Modbus error

[dezsoe]

Thanks, I'll check it.

[dezsoe]

You call 2 functions: Read_Coils (1) and Write_MultipleCoils (15), but none of them is supported by the board. In its manual you can find that function 3, 6 and 16 are supported, which are: Read_Holding_Registers, Write_Single_Register and Write_Multiple_Registers. The last (Write_Multiple_Registers) is not always supported, see the manual.

[Socke]

I‘ve seen that in the manual. This is witchcraft to me, because I’m new to this modbus-stuff. But I’m willing to learn, so how can I get further to establish a communication?