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SRVO-074

LDAL alarm (Pulsecoder LED Broken)

Fanuc · R-30iB Mate + Mate Plus Robot

¿Qué significa SRVO-074 ?

This alarm (Group:i Axis:j) signifies that the LED within the Pulsecoder is broken or faulty. This prevents the Pulsecoder from generating proper position feedback, directly affecting axis control and potentially leading to inaccurate positioning or uncontrolled motion.

Causas comunes

  • Pulsecoder LED (LDAL - LED Abnormality) has failed or is not emitting light.
  • Optical feedback path within the pulsecoder is obstructed or broken.
  • Dirty or damaged encoder disk or sensing surface.
  • Faulty LED driver circuit within the pulsecoder.
  • Pulsecoder internal diagnostics detecting LED failure.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Replace the Pulsecoder for the affected axis.

  2. 2

    Remaster the robot after Pulsecoder replacement to re-establish absolute position.

Ver todos los códigos en este manual (53)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Fanuc R-30iB Mate + Mate Plus Robot