IntesisBox PA-RC2-MBS-1

Installation

1. 1Connect the IntesisBox PA-RC2-MBS-1 to the Panasonic indoor unit using the unit's communication port, following the IntesisBox wiring diagram for your specific model.
2. 2Wire the RS-485 (A and B) terminals of the IntesisBox to the RS-485 port on the ModbusCloud gateway (MCG or MLP series), observing correct polarity and using a termination resistor if it is the last device on the bus.
3. 3Set the Modbus slave address on the IntesisBox using its DIP switches or configuration software, and ensure no address conflicts exist on the bus.
4. 4Configure the ModbusCloud gateway serial port for Modbus RTU at 9600 baud, 8 data bits, 1 stop bit, no parity, matching the IntesisBox default settings.
5. 5Import the IntesisBox PA-RC2-MBS-1 template in the ModbusCloud platform and assign it to the correct gateway and slave address.
6. 6Verify communication by reading the current setpoint register and toggling the on/off control from the dashboard.

Things to watch for

01

The documentation mentions both Panasonic and Fujitsu. Which air conditioners does the PA-RC2-MBS-1 support?

The device name and primary labeling reference Panasonic air conditioners. However, some descriptions also mention Fujitsu. Always verify compatibility with your specific indoor unit model and consult the IntesisBox compatibility list before purchasing.

02

Why does reading the setpoint return a different value than what I just wrote?

The PA-RC2-MBS-1 uses different register addresses for reading and writing the setpoint. The current setpoint is read from register 23, while new setpoint commands are written to register 4. This is normal behavior for this interface.

03

I cannot establish communication with the IntesisBox on the Modbus bus.

Confirm that the baud rate is set to 9600 on both the gateway and the IntesisBox. Check RS-485 wiring polarity (A to A, B to B) and ensure the slave address matches. If the bus is longer than 10 meters, add a 120 ohm termination resistor at each end.

04

Can I connect multiple IntesisBox units to one ModbusCloud gateway?

Yes, multiple PA-RC2-MBS-1 units can share a single RS-485 bus. Assign a unique Modbus slave address to each unit using the DIP switches or configuration tool, and add a separate template instance in ModbusCloud for each address.

Registers (5)

1 read / 4 write

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