Daikin RTD-RA

Integrate up to 32 Daikin Devices.

Device Station Settings

Enter the Slave IDs in the Slaves field, separated by a comma.

Example: 1,2,3,4,...

Function Description

Daikin fan coil units operate as Modbus slaves, while the controller operates as the Modbus master. By default, the controller regulates the room temperature by sending the fan speed and On/Off mode to the individual fan coil units.

The user can set the desired temperature thresholds directly in the Room Control system. Heating and cooling operation can be switched using configurable actions/timers.

The Daikin modes Auto, Fan and Dehumidification cannot be controlled.

Note

The remote control can be used when individual rooms have been switched off, so that the controller does not send any fan speed changes to the fan coil units.

Connection

The real-time converter is installed in each fan coil unit and connected to the RS485 bus using 3 wires (A/B/GND). (e.g. FTDI: A− = yellow, B+ = orange).

To enable Modbus on the converter, simply set an address >= 1 using DIPS 3 to 8. The first 2 DIPs can remain disabled unless you want to use a Modbus timeout to enable local operation. In this case, the corresponding registers must be written.

The fan coil units are also connected separately to the outdoor unit. Heating operation is only possible below the standard outdoor temperature of 18 °C.

Create one Room Control element for each fan coil unit.

Room Control IO Configuration – Sensors:

• Temperature: Specify the temperature sensor.

Room Control IO Configuration - Indication/Controls:

Select Mode Daikin Modbus RTD-RA

Room Control - Parameters:

Increase the controller speed:

• P gain: 25
• I gain: 5
• Integration time I: 300 s