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1500H

Safety I/O HOLD time exceeded error

Mitsubishi Electric · MELSEC iQ-R I/O Module

¿Qué significa 1500H ?

The duration for which the I/O system remained in a HOLD state exceeded its pre-set time limit. This typically occurs in safety-critical applications when there are issues with system switching or communication with Safety Integrity Level 2 (SIL2) Process CPUs.

Causas comunes

  • An error occurred on the switching of systems incorporating SIL2 Process CPUs, causing an extended HOLD state.
  • An error occurred in communications with a SIL2 Process CPU, leading to the prolonged I/O HOLD condition.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check all components and logic involved in the switching of systems that utilize SIL2 Process CPUs for any errors.

  2. 2

    Verify the integrity and functionality of communication links and protocols with the SIL2 Process CPU for any detected errors.

Ver todos los códigos en este manual (56)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

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