Easy BACnet- Home
- BACnet points lists
- Mitsubishi Electric
- Procon MelcoBEMS MINI (A1M+) - Air-To-Air units
Split / VRF indoor unit interface (single unit) · BACnet points list
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units BACnet points list
Updated 11 November 2026
The MelcoBEMS MINI (A1M+) plugs into the CN105 connector of one Mitsubishi Electric indoor unit and serves it on BACnet MS/TP (RS-485) or BACnet IP. For air-to-air units it gives on/off, mode, setpoint, fan speed and vane commands with matching status objects, room temperature, the fault code, and an option to feed a BMS room temperature to the unit.
This page lists 14 BACnet objects for the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units — 8 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Mitsubishi Electric’s own free documentation, linked below.
- Manufacturer
- Mitsubishi Electric
- Model
- Procon MelcoBEMS MINI (A1M+) - Air-To-Air units
- Equipment
- Split / VRF indoor unit interface (single unit)
- Equipment type
- VRF & split air conditioners
- BACnet objects
- 14 (8 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- 4.1.1
- Also known as
- A1M+, MelcoBEMS MINI A1M PLUS, MelcoBEMS MINI (A1M), Procon A1M
Reference only, provided as-is: verify against Mitsubishi Electric’s current documentation and the live device before use. Not official Mitsubishi Electric information. Terms of use.
BMS integration notes: Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units
Set DIP switch 7 to BACnet, give the adapter a node address or IP, then write on/off, mode, setpoint and fan speed and read the matching state objects, room temperature and fault 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 |
|---|---|---|---|
| BO 0 | Drive OFF/ON Setup | Unit on/off command | Command |
| MO 3 | Mode Setup | Mode command (heat/dry/cool/fan/auto) | Command |
| AV 2 | Setpoint | Temperature setpoint | Command |
| MO 5 | Fan Speed Setup | Fan speed command | Command |
| BI 1 | Drive OFF/ON State | On/off status | Read |
| MI 4 | Mode State | Current mode | Read |
| AI 10 | Inlet Temperature | Room (inlet) temperature | Read |
| AI 11 | Fault Code | 4-digit fault code, 8000 = no error | Read |
Enable & remote start
No separate enable; the Setup objects command the indoor unit directly.
Sensors & values from the BMS
Set External Temperature ON/OFF Setup (BO 12) to ON and write External Temperature Input (AV 13); the unit then uses that value instead of its own temperature.
Network setup
- DIP switch 7 OFF selects BACnet (MS/TP and BACnet IP); ON selects Modbus RTU.
- DIP switches 1-5 set the RS-485 node address 1-30 (all OFF = 1, all ON = set in software); it is the MS/TP station ID.
- DIP switch 6 ON fixes RS-485 at 9600 baud, no parity; OFF uses the software baud rate (MS/TP up to 76800).
- Default IP address 192.168.92.114; network settings are changed on the adapter's web page.
- Device instance, Max Master and Max Info Frames are set through Modbus holding registers 272-275.
Watch out for
- Fan speed and vane positions available depend on the indoor unit model.
- If one adapter serves a twin/triple/quad system, the fault code object should not be relied on; the guide recommends one adapter per indoor unit.
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units 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 | |||||
|---|---|---|---|---|---|---|
| BOmin | 0 | Drive OFF/ON Setup | Command | 0=Drive OFF, 1=Drive ON | ||
| BImin | 1 | Drive OFF/ON State | Read | 0=Drive OFF, 1=Drive ON | ||
| AVmin | 2 | Setpoint | °C/°F | Command | ||
| MOmin | 3 | Mode Setup | Command | 1=Heating, 2=Humidity reduction, 3=Cooling, 4=Ventilation, clean air operation, 5=Auto Operation | ||
| MImin | 4 | Mode State | Read | 1=Heating, 2=Humidity reduction, 3=Cooling, 4=Ventilation, clean air operation, 5=Auto Operation | ||
| MOmin | 5 | Fan Speed Setup | Command | 1=Auto, 2=Quiet, 3=Weak, 4=Strong, 5=Very strong (SH i) | ||
| MI | 6 | Fan Speed State | Read | 1=Auto, 2=Quiet, 3=Weak, 4=Strong, 5=Very strong (SH i) | ||
| MO | 7 | Air Direction Setup | Command | 1=Auto, 2=Position 1, 3=Position 2, 4=Position 3, 5=Position 4, 6=Position 5, 7=Swing | ||
| MI | 8 | Air Direction State | Read | 1=Auto, 2=Position 1, 3=Position 2, 4=Position 3, 5=Position 4, 6=Position 5, 7=Swing | ||
| MO | 9 | Temperature Units | Command | 1=ºC, 2=ºF | ||
| AImin | 10 | Inlet Temperature | °C/°F | Read | ||
| AImin | 11 | Fault Code | Read | |||
| BO | 12 | External Temperature ON/OFF Setup | Use AV 13 in place of the unit's own temperature | Command | 0=Feature OFF, 1=Feature ON | |
| AV | 13 | External Temperature Input | °C/°F | Command |
No points match these filters.
Object ID lookup: Mitsubishi Electric MelcoBEMS MINI Air-to-Air point IDs by name
Integration notes
- Access is not printed per object; it follows the guide's property table (AV, BO and multistate outputs have a writable present value and priority array; inputs are read-only).
- The adapter detects the connected unit type and only serves the matching object list (Air-To-Air, Air-To-Water or Lossnay).
- Temperature objects read in °C or °F according to the Temperature Units multistate output.
- The older MelcoBEMS MINI (A1M, BACnet MS/TP only) has the same objects 0-11 but not BO 12 / AV 13 (external temperature).
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 Procon MelcoBEMS MINI (A1M+) - Air-To-Air units 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 Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units
How many BACnet points does the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units have?
This list has 14 BACnet objects: 2 analog inputs, 2 analog values, 1 binary input, 2 binary outputs, 3 multi-state inputs, 4 multi-state outputs. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units BACnet points are writable?
8 of the 14 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 Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units BACnet documentation?
The source is Procon MelcoBEMS MINI (A1M+) Installation Manual (manual 1.0.3, firmware 4.1.1), published free by Mitsubishi Electric at https://library.mitsubishielectric.co.uk/pdf/download_full/5538.
What are the minimum BACnet points to integrate the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units?
Start with BO 0 Drive OFF/ON Setup (Unit on/off command); MO 3 Mode Setup (Mode command (heat/dry/cool/fan/auto)); AV 2 Setpoint (Temperature setpoint); MO 5 Fan Speed Setup (Fan speed command); BI 1 Drive OFF/ON State (On/off status); MI 4 Mode State (Current mode); AI 10 Inlet Temperature (Room (inlet) temperature); AI 11 Fault Code (4-digit fault code, 8000 = no error).
How do I enable BMS control of the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units?
No separate enable; the Setup objects command the indoor unit directly.
Can the BMS supply sensor values to the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units?
Set External Temperature ON/OFF Setup (BO 12) to ON and write External Temperature Input (AV 13); the unit then uses that value instead of its own temperature.
How do I check these points on the real Procon MelcoBEMS MINI (A1M+) - Air-To-Air units?
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 Mitsubishi Electric BACnet points lists
- VRF central controller with BACnet IP
Mitsubishi Electric AE-200J / AE-50J / EW-50J BACnet (Japan)
Japan-market CITY MULTI building air conditioning groups, Lossnay ventilators, DT-R, hot water heat pumps and brine coolers managed by an AE-200J, AE-50J or EW-50J.
Also known as: AE-200J, AE-50J, EW-50J, AE-200J BACnet, 三菱電機 AE-200J BACnet機能 - VRF central controller with BACnet IP
Mitsubishi Electric AE-C400 / EW-C50 BACnet (BACS-AP50)
CITY MULTI VRF indoor unit groups, Lossnay, OA processing units, Air To Water and chiller units managed by an AE-C400 or EW-C50.
Also known as: AE-C400, AE-C400E, EW-C50, EW-C50E, BACS-AP50, BACS-AP50E, AE-C/EW-C BACnet - VRF BACnet IP gateway
Mitsubishi Electric BAC-HD150 BM Adapter
CITY MULTI VRF indoor unit groups, Lossnay, and Air To Water (PWFY) units on M-NET, up to 50 groups.
Also known as: BAC-HD150, BAC-HD/150, BACHD150, BM ADAPTER, CMCN BACnet points list, MEAPP0002 - Variable frequency drive (inverter)
Mitsubishi Electric FR-E800 inverter (BACnet IP, Ethernet models)
Mitsubishi Electric FR-E800 compact inverters with the built-in Ethernet port (FR-E8xx-E and safety/IP67 Ethernet variants) set to BACnet/IP.
Also known as: FR-E800, FR-E800-E, FR-E820, FR-E840, FR-E860, IB-0600871ENG - Variable frequency drive (HVAC fan and pump)
Mitsubishi Electric FR-F800 inverter (BACnet MS/TP; FR-F800-E BACnet IP)
Mitsubishi Electric FR-F800 fan and pump inverters (FR-F820/F840/F842/F846) on the RS-485 terminals, and FR-F800-E models on the built-in Ethernet port.
Also known as: FR-F800, FR-F800-E, FR-F820, FR-F840, FR-F842, FR-F846, FR-F820-E, FR-F840-E, FR-F842-E, FR-F846-E, Mitsubishi FR-F800 BACnet, IB-0600547ENG, IB-0600628ENG - VRF BACnet IP interface (legacy)
Mitsubishi Electric PAC-YG31CDA BACnet Interface
CITY MULTI indoor unit groups managed by up to ten G-50A central controllers.
Also known as: PAC-YG31CDA, G-50A BACnet, BACnet Interface for G-50A - Split air conditioner BACnet IP gateway (legacy)
Mitsubishi Electric Procon BAC-A/50 (Mr. SLIM)
Mitsubishi Electric Mr. SLIM (A-control) split air conditioners, up to 50 outdoor units each fitted with a Sub I/F board.
Also known as: BAC-A/50, BACA50, Procon BAC A 50, RM2428 - VRF BACnet IP gateway (legacy)
Mitsubishi Electric Procon BAC-IP/50
CITY MULTI indoor units, Lossnay/OA units and heat-pump boilers connected to one G-50 central controller (up to 50 units).
Also known as: BAC-IP/50, BACIP50, Procon BAC IP 50 - Air-to-water heat pump interface
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Water (Ecodan) units
Mitsubishi Electric air-to-water (Ecodan) heat pump systems with an FTC controller, one adapter per system.
Also known as: A1M+ ATW, MelcoBEMS MINI A1M PLUS Ecodan, Procon A1M+ Ecodan - Energy recovery ventilator interface
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Lossnay units
Mitsubishi Electric Lossnay energy recovery ventilators supported by the A1M+ (listed in the manual appendix).
Also known as: A1M+ Lossnay, MelcoBEMS MINI A1M PLUS Lossnay - VRF central controller gateway
Mitsubishi Electric Procon MelcoBEMS2 (centralised controller BEMS gateway)
Mitsubishi Electric City Multi and split systems managed by an AE-C400/EW-C50, AE-200/EB50, AG-150A or GB-50ADA centralised controller (up to 50 groups).
Also known as: MelcoBEMS2, MelcoBEMS, Procon MelcoBEMS, MELCOBEMS
Source: Procon MelcoBEMS MINI (A1M+) Installation Manual (manual 1.0.3, firmware 4.1.1). Object names, instances and units are reproduced as published; descriptions are our own.