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0x7696

EPM data: unknown parameter found

Lenze · i550 Protec Drive

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The memory module (EPM) contains parameter settings that are not recognized by the current inverter software. This can happen after firmware updates or compatibility changes.

Häufige Ursachen

  • Firmware version of the inverter is older than the firmware version used to save parameters to the EPM, resulting in unrecognized new parameters.
  • A firmware update on the inverter changed or removed certain parameters, and the EPM still holds values for these outdated parameters.
  • The EPM module was used with a different drive model or series that has a distinct parameter set, leading to foreign parameter entries.
  • Data corruption on the EPM module, causing invalid parameter addresses or values to be stored.
  • Improper parameter saving process, potentially leading to incomplete or corrupted data on the EPM.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Connect to the inverter with the configuration software and upload parameters from the EPM to identify the 'unknown' parameters if possible.

  2. 2

    Update the inverter's firmware to the latest available version. Then perform a parameter initialization (e.g., P99.00 = 1) and reconfigure parameters.

  3. 3

    If a known good and compatible EPM is available, try swapping it to see if the fault clears.

  4. 4

    Perform a factory reset of the inverter (e.g., P99.00 = 1) to ensure all parameters are at default values, then re-enter application-specific settings.

  5. 5

    Manually review and compare the parameter list from the EPM (if readable) with the current inverter's parameter manual to pinpoint discrepancies.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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