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Alarm 2

Software Disconnection (Closed Loop)

Fanuc · Alpha i Series Servo Amplifier

¿Qué significa Alarm 2 ?

This alarm is issued when the change in position feedback pulses is relatively small for the change in velocity feedback pulses. This condition typically occurs in a closed-loop system and is not issued with the semi-closed loop.

Causas comunes

  • The closed-loop control system has lost its feedback signal.
  • Software error preventing the system from establishing a closed loop.
  • Encoder or sensor is not providing valid position data.
  • Communication failure with the position feedback device.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check whether the separate detector outputs position feedback pulses correctly.

  2. 2

    If the detector outputs pulses correctly, investigate for a large backlash between the motor position and scale position causing reverse rotation of only the motor at the start of machine operation.

Ver todos los códigos en este manual (101)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Fanuc Alpha i Series Servo Amplifier