Why is the serial communication on PCD3.Mxxx7 or PCD2.M5xx7 Port 0 not working properly?

FAQ #100554

 

Problem
The serial communication on Port 0 works not properly.

Reason
Per default the Port 0 is assigned as MPI-Port. This configuration has to be switched to another port, otherwise the Port 0 can not be used for serial communication

Solution
Add the following CDB 1023:

Note that the O in the part 8,O,1 is a letter O for Odd and not a zero. It only works when the implemented CDB has exactely the entrys shown in the picture above (case sensitive).