Controller | Lock on/off at the wired controller | Write | ||
| BV | 259 | Lock (prohibit) Operation Mode change from Wired Controller | Lock mode change at the wired controller | Write | ||
| BV | 261 | Global Lock | Lock all wired-controller changes | Write | ||
| AImin | 256 | Room Temperature | Room temperature | °C/°F | Read | |
| AVmin | 256 | SetPoint Temperature | Temperature setpoint | °C/°F | Write | |
| MVmin | 256 | Fan Speed | Fan speed | Write | 0=Low, 1=Medium, 2=High, 3=Auto, 4=Top, 5=Very Low, 6=Super High | |
| MVmin | 257 | Operation Mode | Operating mode | Write | 0=Cool, 1=Heat, 2=Auto, 3=Dry, 5=Fan | |
| MV | 258 | Louver Position (swing) | Louver swing | Write | 5=Auto (swing), 6=OFF (stop) | |
| BI | 1048845 | Defrosting | Defrost active | Read | ||
| BI | 1048846 | ODU Fan State | Outdoor fan state | Read | ||
| BI | 1048847 | 4-Way Valve | Reversing valve state | Read | ||
| BI | 1048848 | Compressor Status | Compressor running | Read | ||
| BV | 1048839 | Health Function | Health function on/off | Write | ||
| BV | 1048840 | I-Demand Function | I-Demand function on/off | Write | ||
| BV | 1048841 | Dry Function | Dry function on/off | Write | ||
| BV | 1048842 | Quiet Mode | Quiet mode on/off | Write | ||
| BV | 1048843 | Memory Function | Memory function on/off | Write | ||
| BV | 1048844 | Wired Controller Temperature Presentation | Wired controller display units | Write | 0=Celsius, 1=Fahrenheit | |
| BV | 1048849 | Absence Function | Absence function on/off | Write | ||
| BV | 1048850 | Low Temperature Dry Function | Low temperature dry on/off | Write | ||
| BV | 1048851 | Fresh Air Function | Fresh air function on/off | Write | ||
| BV | 1048852 | Cooling Set Point Limit Enable | Enable cooling setpoint limit | Write | ||
| BV | 1048853 | Heating Set Point Limit Enable | Enable heating setpoint limit | Write | ||
| AV | 1048837 | Cooling Set Point Limit | Cooling setpoint limit | °C/°F | Write | |
| AV | 1048838 | Heating Set Point Limit | Heating setpoint limit | °C/°F | Write | |
| PIV | 1048832 | IDU Type Code | Indoor unit type code | Read | ||
| PIV | 1048833 | Sleep Function | Sleep function | Read | ||
| PIV | 1048834 | Modbus Address | Unit Modbus address | Read | ||
| PIV | 1048835 | Outdoor Temperature °C | Outdoor temperature | °C | Read | |
| PIV | 1048836 | Evaporation Temperature °C | Evaporator temperature | °C | Read |
No points match these filters.
Object ID lookup: Gree GMS Gateway, R Series point IDs by name
BI256split unit Failure StatusBV256ON/OFFBV258Lock (prohibit) ON/OFF change from Wired ControllerBV259Lock (prohibit) Operation Mode change from Wired ControllerBV261Global LockAI256Room TemperatureAV256SetPoint TemperatureMV256Fan SpeedMV257Operation ModeMV258Louver Position (swing)BI1048845DefrostingBI1048846ODU Fan StateBI10488474-Way ValveBI1048848Compressor StatusBV1048839Health FunctionBV1048840I-Demand FunctionBV1048841Dry FunctionBV1048842Quiet ModeBV1048843Memory FunctionBV1048844Wired Controller Temperature PresentationBV1048849Absence FunctionBV1048850Low Temperature Dry FunctionBV1048851Fresh Air FunctionBV1048852Cooling Set Point Limit EnableBV1048853Heating Set Point Limit EnableAV1048837Cooling Set Point LimitAV1048838Heating Set Point LimitPIV1048832IDU Type CodePIV1048833Sleep FunctionPIV1048834Modbus AddressPIV1048835Outdoor Temperature °CPIV1048836Evaporation Temperature °C
Integration notes
- Instance formula: Class x 1048576 + (Line - 1) x 131072 + remote control address x 256 + object number. Common objects are Class 0, series-specific objects Class 1. This file lists line 1, address 1 (L1.001).
- Each split unit needs a unique remote control address (0-63 per line), set from its wired controller; the gateway shows it as L<line>.<address>.
- The manual has no read/write column; access was inferred from object type (BV/AV/MV writable, BI/AI/PIV read-only).
- The gateway is made by CoolAutomation for Gree; GMS GW 1 handles one unit, GMS GW 12 up to 12 units over two RS-485 lines.
- M, W, P and X series units on a DWUNI wired controller use a different Class 1 object set (see the separate GMS GW DWUNI entry).
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 GMS BACnet Converter (GMS GW) - R series 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 Gree GMS BACnet Converter (GMS GW) - R series
How many BACnet points does the Gree GMS BACnet Converter (GMS GW) - R series have?
This list has 32 BACnet objects: 1 analog input, 3 analog values, 5 binary inputs, 15 binary values, 3 multi-state values, 5 positive integer values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Gree GMS BACnet Converter (GMS GW) - R series BACnet points are writable?
21 of the 32 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 Gree GMS BACnet Converter (GMS GW) - R series BACnet documentation?
The source is Gree Mini Split (GMS) BACnet Converter User Manual (1.1), revision 2023-12-11 (Version 1.1), published free by Gree at https://www.greecomfort.com/assets/our-products/mini-split-controls/documents/cool-automation-mini-split-controls-user-manual.pdf.
What are the minimum BACnet points to integrate the Gree GMS BACnet Converter (GMS GW) - R series?
Start with BV 256 ON/OFF (Start/stop the split unit); MV 257 Operation Mode (Cool/heat/auto/dry/fan); AV 256 SetPoint Temperature (Room temperature setpoint, °C/°F); MV 256 Fan Speed (Low / medium / high / auto (plus extra speeds)); AI 256 Room Temperature (Room temperature, °C/°F); BI 256 split unit Failure Status (Failure flag; Active_Text carries the code).
How do I enable BMS control of the Gree GMS BACnet Converter (GMS GW) - R series?
No enable point; a unit is controllable once it has a unique remote control address on line L1 or L2. BV 'Global Lock' and the two Lock BVs stop local wired-controller changes.
How do I check these points on the real GMS BACnet Converter (GMS GW) - R series?
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 Gree BACnet points lists
Source: Gree Mini Split (GMS) BACnet Converter User Manual · 1.1 · rev. 2023-12-11 (Version 1.1). Object names, instances and units are reproduced as published; descriptions are our own.