MM Safety Test Stop Fault

What does F30773 mean?

A safety test stop fault has occurred on the Motor Module (MM) side. This fault indicates that while the MM's internal states may be as expected, the required state was not present on the readback input of the other channel (Control Unit). This suggests an inconsistency in the safety test routine between the CU and MM, affecting the overall safety integrity and requiring investigation.

Complete Troubleshooting Guide

1. 1

   Check the wiring of the F-DOs (Fail-Safe Digital Outputs) and their associated readback signals, especially connections between the CU and MM.

2. 2

   Restart the test stop procedure to attempt to clear the fault and re-evaluate the safety circuit.

3. 3

   If multiple test stop faults exist, clearing the current one will allow the next queued fault to be signaled for diagnosis.