PR0

Error in parameter set

Lenze · 9300 Series

What does PR0 mean?

This error occurs when the operating system software has been updated and requires the storage of the Lenze setting to ensure compatibility. This typically happens after a firmware upgrade.

Common Causes

  • Firmware update changed the internal parameter mapping or data structure, making the old parameter set incompatible.
  • Failure to save the updated default parameters after a firmware upgrade, causing a mismatch with the new operating system.
  • Incomplete firmware update process, resulting in a partially updated operating system that cannot correctly interpret parameters.
  • Discrepancy between the loaded application software and the underlying firmware, requiring a parameter re-initialization.
  • Corrupted system parameter block during the update, preventing the device from loading any valid configuration.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Immediately save the current parameter set after a firmware update (e.g., using P0-01 = 1) to align with the new OS.

  2. 2

    Re-load the latest compatible firmware version, ensuring the entire update process completes without interruption.

  3. 3

    Perform a factory reset (e.g., using parameter P0-01 = 0) to re-initialize all parameters to their default values compatible with the new firmware.

  4. 4

    Manually re-enter critical application parameters or load a known compatible backup parameter file after the factory reset.

  5. 5

    Verify the firmware version displayed on the device (e.g., parameter C0000) matches the expected version for the parameter set.

  6. 6

    Cycle power to the device after saving or loading parameters to ensure the changes are fully applied and validated.

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Verified technical data. Last updated: March 2026

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