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1005

CPU Down Error

Mitsubishi Electric · MELSEC System Q/L Series

Was bedeutet 1005 ?

The CPU module has experienced a runaway condition or failure, potentially due to electrical noise or a hardware fault. For Qn(H), QnPH, and QnPRH models, this error can also occur if a boot operation was performed without formatting the program memory.

Häufige Ursachen

  • Runaway or failure of CPU module.
  • Malfunctioning due to noise or other external reasons.
  • Hardware fault within the CPU module.
  • Boot operation was performed in the transfer destination without formatting program memory (Qn(H), QnPH, QnPRH models).

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Implement noise reduction measures for the control system environment.

  2. 2

    Reset the CPU module and attempt to RUN it again.

  3. 3

    If the same error is displayed again after resetting, diagnose for a CPU module hardware fault.

  4. 4

    Before performing boot operation by the parameter, select 'Clear program memory' to clear the program memory.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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Quelle: Mitsubishi Electric MELSEC System Q/L Series