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ErrorLib — Industrial Fault Code Library

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F01612

Diff. in hardw. detection

Siemens · SINAMICS G120

What does F01612 mean?

The drive's internal hardware (safety or non-safety related) could not be correctly identified during startup or runtime. This indicates a mismatch between the expected and detected hardware configuration or a fundamental issue with processor communication, preventing the drive from operating safely.

Common Causes

  • Incorrectly inserted or faulty optional modules (e.g., communication board, sensor module, Terminal Module) in the drive's slots.
  • Control unit (e.g., CU250S-2, CU320-2) hardware version mismatch with the loaded configuration or the expected firmware version.
  • Corrupted internal configuration data preventing proper hardware identification during startup.
  • Loose internal connections or damaged components on the main control unit board causing faulty detection.
  • Attempting to restore a parameter set from a different hardware variant or type of drive that is incompatible with the installed unit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Power cycle the drive and check if the fault clears, as it might be a temporary detection issue.

  2. 2

    2. Power down the drive, then verify that all optional modules (e.g., TM modules, CBE cards) are correctly seated in their slots and are compatible with the drive model.

  3. 3

    3. Check the firmware version of the control unit and ensure it is compatible with all installed hardware components and the project configuration.

  4. 4

    4. Back up the drive parameters, perform a factory reset (P0010=30, P0970=1), and then reload a known good parameter set created for this specific hardware configuration.

  5. 5

    5. Review parameter r0947 (Fault history) for additional details or sub-faults that might specify which hardware component is causing the identification issue.

  6. 6

    6. If possible, test by temporarily removing non-essential optional modules one by one to isolate the faulty or incompatible component.

  7. 7

    7. Replace the control unit (e.g., CU320-2 PN) if the fault persists and no specific module is identified as faulty, indicating an internal hardware defect.

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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