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ErrorLib — Industrial Fault Code Library

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F01693

Safety parameterization changed, POWER ON required

Siemens · SINAMICS G120

What does F01693 mean?

Safety-related parameters have been modified, requiring a power cycle for the changes to take effect and be properly stored. Operating without a power cycle could result in an inconsistent or unapplied safety state, compromising machine safety.

Common Causes

  • Modification of any safety-relevant parameter (e.g., p9500 (SLS enable), p9650 (STO timer)) without subsequent power cycling of the drive.
  • A safety configuration upload or download operation was performed, but the system has not been rebooted to apply changes.
  • Internal safety checksum mismatch detected after parameter changes, necessitating a full system re-initialization.
  • Drive operating system requires a hardware reset to properly store and activate updated safety functionality.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Power off the entire drive system (main supply, not just control power) and wait for the power module discharge LEDs to extinguish.

  2. 2

    2. Power on the drive system to allow the new safety parameterization to take full effect and be stored in non-volatile memory.

  3. 3

    3. After power cycling, verify the status of the modified safety parameters to confirm they are active and correctly stored.

  4. 4

    4. If the fault persists, re-enter the safety-related parameter changes and ensure a complete power cycle follows.

  5. 5

    5. Perform a safety signature comparison (e.g., r9750, r9751) to confirm consistency after power-up.

Browse all codes in this manual (109)
Verified technical data. Last updated: April 2026

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Source: Siemens SINAMICS G120
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