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VRF indoor unit gateway (BACnet IP) · BACnet points list
Midea IMMP-BAC(A) BACnet gateway - indoor unit device BACnet points list
Updated 7 November 2026
The IMMP-BAC(A) (K05.2-BACNET(A)) is a Midea building control gateway that publishes every connected VRF indoor unit, outdoor unit and HTHM hydronic module as its own BACnet IP device. This is the object set of one indoor unit device: on/off, mode, fan speed, setpoints and lock commands plus room, coil and discharge temperatures and the error code.
This page lists 23 BACnet objects for the Midea IMMP-BAC(A) BACnet gateway - indoor unit device — 13 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
- IMMP-BAC(A) BACnet gateway - indoor unit device
- Equipment
- VRF indoor unit gateway (BACnet IP)
- Equipment type
- VRF & split air conditioners
- BACnet objects
- 23 (13 writable)
- Transport
- BACnet IP
- Firmware
- Not stated
- Also known as
- IMMP-BAC(A), K05.2-BACNET(A), IMMP-BAC-A
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 IMMP-BAC(A) BACnet gateway - indoor unit device
Give the gateway an IP address and a BACnet network number, then discover one BACnet device per indoor unit. Map BV 1 on/off, MV 1 mode, MV 2 fan speed and AV 1 setpoint, and read AI 1 room temperature, BI 2 alarm and AI 7 error code.
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 1 | Configuración de encendido/apagado | On/off command and status | Write |
| MV 1 | Configuración del modo de funcionamiento | Mode: 1=Off 2=Fan 3=Cool 4=Heat 5=Auto 6=Dry | Write |
| MV 2 | Ajuste de la velocidad del ventilador | Fan speed 1-7, 8=Auto | Write |
| AV 1 | Ajuste de temperatura | Setpoint, 10-30 °C | Write |
| AI 1 | Temperatura ambiente | Room temperature, °C | Read |
| BI 2 | Indicación de alarma | Unit alarm | Read |
| AI 7 | Código de avería | Error code (1-260 = A0...UU) | Read |
Network setup
- Default gateway IP address is 192.168.1.8; change it on the gateway web page, then set a BACnet network number between 2 and 254 (unique per gateway) and restart the gateway for it to take effect.
- Unit device instances follow the network/port/address formula in the notes.
Watch out for
- Space commands at least 200 ms apart or the gateway can drop them.
- When BV 1 turns a unit on it resumes its last mode, fan and setpoint; a unit seen off at first connection defaults to cooling 24 °C, fan speed 1.
- In AUTO mode AV 2 must be at or above AV 3; the gateway raises AV 2 to match if not.
- On 3-speed fans, MV 2 values 1-2 = low, 3-4 = medium, 5-7 = high.
Midea IMMP-BAC(A) BACnet gateway - 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 | |||||
|---|---|---|---|---|---|---|
| AImin | 1 | Temperatura ambiente | Room temperature | °C | Read | |
| AImin | 7 | Código de avería | Error code (see code table) | Read | ||
| AI | 8 | Temperatura del aire de salida | Discharge air temperature | °C | Read | |
| AI | 9 | Apertura de EXV | EXV opening | Read | ||
| AI | 10 | Versión del software | Software version | Read | ||
| AI | 11 | Tipo de unidad interior | Indoor unit type code | Read | 0=4-VÍAS, 1=4-VÍAS, 2=Montaje en pared, 3=Conducto-M, 4=Conducto-L, 5=AHU, 6=Conducto-H, 7=COMPACTA, 8=Techo y suelo, 9=Columna, 10=Columna, 11=Unidad de procesamiento de aire fresco, 12=Split Inverter, 13=HRV, 14=Cassette de 1 vía, 15=Cassette de 2 vía, 16=Consola, 17=HTHM, 18=Unidad de procesamiento de aire fresco, 20=Unidad de procesamiento de aire fresco, 21=AHUKIT (aire de retorno), 22=Columna, 24=AHUKIT (aire de descarga) | |
| AI | 12 | Potencia de unidad interior | Indoor unit capacity | Read | ||
| AI | 13 | T2A | T2A coil temperature | °C | Read | |
| AI | 14 | T2B | T2B coil temperature | °C | Read | |
| BImin | 2 | Indicación de alarma | Alarm indication | Read | 0=Sin error, 1=Error | |
| BVmin | 1 | Configuración de encendido/apagado | On/off command and status | Write | 0=APAGADO, 1=ENCENDIDO | |
| BV | 4 | Bloqueo del control remoto | Lock infrared remote | Write | 0=Desbloquear, 1=Bloquear | |
| BV | 5 | Ajuste del bloqueo del mando por cable | Lock wired controller | Write | 0=Desbloquear, 1=Bloquear | |
| MVmin | 1 | Configuración del modo de funcionamiento | Operating mode command and status | Write | 1=APAGADO, 2=Ventilador, 3=Refrigeración, 4=Calefacción, 5=AUTO, 6=Aire seco | |
| MVmin | 2 | Ajuste de la velocidad del ventilador | Fan speed command and status | Write | 1-7=Velocidad 1-7, 8=AUTO, 9=Ventilador apagado (solo estado) | |
| MV | 3 | Configuración del límite del modo de funcionamiento | Mode lock | Write | 1=Desbloqueado, 2=Refrigeración bloqueada, 3=Calefacción bloqueada | |
| MV | 5 | Ajuste de bloqueo/ desbloqueo del ventilador | Fan speed lock | Write | 1-7=Bloquear velocidad 1-7, 8=Desbloquear | |
| AVmin | 1 | Ajuste de temperatura | Temperature setpoint, 10-30 °C | °C | Write | |
| AV | 2 | Configuración del punto de referencia doble (refrigeración) | Dual setpoint, cooling (auto mode) | °C | Write | |
| AV | 3 | Configuración del punto de referencia doble (calefacción) | Dual setpoint, heating (auto mode) | °C | Write | |
| AV | 4 | Configuración del límite de temperatura de refrigeración | Cooling setpoint lower limit (0 = unlocked) | °C | Write | |
| AV | 5 | Configuración del límite de temperatura de calefacción | Heating setpoint upper limit (0 = unlocked) | °C | Write | |
| AV | 6 | Ajuste de la oscilación | Louver swing setting | Write | 0=Mantener ángulo, 1-5=Ángulo 1-5, 6=Oscilación auto desactivada, 7=Oscilación auto activada |
No points match these filters.
Object ID lookup: Midea IMMP-BAC point IDs by name
AI1Temperatura ambienteAI7Código de averíaAI8Temperatura del aire de salidaAI9Apertura de EXVAI10Versión del softwareAI11Tipo de unidad interiorAI12Potencia de unidad interiorAI13T2AAI14T2BBI2Indicación de alarmaBV1Configuración de encendido/apagadoBV4Bloqueo del control remotoBV5Ajuste del bloqueo del mando por cableMV1Configuración del modo de funcionamientoMV2Ajuste de la velocidad del ventiladorMV3Configuración del límite del modo de funcionamientoMV5Ajuste de bloqueo/ desbloqueo del ventiladorAV1Ajuste de temperaturaAV2Configuración del punto de referencia doble (refrigeración)AV3Configuración del punto de referencia doble (calefacción)AV4Configuración del límite de temperatura de refrigeraciónAV5Configuración del límite de temperatura de calefacciónAV6Ajuste de la oscilación
Integration notes
- The manual is in Spanish (Midea Spain); object names are kept as printed and the English descriptions are ours.
- Each unit is its own BACnet device. Indoor unit device instance = BACnet network number x 10000 + RS-485 port (0-3) x 1000 + indoor address (0-63); outdoor unit = network x 10000 + port x 1000 + 100 + outdoor address (0-31).
- Some models do not support every object (for example cooling-only systems have no heat or auto mode).
- Error codes are numbered 1-260 and map to the display codes A0...UU (blocks of 20 per letter).
- The doc marks objects L (read) or L/E (read and write the unit state); there is no priority-array information.
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 IMMP-BAC(A) BACnet gateway - 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 IMMP-BAC(A) BACnet gateway - indoor unit device
How many BACnet points does the Midea IMMP-BAC(A) BACnet gateway - indoor unit device have?
This list has 23 BACnet objects: 9 analog inputs, 6 analog values, 1 binary input, 3 binary values, 4 multi-state values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Midea IMMP-BAC(A) BACnet gateway - indoor unit device BACnet points are writable?
13 of the 23 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 IMMP-BAC(A) BACnet gateway - indoor unit device BACnet documentation?
The source is Manual de Instalación y de Usuario, Sistema de control IMMP-BAC(A) (K05.2-BACNET(A)) (210427_MI-MU_F-CTR_IMMP-BAC-A-ES), revision 2021-04, published free by Midea at https://www.midea.es/wp-content/uploads/2021/04/210427_MI-MU_F-CTR_IMMP-BAC-A-ES.pdf.
What are the minimum BACnet points to integrate the Midea IMMP-BAC(A) BACnet gateway - indoor unit device?
Start with BV 1 Configuración de encendido/apagado (On/off command and status); MV 1 Configuración del modo de funcionamiento (Mode: 1=Off 2=Fan 3=Cool 4=Heat 5=Auto 6=Dry); MV 2 Ajuste de la velocidad del ventilador (Fan speed 1-7, 8=Auto); AV 1 Ajuste de temperatura (Setpoint, 10-30 °C); AI 1 Temperatura ambiente (Room temperature, °C); BI 2 Indicación de alarma (Unit alarm); AI 7 Código de avería (Error code (1-260 = A0...UU)).
How do I check these points on the real IMMP-BAC(A) BACnet gateway - 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 indoor unit device)
Midea GW3-BAC gateway - V8 VRF indoor unit device
Midea V8 series VRF indoor units connected through the GW3-BAC gateway.
Also known as: GW3-BAC, Midea GW3-BAC IDU, Midea V8 BACnet gateway, Midea VRF V8 BACnet IP, Pasarela GW3-BAC - 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 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 de Usuario, Sistema de control IMMP-BAC(A) (K05.2-BACNET(A)) · 210427_MI-MU_F-CTR_IMMP-BAC-A-ES · rev. 2021-04. Object names, instances and units are reproduced as published; descriptions are our own.