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F7C4

No Communication After Resends

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

Hva betyr F7C4 ?

Communication failed persistently even after executing the designated number of resends. This indicates a fundamental communication breakdown that retries cannot overcome.

Vanlige årsaker

  • Persistent network communication failure
  • Issues with the target station
  • Insufficient arrival monitoring time

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Increase the value of the arrival monitoring time in the system settings

  2. 2

    Conduct a thorough check of the entire network infrastructure for physical faults or misconfigurations

  3. 3

    Verify the operational status and configuration of the target stations

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Verifisert teknisk data. Sist oppdatert: March 2026

Relaterte feilkoder

Kilde: Mitsubishi Electric MELSEC Q-series MELSECNET/H