Help with a first knx to modbus

[stevesu]

so if i use following for writing to register 33280 , witch have functioncode 3,4 & 16 (datasheet)

Code:

{ "name": "Flow Rate Setpoint", "bus_datatype": "05", "type": "register", "address":33280, "writable": true , "value_delta": "0", "datatype": "float16" },

and for only reading the actual setpoint in register 33282 , witch have functioncode 3,4

Code:

{ "name": "Actual Flow Rate", "bus_datatype": "05", "type": "inputregister", "address":33282, "writable": 0, "value_delta": "0" , "datatype": "float16" },

ps: when i read "register" i must actually read "holding register".

sorry for asking these qeustions, but it is all new for me and having someone to explane it  makes it a bit easier