F01600

SI P1 (CU): STOP A initiated

Siemens · SINAMICS G120C Variable Speed Drive

What does F01600 mean?

The drive-integrated "Safety Integrated" function on processor 1 has detected an error and initiated a STOP A. This typically occurs due to an unsuccessful safety shutdown path check or as a consequence of F01611. This fault indicates a critical issue with the safety system, preventing drive operation and requiring immediate attention to ensure machine and personnel safety.

Common Causes

  • Failed forced checking procedure (FCP) of the safety shutdown path, possibly due to a stuck contactor or relay in the safe output chain.
  • External safety device (e.g., emergency stop button, safety gate switch) has activated, triggering the Safe Torque Off (STO) function.
  • Cross-monitoring fault between internal safety processors, indicating a deviation in expected safe state within Safety Integrated.
  • Incorrect wiring or loose connection to the Safety Integrated inputs (e.g., terminals X1, X2) causing an unintended safety state.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the status of all connected external safety components (e.g., E-stop, safety light curtains, safety door switches) for activation.

  2. 2

    Check the wiring integrity of the safety circuit, specifically the connections to the STO inputs (e.g., X1, X2 terminals on safety module).

  3. 3

    Review the drive's safety log (r9700) for specific details on the triggering event and the status of internal safety signals.

  4. 4

    Initiate a forced checking procedure (FCP) via parameter P9500 to confirm the functionality of the safety output path.

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Verified technical data. Last updated: March 2026

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Source: Siemens SINAMICS G120C Variable Speed Drive