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A0  H

Output short-circuit detection

Mitsubishi Electric · MELSEC iQ-R I/O Module

Was bedeutet A0  H ?

A short-circuit has been detected on an output terminal. This indicates an abnormally low resistance path, likely causing excessive current flow, which can damage the module or connected components if not addressed promptly.

Häufige Ursachen

  • Short-circuit in the output wiring between the module and the load.
  • Internal short-circuit within the connected output load (e.g., actuator, solenoid).
  • Damage to the output terminal itself, creating a short.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Identify and eliminate the short-circuit in the output wiring or connected load.

  2. 2

    After recovery from the short-circuit, turn 'Alarm clear request' (Y11) on and off to clear the alarm.

  3. 3

    Verify that 'Output short-circuit detection status' reads 0 (Normal) and 'Alarm flag' (X11) turns off after clearing.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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Quelle: Mitsubishi Electric MELSEC iQ-R I/O Module