C01798
Test stop for motion monitoring is running
Siemens · SINAMICS G120
What does C01798 mean?
The inverter is currently performing a forced checking procedure (test stop) for its extended motion monitoring functions. This is a normal operational state during a safety test and indicates that the system is validating its safety capabilities.
Common Causes
- Automatic periodic test for motion monitoring functions initiated by the safety controller.
- Manual initiation of a safety test via HMI or safety engineering software (e.g., Startdrive).
- System power cycle or reset triggering a safety self-test for motion monitoring.
- Configuration change in safety parameters (e.g., P30650) requiring a verification test.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Monitor status parameter r0949 for the test progress and completion status.
- 2
Confirm the status LED on the safety module (e.g., integrated safety F-CPU) indicates test activity.
- 3
Wait for the test duration specified in Parameter P30650 (test interval) to complete.
- 4
Verify that the motion monitoring safety function (e.g., Safe Speed Monitor) correctly re-engages after the test.
Verified technical data. Last updated: March 2026
Related Faults
Source: Siemens SINAMICS G120