Thanks, i will try this one with my STM Board in the Future.
But now i have a different problem here, i got this Beckhoff BK9000 Ethernet Field-Bus-Controller for some IO-Cards
The Documentary states that the device is Modbus compatible an a managed to get it working.
After then altering the program i testet, the OpenPLC Dashboard just spits out errors
Modbus Write Coils failed on MB device Beckhoff BK9000: Bad file descriptor
The problem occurs sometime and sometimes it does not and the OpenPLC just controls the registers as it should
Could you help me with this one?