SI MM: STOP A initiated
Siemens · SINUMERIK 828D
What does 230600 mean?
This fault signifies that the drive-based Safety Integrated (SI) function in the Motor Module (MM) has detected a critical anomaly, initiating a STOP A (pulse suppression via the safety shutdown path of the Motor Module). This can result from an unsuccessful forced checking procedure of the safety path, an internal software error (fault value 1020), or a response to a monitoring channel defect (F30611). This safety-critical fault immediately halts motor operation to prevent hazardous conditions, requiring immediate attention to restore safe functionality.
Common Causes
- Detection of an internal safety fault within the Motor Module (MM) hardware or firmware (e.g., internal processor error, self-test failure).
- Discrepancy or failure in the safety input signals specifically monitored by the Motor Module (e.g., Safe Torque Off feedback).
- Checksum error in the safety-relevant parameters of the MM after a download or firmware update.
- Failure of a safety-relevant component on the MM causing it to initiate a safe state.
- Loss of communication between the Control Unit (CU) and the Motor Module (MM) regarding safety commands (e.g., Drive-Cliq cable issue).
Repair Steps & Checklist
Click steps to track your progress.
- 1
1. Identify the specific cause code associated with STOP A in the drive's diagnostic buffer (e.g., r0947, r949) on the Motor Module.
- 2
2. Perform an online safety diagnostics check using the engineering tool (e.g., TIA Portal Safety Integrated Editor) to read detailed safety fault information for the Motor Module.
- 3
3. Verify all safety parameters related to the Motor Module (e.g., P9500-P9600 settings for MM) are correctly configured and match the safety program.
- 4
4. Check the physical connection and communication between the Control Unit and the Motor Module (e.g., Drive-Cliq cables) for damage or secure fit.
- 5
5. Cycle power to the drive (main power off/on) to reset the Motor Module and observe if the fault persists. If it does, replacement of the Motor Module might be necessary.