Controlling Daikin VRV central air conditioning system via DTA116A51 board with Modbus protocol.

Hello everyone,

I am currently trying to connect and control a Daikin VRV central air conditioning system via the DTA116A51 board using the Modbus protocol. However, I am unable to read or write 3 or 8 bits... from the 16-bit Holding Register or Input Register to bOS. Do you have any solutions to this problem? Please help me.

D3NET-Modbus+Communication+adaptor_Function....pdf