Cause : Checksum mismatch - comes when the calculated parameter checksum does not match any enabled reference checksum.

This is a Programmable warning: 96.54 Checksum action.

1. Check that all necessary approved (reference) checksum ( 96.71…96.72) are enabled in 96.55 Checksum control word.
2. Check the parameter configuration using 96.55 Checksum control word, enable a checksum parameter and copy the actual checksum into that parameter.