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ErrorLib — Industrial Fault Code Library

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F00073

Control Panel setpoint fault

Siemens · SINAMICS G120

What does F00073 mean?

The drive is not receiving setpoint values from the Control Panel within the specified telegram off time. This indicates a communication issue or incorrect timing between the control panel and the drive, causing a loss of command signals and controlled operation, thus preventing manual control.

Common Causes

  • Loose or faulty physical connection of the drive's operator panel (e.g., BOP-2, IOP-2) to the drive unit.
  • Hardware fault within the control panel itself, preventing it from sending setpoint commands or status updates correctly.
  • Incorrect parameter configuration on the drive related to control source selection (e.g., P0700 not set to `1` for BOP/IOP control).
  • The telegram off time setting (e.g., P0704 or P0705 for panel communication) is configured too short for the control panel's update rate.
  • Electrical noise interfering with the panel's internal communication path to the drive's CPU.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Re-seat the control panel (e.g., BOP-2 or IOP-2) firmly onto the drive unit's designated slot, ensuring good electrical contact.

  2. 2

    2. Verify drive parameter P0700 (Command source) is correctly set to `1` (BOP/IOP) or the appropriate value for the specific control panel type.

  3. 3

    3. Check the control panel display for any self-diagnostic errors, blank screens, or freezing, which might indicate a panel hardware fault.

  4. 4

    4. Increase the telegram off time parameter (e.g., P0704 for basic panel communication) in increments of 50ms and observe if the fault clears.

  5. 5

    5. Test with a known good control panel if available to rule out a faulty panel unit as the source of the issue.

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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