Easy BACnet- Home
- BACnet points lists
- Midea
- GW3-BAC gateway - V8 VRF indoor unit device
VRF BACnet gateway (V8 indoor unit device) · BACnet points list
Midea GW3-BAC gateway - V8 VRF indoor unit device BACnet points list
Updated 11 November 2026
The Midea GW3-BAC gateway serves V8 VRF systems on BACnet IP and creates one virtual BACnet device per indoor unit. Each indoor-unit device has 46 objects: on/off and fault status, mode, fan speed, setpoints (single and auto dual), room temperature, error code, swing, setpoint limits, locks, coil temperatures and EXV opening, plus AO/BO commands for mode, setpoints, fan, swing, limits and locks.
This page lists 46 BACnet objects for the Midea GW3-BAC gateway - V8 VRF indoor unit device — 17 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Midea’s own free documentation, linked below.
- Manufacturer
- Midea
- Model
- GW3-BAC gateway - V8 VRF indoor unit device
- Equipment
- VRF BACnet gateway (V8 indoor unit device)
- Equipment type
- VRF & split air conditioners
- BACnet objects
- 46 (17 writable)
- Transport
- BACnet IP
- Firmware
- Not stated
- Also known as
- GW3-BAC, Midea GW3-BAC IDU, Midea V8 BACnet gateway, Midea VRF V8 BACnet IP, Pasarela GW3-BAC
Reference only, provided as-is: verify against Midea’s current documentation and the live device before use. Not official Midea information. Terms of use.
BMS integration notes: Midea GW3-BAC gateway - V8 VRF indoor unit device
Wire the V8 outdoor units' X/Y/E terminals to one of the gateway's RS-485 ports, set the BACnet setting on the gateway web page, then discover one BACnet IP device per indoor unit and use AO 1 for on/off and mode, AO 2 for the setpoint and AO 5 for fan speed.
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 1 | Ajuste del modo | On (239), off (240), auto (241) or mode | Write |
| AO 2 | Ajuste del punto de consigna | Setpoint command | Write |
| AO 5 | Ajuste del ventilador | Fan speed 1-7, 241 = auto | Write |
| BI 1 | Estado de encendido/apagado | Run status | Read |
| AI 1 | Modo | Operating mode (read with BI 3 auto flag) | Read |
| AI 3 | Punto de consigna | Setpoint in use | Read |
| AI 6 | Temperatura ambiente | Indoor room temperature | Read |
| BI 2 | Indicación de alarma | Unit fault | Read |
| AI 7 | Código de avería | Encoded error code | Read |
Enable & remote start
No enable point; AO 1 Ajuste del modo turns the unit on (239) or off (240).
Network setup
- Gateway default IP 192.168.1.8; configure it on the gateway web page (PC on the same subnet).
- BACnet UDP port default 47808 (1-65534).
- Three isolated RS-485 ports (X0Y0E, X1Y1E, X2Y2E), each for up to 8 V8 refrigerant systems; 64 indoor units max.
Watch out for
- Send commands no faster than every 500 ms; the internal command queue can fill and drop commands.
- In auto mode the unit uses AO 3/AO 4 (cool/heat setpoints); in other modes AO 2.
- Writing a mode or value the indoor unit does not support gives unpredictable results.
Midea GW3-BAC gateway - V8 VRF indoor unit device 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 | |||||
|---|---|---|---|---|---|---|
| BImin | 1 | Estado de encendido/apagado | On/off status | Read | 0=Apagado, 1=Encendido | |
| BImin | 2 | Indicación de alarma | Fault indication | Read | 0=Sin errores, 1=Error | |
| BI | 3 | AutoMode | Auto mode active | Read | 0=AutoMode no, 1=AutoMode | |
| AImin | 1 | Modo | Operating mode (combine with BI 3) | Read | 0=Apagado, 1=Ventilador, 2=Refrigeración, 3=Calefacción, 6=Secado | |
| BI | 4 | AutoFan | Auto fan active | Read | 0=AutoFan no, 1=AutoFan | |
| AI | 2 | FanGear | Fan speed level (combine with BI 4) | Read | 1=Velocidad del ventilador 1 (velocidad baja), 2=Velocidad del ventilador 2 (velocidad baja), 3=Velocidad del ventilador 3 (velocidad media), 4=Velocidad del ventilador 4 (velocidad media), 5=Velocidad del ventilador 5 (velocidad alta), 6=Velocidad del ventilador 6 (velocidad alta), 7=Velocidad del ventilador 7 (velocidad alta) | |
| AImin | 3 | Punto de consigna | Setpoint in use | Read | ||
| AI | 4 | Punto de consigna de frío | Cooling setpoint in auto mode | Read | ||
| AI | 5 | Punto de consigna de calor | Heating setpoint in auto mode | Read | ||
| AImin | 6 | Temperatura ambiente | Indoor room temperature | Read | ||
| AImin | 7 | Código de avería | Indoor unit error code (encoded) | Read | 0=no error; 1-260 = A0..UU code table, high byte = segment/component (see manual) | |
| AI | 8 | LRSwing | Left/right swing status | Read | 0=Sin oscilación izquierda/derecha, 1=Ángulo 1, 2=Ángulo 2, 3=Ángulo 3, 4=Ángulo 4, 5=Ángulo 5, 14=Oscilación automática | |
| AI | 9 | UDSwing | Up/down swing status | Read | 0=Sin oscilación arriba/abajo, 1=Ángulo 1, 2=Ángulo 2, 3=Ángulo 3, 4=Ángulo 4, 5=Ángulo 5, 14=Oscilación automática | |
| AI | 10 | LimitMaxHeatStp | Heating setpoint upper limit | Read | ||
| AI | 11 | LimitMinHeatStp | Heating setpoint lower limit | Read | ||
| AI | 12 | LimitMaxCoolStp | Cooling setpoint upper limit | Read | ||
| AI | 13 | LimitMinCoolStp | Cooling setpoint lower limit | Read | ||
| AI | 14 | LimitMode | Mode lock status | Read | 0/255=Desbloqueada, 1=Modo Ventilador bloqueado, 2=Modo Frío bloqueado, 3=Modo Calor bloqueado, 6=Modo Seco bloqueado, 241=Modo Automático bloqueado | |
| AI | 15 | LimitOnOff | On/off lock status | Read | 0=Desbloqueada, 1=Encendido bloqueado, 2=Apagado bloqueado | |
| AI | 16 | LimitFan | Fan speed lock status | Read | 0=Desbloqueada, 1=Velocidad del ventilador 1 (velocidad baja), 2=Velocidad del ventilador 2 (velocidad baja), 3=Velocidad del ventilador 3 (velocidad media), 4=Velocidad del ventilador 4 (velocidad media), 5=Velocidad del ventilador 5 (velocidad alta), 6=Velocidad del ventilador 6 (velocidad alta), 7=Velocidad del ventilador 7 (velocidad alta) | |
| AI | 17 | LimitUDSwing | Up/down swing lock status | Read | 0=Desbloqueada, 1=Ángulo 1 bloqueado, 2=Ángulo 2 bloqueado, 3=Ángulo 3 bloqueado, 4=Ángulo 4 bloqueado, 5=Ángulo 5 bloqueado, 14=Oscilación automática bloqueada | |
| BI | 5 | LockRC | Remote controller lock status | Read | 0=Desbloquear, 1=Bloquear | |
| BI | 6 | LockWDC | Wired controller lock status | Read | 0=Desbloquear, 1=Bloquear | |
| AI | 18 | EXV | Electronic expansion valve opening | Read | ||
| AI | 19 | T2A | T2A coil temperature | Read | ||
| AI | 20 | T2B | T2B coil temperature | Read | ||
| AI | 21 | Modelo_IDU | Indoor unit model type | Read | 0=IDU antigua, 1=Casete de 4 vías (4-WAY), 2=Montaje en pared, 3=Conducto de presión estática media (M-Duct), 4=Conducto de presión estática baja (L-Duct), 5=Unidad de tratamiento de aire (AHU), 6=Conducto de presión estática alta (H-DUCT), 7=Casete compacto de 4 vías (COMPACT), 8=Techo y suelo, 9=De pie, 10=De pie, 11=Unidad de procesamiento de aire fresco, 12=Split CA con inversor, 13=HRV, 14=Casete de 1 vía, 15=Casete de 2 vías, 16=Consola, 17=HTHM, 18=Unidad de procesamiento de aire fresco, 20=Unidad de procesamiento de aire fresco, 21=AHUKIT (control del aire de retorno), 22=De pie, 24=AHUKIT (control del aire de descarga) | |
| AI | 22 | CV | Capacity (HP) | Read | ||
| AI | 23 | FanGearType | Fan speed type (3 or 7 speeds) | Read | 0=Velocidad del ventilador 3, 1=Velocidad del ventilador 7 | |
| AOmin | 1 | Ajuste del modo | Mode / on-off command | Write | 239=Encendido, 240=Apagado, 241=Automático, 1=Ventilador, 2=Refrigeración, 3=Calefacción, 5=Fresco, 6=Secado | |
| AOmin | 2 | Ajuste del punto de consigna | Setpoint command | Write | ||
| AO | 3 | Ajuste del punto de consigna de frío | Cooling setpoint command, auto mode | Write | ||
| AO | 4 | Ajuste del punto de consigna de calor | Heating setpoint command, auto mode | Write | ||
| AOmin | 5 | Ajuste del ventilador | Fan speed command | Write | 1=Velocidad del ventilador 1, 2=Velocidad del ventilador 2, 3=Velocidad del ventilador 3, 4=Velocidad del ventilador 4, 5=Velocidad del ventilador 5, 6=Velocidad del ventilador 6, 7=Velocidad del ventilador 7, 241=Automática | |
| AO | 6 | Ajuste de LRSwing | Left/right swing command | Write | 1=Ángulo 1, 2=Ángulo 2, 3=Ángulo 3, 4=Ángulo 4, 5=Ángulo 5, 14=Automática | |
| AO | 7 | Ajuste de UDSwing | Up/down swing command | Write | 1=Ángulo 1, 2=Ángulo 2, 3=Ángulo 3, 4=Ángulo 4, 5=Ángulo 5, 14=Automática | |
| AO | 8 | SetLimitMaxHeatStp | Set heating setpoint upper limit | Write | ||
| AO | 9 | SetLimitMinHeatStp | Set heating setpoint lower limit | Write | ||
| AO | 10 | SetLimitMaxCoolStp | Set cooling setpoint upper limit | Write | ||
| AO | 11 | SetLimitMinCoolStp | Set cooling setpoint lower limit | Write | ||
| AO | 12 | SetLimitMode | Set mode lock | Write | 0=Desbloquear, 1=Modo Ventilador bloqueado, 2=Modo Frío bloqueado, 3=Modo Calor bloqueado, 6=Modo Seco bloqueado, 241=Modo Automático bloqueado | |
| AO | 13 | SetLimitOnOff | Set on/off lock | Write | 0=Desbloqueado, 1=Encendido bloqueado, 2=Apagado bloqueado | |
| AO | 14 | SetLimitFan | Set fan speed lock | Write | 0=Desbloqueada, 1=Velocidad del ventilador 1 (baja velocidad) bloqueada, 2=Velocidad del ventilador 2 (baja velocidad) bloqueada, 3=Velocidad del ventilador 3 (velocidad media) bloqueada, 4=Velocidad del ventilador 4 (velocidad media) bloqueada, 5=Velocidad del ventilador 5 (alta velocidad) bloqueada, 6=Velocidad del ventilador 6 (alta velocidad) bloqueada, 7=Velocidad del ventilador 7 (alta velocidad) bloqueada | |
| AO | 15 | SetLimtUDSwing | Set up/down swing lock | Write | 0=Desbloqueada, 1=Ángulo 1 bloqueado, 2=Ángulo 2 bloqueado, 3=Ángulo 3 bloqueado, 4=Ángulo 4 bloqueado, 5=Ángulo 5 bloqueado, 14=Oscilación automática bloqueada | |
| BO | 1 | SetLockRC | Set remote controller lock | Write | 0=Desbloquear, 1=Bloquear | |
| BO | 2 | SetLockWDC | Set wired controller lock | Write | 0=Desbloquear, 1=Bloquear |
No points match these filters.
Object ID lookup: Midea GW3-BAC V8 VRF Indoor Unit point IDs by name
BI1Estado de encendido/apagadoBI2Indicación de alarmaBI3AutoModeAI1ModoBI4AutoFanAI2FanGearAI3Punto de consignaAI4Punto de consigna de fríoAI5Punto de consigna de calorAI6Temperatura ambienteAI7Código de averíaAI8LRSwingAI9UDSwingAI10LimitMaxHeatStpAI11LimitMinHeatStpAI12LimitMaxCoolStpAI13LimitMinCoolStpAI14LimitModeAI15LimitOnOffAI16LimitFanAI17LimitUDSwingBI5LockRCBI6LockWDCAI18EXVAI19T2AAI20T2BAI21Modelo_IDUAI22CVAI23FanGearTypeAO1Ajuste del modoAO2Ajuste del punto de consignaAO3Ajuste del punto de consigna de fríoAO4Ajuste del punto de consigna de calorAO5Ajuste del ventiladorAO6Ajuste de LRSwingAO7Ajuste de UDSwingAO8SetLimitMaxHeatStpAO9SetLimitMinHeatStpAO10SetLimitMaxCoolStpAO11SetLimitMinCoolStpAO12SetLimitModeAO13SetLimitOnOffAO14SetLimitFanAO15SetLimtUDSwingBO1SetLockRCBO2SetLockWDC
Integration notes
- The manual is in Spanish; object names and state texts are kept as printed. The device may report different (for example English) names.
- Every VRF unit is its own virtual BACnet device. Device ID = ABCDEFG: ABC = gateway BACnet setting (2-400), D = RS-485 port (0-2), E = refrigerant system (0-7), FG = unit address (indoor 0-63, outdoor 96-99). Example: 192405 = setting 19, port 2, system 4, indoor unit 05.
- No units are given in the manual.
- The manual describes inputs as read-only and outputs as write-only; no priority array is documented.
- AO 1 Ajuste del modo also turns the unit on (239) or off (240). AO 15 is printed as SetLimtUDSwing on its detail page (SetLimitUDSwing in the object list).
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 GW3-BAC gateway - V8 VRF indoor unit device 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 Midea GW3-BAC gateway - V8 VRF indoor unit device
How many BACnet points does the Midea GW3-BAC gateway - V8 VRF indoor unit device have?
This list has 46 BACnet objects: 23 analog inputs, 15 analog outputs, 6 binary inputs, 2 binary outputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Midea GW3-BAC gateway - V8 VRF indoor unit device BACnet points are writable?
17 of the 46 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 Midea GW3-BAC gateway - V8 VRF indoor unit device BACnet documentation?
The source is Manual de instalación y del usuario - Pasarela GW3-BAC (Spanish), revision 2024-04 (240417), published free by Midea at https://www.midea.es/wp-content/uploads/2024/04/240417_MI-MU_M_CTR_GW3-BAC-ES.pdf.
What are the minimum BACnet points to integrate the Midea GW3-BAC gateway - V8 VRF indoor unit device?
Start with AO 1 Ajuste del modo (On (239), off (240), auto (241) or mode); AO 2 Ajuste del punto de consigna (Setpoint command); AO 5 Ajuste del ventilador (Fan speed 1-7, 241 = auto); BI 1 Estado de encendido/apagado (Run status); AI 1 Modo (Operating mode (read with BI 3 auto flag)); AI 3 Punto de consigna (Setpoint in use); AI 6 Temperatura ambiente (Indoor room temperature); BI 2 Indicación de alarma (Unit fault); AI 7 Código de avería (Encoded error code).
How do I enable BMS control of the Midea GW3-BAC gateway - V8 VRF indoor unit device?
No enable point; AO 1 Ajuste del modo turns the unit on (239) or off (240).
How do I check these points on the real GW3-BAC gateway - V8 VRF indoor unit device?
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 Midea BACnet points lists
- VRF BACnet gateway (V8 outdoor unit device)
Midea GW3-BAC gateway - V8 VRF outdoor unit device
Midea V8 series VRF outdoor units connected through the GW3-BAC gateway.
Also known as: GW3-BAC, Midea GW3-BAC ODU, Midea V8 outdoor unit BACnet, Midea VRF V8 BACnet IP - VRF hydronic module (air to water heat pump) gateway (BACnet IP)
Midea IMMP-BAC(A) BACnet gateway - HTHM hydronic module device
Midea high-temperature hydronic modules (HTHM) on an MDV VRF system, connected through the IMMP-BAC(A) gateway.
Also known as: IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A - VRF indoor unit gateway (BACnet IP)
Midea IMMP-BAC(A) BACnet gateway - indoor unit device
Midea MDV VRF and commercial indoor units connected through the IMMP-BAC(A) building control gateway.
Also known as: IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A - VRF outdoor unit gateway (BACnet IP)
Midea IMMP-BAC(A) BACnet gateway - outdoor unit device
Midea MDV VRF outdoor units connected through the IMMP-BAC(A) building control gateway.
Also known as: IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A
Source: Manual de instalación y del usuario - Pasarela GW3-BAC (Spanish) · rev. 2024-04 (240417). Object names, instances and units are reproduced as published; descriptions are our own.