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Energy recovery ventilator interface · BACnet points list
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Lossnay units BACnet points list
Updated 11 November 2026
For Lossnay energy recovery ventilators the MelcoBEMS MINI (A1M+) serves power, mode, ventilation mode, fan speed and setpoint commands on BACnet MS/TP or BACnet IP, plus supply, outdoor and room temperatures, CO2, energy, filter and maintenance signs and a set of capability flags as analog inputs.
This page lists 40 BACnet objects for the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Lossnay units — 6 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+) - Lossnay units
- Equipment
- Energy recovery ventilator interface
- Equipment type
- Rooftop units, AHUs & DOAS
- BACnet objects
- 40 (6 writable)
- Transport
- BACnet IP, BACnet MS/TP
- Firmware
- 4.1.1
- Also known as
- A1M+ Lossnay, MelcoBEMS MINI A1M PLUS Lossnay
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+) - Lossnay units
Select BACnet with DIP switch 7, then write power, mode, ventilation mode and fan speed, and read temperatures, CO2 and the filter and maintenance signs.
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 | Lossnay Drive OFF/ON Setup | Power on/off command | Command |
| MO 1 | Lossnay Mode Setup | Mode command (heat/cool/fan/auto) | Command |
| MO 2 | Lossnay Vent Mode Setup | Ventilation mode (Lossnay/bypass/auto) | Command |
| MO 3 | Lossnay Fan Speed A Setup | Fan speed command | Command |
| AV 4 | Lossnay Temperature Setpoint A | Temperature setpoint | Command |
| AI 7 | Lossnay Room Temperature A | Room temperature | Read |
| AI 8 | Lossnay Room Co2 Level | Room CO2 / 10 (254 detecting, 255 no sensor) | Read |
| AI 15 | Lossnay Filter Sign | Filter sign, 1 = active | Read |
| AI 14 | Lossnay Maintenance Sign | Maintenance sign, 1 = active | Read |
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
- AI 8 is CO2 divided by 10 (0-240 = 0-2400 ppm).
- Capability flags (AI 19-38) tell which functions and sensors the connected Lossnay has.
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Lossnay 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 | Lossnay Drive OFF/ON Setup | Command | 0=Power OFF, 1=Power ON | ||
| MOmin | 1 | Lossnay Mode Setup | Command | 1=Heat, 2=Cool, 3=Fan, 4=Auto | ||
| MOmin | 2 | Lossnay Vent Mode Setup | Command | 1=Lossnay mode, 2=Bypass mode, 3=Auto mode | ||
| MOmin | 3 | Lossnay Fan Speed A Setup | Command | 1=Auto, 2=Speed 1, 3=Speed 2, 4=Speed 3, 5=Speed 4 | ||
| AVmin | 4 | Lossnay Temperature Setpoint A | °C/°F | Command | ||
| AI | 5 | Lossnay Supply Air Temperature A | °C/°F | Read | ||
| AI | 6 | Lossnay Outdoor Temperature Int | °C/°F | Read | ||
| AImin | 7 | Lossnay Room Temperature A | °C/°F | Read | ||
| AImin | 8 | Lossnay Room Co2 Level | CO2 level divided by 10. | Read | ||
| AI | 9 | Lossnay Thermo Onoff | Read | 0=Thermo OFF, 1=Thermo ON | ||
| AI | 10 | Lossnay Energy Consumption | "Value in kWh multiplied by 10. | Read | ||
| AI | 11 | Lossnay Actual Operation Mode | Read | 1=Not auto mode, 2=Determining, 3=Heating, 4=Cooling | ||
| AI | 12 | Lossnay Auto Fan Speed Control Availability | Read | 0=Not available, 1=Available | ||
| AI | 13 | Lossnay Night Purge | Read | 0=Normal operation, 1=In night purge operation | ||
| AImin | 14 | Lossnay Maintenance Sign | Read | 0=Inactive, 1=Active | ||
| AImin | 15 | Lossnay Filter Sign | Read | 0=Inactive, 1=Active | ||
| AI | 16 | Lossnay Actual Ventilation Mode | Read | 0=Lossnay ventilation, 1=Bypass ventilation | ||
| AI | 17 | Lossnay Actual Supply Fan Speed | Read | 1=Stop, 2=Speed 1, 3=Speed 2, 4=Speed 3, 5=Speed 4 | ||
| AI | 18 | Lossnay Actual Extract Fan Speed | Read | 1=Stop, 2=Speed 1, 3=Speed 2, 4=Speed 3, 5=Speed 4 | ||
| AI | 19 | Lossnay Setpoint 0.5ºC Increments Availability | Read | 0=Not available, 1=Available | ||
| AI | 20 | Lossnay Heat/Cool or Cool- Only | Read | 0=Heat and Cool, 1=Cool only | ||
| AI | 21 | Lossnay Auto Operation Mode Availability | Read | 0=Not available, 1=Available | ||
| AI | 22 | Lossnay Heat/Cool or Heat- Only | Read | 0=Heat and Cool, 1=Heat only | ||
| AI | 23 | Lossnay Minimum Cooling Setpoint | °C/°F | Read | ||
| AI | 24 | Lossnay Maximum Cooling Setpoint | °C/°F | Read | ||
| AI | 25 | Lossnay Minimum Heating Setpoint | °C/°F | Read | ||
| AI | 26 | Lossnay Maximum Heating Setpoint | °C/°F | Read | ||
| AI | 27 | Lossnay Minimum Auto Setpoint | °C/°F | Read | ||
| AI | 28 | Lossnay Maximum Auto Setpoint | °C/°F | Read | ||
| AI | 29 | Lossnay Energy Consumption Data Available | Read | 0=Not available, 1=Available | ||
| AI | 30 | Lossnay Number Of Fan Speeds | Values 1 – 4 valid | Read | ||
| AI | 31 | Lossnay Bypass Damper Function | 7-segment error code digit (code table in guide) | Read | ||
| AI | 32 | Lossnay Auto Ventilation Mode Available | Read | 0=Not available, 1=Available | ||
| AI | 33 | Lossnay Operation Mode off Temperature Control Unit | Read | 0=Not available (not connected), 1=Available (connected) | ||
| AI | 34 | Lossnay Set Temperature on Temperature Control Unit | Read | 0=No set temperature display, 1=RA (Return Air) temperature, 2=SA (Supply Air) temperature | ||
| AI | 35 | Lossnay Outdoor Temperature Sensor | Read | 0=Not equipped, 1=Equipped | ||
| AI | 36 | Lossnay Return Air Temperature Sensor | Read | 0=Not equipped, 1=Equipped | ||
| AI | 37 | Lossnay Supply Air Temperature Sensor | Read | 0=Not equipped, 1=Equipped | ||
| AI | 38 | Lossnay CO2 Sensor | Read | 0=Not equipped, 1=Equipped | ||
| MO | 39 | Temperature Units | Command | 1=ºC, 2=ºF |
No points match these filters.
Object ID lookup: Mitsubishi Electric MelcoBEMS MINI Lossnay point IDs by name
BO0Lossnay Drive OFF/ON SetupMO1Lossnay Mode SetupMO2Lossnay Vent Mode SetupMO3Lossnay Fan Speed A SetupAV4Lossnay Temperature Setpoint AAI5Lossnay Supply Air Temperature AAI6Lossnay Outdoor Temperature IntAI7Lossnay Room Temperature AAI8Lossnay Room Co2 LevelAI9Lossnay Thermo OnoffAI10Lossnay Energy ConsumptionAI11Lossnay Actual Operation ModeAI12Lossnay Auto Fan Speed Control AvailabilityAI13Lossnay Night PurgeAI14Lossnay Maintenance SignAI15Lossnay Filter SignAI16Lossnay Actual Ventilation ModeAI17Lossnay Actual Supply Fan SpeedAI18Lossnay Actual Extract Fan SpeedAI19Lossnay Setpoint 0.5ºC Increments AvailabilityAI20Lossnay Heat/Cool or Cool- OnlyAI21Lossnay Auto Operation Mode AvailabilityAI22Lossnay Heat/Cool or Heat- OnlyAI23Lossnay Minimum Cooling SetpointAI24Lossnay Maximum Cooling SetpointAI25Lossnay Minimum Heating SetpointAI26Lossnay Maximum Heating SetpointAI27Lossnay Minimum Auto SetpointAI28Lossnay Maximum Auto SetpointAI29Lossnay Energy Consumption Data AvailableAI30Lossnay Number Of Fan SpeedsAI31Lossnay Bypass Damper FunctionAI32Lossnay Auto Ventilation Mode AvailableAI33Lossnay Operation Mode off Temperature Control UnitAI34Lossnay Set Temperature on Temperature Control UnitAI35Lossnay Outdoor Temperature SensorAI36Lossnay Return Air Temperature SensorAI37Lossnay Supply Air Temperature SensorAI38Lossnay CO2 SensorMO39Temperature Units
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.
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+) - Lossnay 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+) - Lossnay units
How many BACnet points does the Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Lossnay units have?
This list has 40 BACnet objects: 34 analog inputs, 1 analog value, 1 binary output, 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+) - Lossnay units BACnet points are writable?
6 of the 40 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+) - Lossnay 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+) - Lossnay units?
Start with BO 0 Lossnay Drive OFF/ON Setup (Power on/off command); MO 1 Lossnay Mode Setup (Mode command (heat/cool/fan/auto)); MO 2 Lossnay Vent Mode Setup (Ventilation mode (Lossnay/bypass/auto)); MO 3 Lossnay Fan Speed A Setup (Fan speed command); AV 4 Lossnay Temperature Setpoint A (Temperature setpoint); AI 7 Lossnay Room Temperature A (Room temperature); AI 8 Lossnay Room Co2 Level (Room CO2 / 10 (254 detecting, 255 no sensor)); AI 15 Lossnay Filter Sign (Filter sign, 1 = active); AI 14 Lossnay Maintenance Sign (Maintenance sign, 1 = active).
How do I check these points on the real Procon MelcoBEMS MINI (A1M+) - Lossnay 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 - Split / VRF indoor unit interface (single unit)
Mitsubishi Electric Procon MelcoBEMS MINI (A1M+) - Air-To-Air units
Mitsubishi Electric air-to-air split and indoor units connected one per adapter through the CN105 connector.
Also known as: A1M+, MelcoBEMS MINI A1M PLUS, MelcoBEMS MINI (A1M), Procon A1M - 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 - 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.