IntesisBox ME-AC-MBS-1
Controls Mitsubishi Electric air conditioners via Modbus RTU interface.
The IntesisBox ME-AC-MBS-1 is a Modbus RTU interface for Mitsubishi Electric domestic and Mr. Slim air conditioners. This template reads on/off status, operating mode, temperatures, and alarm codes, and allows control of setpoint, fan speed, vane position, and power state.
- Protocol
- Modbus RTU
- Connection
- RS485, 9600 baud
- Registers
- 14, read and write
- Brand
- Intensis
- Key readings
- On/Off status · Mode · Fan speed · Temperature setpoint · Ambient temperature (AC and external) · Alarm status and error code
- Available commands
- On/Off · Mode and fan speed · Temperature setpoint · Vane position
- Compatible models
- ME-AC-MBS-1
- Last updated
Registers (14)
14 read, 10 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| FanSpeed | °C | Read and write | |||
| Mode | °C | Read and write | |||
| TemperatureSetpoint | °C | Read and write | |||
| OnOff | °C | Read and write | |||
| WindowContact | °C | Read and write | |||
| ControlDisablement | °C | Read and write | |||
| RemoteControlDisablement | °C | Read and write | |||
| OperationTime | °C | Read and write | |||
| AlarmStatus | °C | Read | |||
| ErrorCode | °C | Read | |||
| VanePosition | °C | Read and write | |||
| TemperatureAmbientExt | °C | Read and write | |||
| TemperatureAmbientAC | °C | Read | |||
| TemperatureSetpointAC | Read |
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Use cases
- Monitor ambient temperature and operating mode of Mitsubishi Electric air conditioners on a live cloud dashboard.
- Adjust temperature setpoints and fan speed remotely without visiting the site.
- Create an alert when an alarm or error code is reported by the indoor unit.
- Track operation time across multiple air conditioning units for planned maintenance scheduling.
- Verify that vane position and mode settings match the agreed comfort profile for a customer.
- Disable local remote control temporarily during commissioning or maintenance windows.
Installation
Connect the ME-AC-MBS-1 to the Mitsubishi Electric indoor unit using the proprietary connector as described in the IntesisBox installation manual.
Wire the EIA-485 (A, B, GND) terminals of the ME-AC-MBS-1 to the RS-485 port on your ModbusCloud Gateway.
Set the Modbus slave address on the ME-AC-MBS-1 using the DIP switches or configuration tool, and ensure the baud rate is set to 9600.
In the ModbusCloud platform, add a new device and import the IntesisBox ME-AC-MBS-1 template from the template library.
Assign the correct slave address in ModbusCloud to match the address configured on the physical device.
Verify communication by checking that on/off status and ambient temperature values appear on the dashboard.
Things to watch for
The gateway shows no response from the ME-AC-MBS-1. What should I check?
Verify that the RS-485 wiring is correct, with A to A, B to B, and GND connected. Confirm the baud rate is set to 9600 on both the gateway and the ME-AC-MBS-1. Check that the slave address in ModbusCloud matches the address configured on the device.
Temperature values appear incorrect or zero. Why?
The ME-AC-MBS-1 reports temperature in whole degrees as uint16 values. Check the register scaling in your template. Also confirm the indoor unit is powered on and communicating with the interface, as values remain at zero until the AC unit responds.
Can I control multiple indoor units from one ModbusCloud gateway?
Yes. Each ME-AC-MBS-1 interface serves one indoor unit and has its own Modbus slave address. You can daisy-chain multiple units on the same RS-485 bus and import a separate template instance for each address.
Write commands for mode or setpoint do not seem to take effect. What is wrong?
Ensure that remote control disablement is not active on the ME-AC-MBS-1. Also verify the indoor unit is powered on. Some mode changes are only accepted when the unit is in the on state.
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