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W 

Watchdog Timer Error

Mitsubishi Electric · MELSEC iQ-R Motion Controller

¿Qué significa W  ?

This error indicates a watchdog timer fault, where the system's watchdog mechanism has not been reset within its expected interval. This typically points to a software malfunction or an unresponsive process within the Motion CPU module, or a hardware error.

Causas comunes

  • Software malfunction causing the watchdog timer to expire
  • Unresponsive process within the Motion CPU module
  • Hardware error impacting watchdog timer operation

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check the error cause with 'Motion CPU WDT error cause (SD512)' using MT Developer2 to diagnose the specific watchdog error.

  2. 2

    Remove the identified error cause (e.g., correct program logic, optimize processing).

Ver todos los códigos en este manual (19)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Mitsubishi Electric MELSEC iQ-R Motion Controller