SI Motion CU: Checksum error safety monitoring functions

What does 201680 mean?

This fault indicates a discrepancy between the drive's calculated checksum for safety-relevant parameters (r9728) and the reference checksum saved during the last machine acceptance (p9729). This means that safety-relevant parameters have either been changed inadvertently, or a fault exists in the system impacting their integrity. This fault results in a STOP A, requiring immediate attention to maintain safety integrity and prevent unsafe machine operation.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Diagnose for potential internal faults within the Control Unit if no parameter changes were intended and the checksum error persists after power cycling.