C01799
Acceptance test mode active
Siemens · SINAMICS G120
What does C01799 mean?
The acceptance test mode is currently active, indicating that safety functions are being validated. This is a normal state during commissioning or re-validation of safety parameters and functions.
Common Causes
- Commissioning engineer explicitly activated acceptance test mode via control panel or engineering software (e.g., Safety Integrated Commander).
- Safety parameters (e.g., P30600, P30601) were modified, requiring re-validation of safety functions.
- Initial power-up or system reset after a major configuration change or firmware update.
- Completion of a mandatory safety documentation procedure for machine validation.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Confirm the acceptance test mode activation status on the HMI or drive display (r2124).
- 2
Follow the acceptance test procedure specified in the machine's safety documentation or commissioning manual.
- 3
Deactivate acceptance test mode via control word (e.g., Profisafe telegram bit or P30999) once validation is complete.
- 4
Ensure all safety functions (e.g., STO, SS1, SLS) pass their respective validation steps and document results.
Verified technical data. Last updated: March 2026
Related Faults
Source: Siemens SINAMICS G120