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401
Drive Ready Signal (DRDY) Lost
Fanuc · Alpha i series AC Servo Motor
¿Qué significa 401 ?
The DRDY (Drive Ready) signal has transitioned to 0, indicating that the servo amplifier is not in a ready state. This often occurs during initial power-up or after a fault, preventing motor operation.
Causas comunes
- Servo amplifier internal readiness conditions not met.
- Initial power-up sequence not completed or interrupted.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Cycle power to the servo amplifier.
- 2
Verify power supply stability and input voltage levels for the servo amplifier.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: Fanuc Alpha i series AC Servo Motor