Update: After Correcting a Issue with the Client device (the Baud rate wasn't the one mensioned as standard, although it was a new device and i unpacked it my own) it gives me now errors anymore. At the moment I didn't controll the data i transmitt/received.
I use a connect 5: with Linux.Devicefile=/dev/ttyAMA and Com-Port 5 in Codesys instead of the mensioned /dev/ttyRS485-0 -> COM Port 1.