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SV0477

ILLEGAL MACHINE POS.(SV)

Fanuc · Alpha i Series Servo Amplifier

¿Qué significa SV0477 ?

The servo detected that the machine position on the axis is not within the safety area (parameter No.13831 to 13838) during safety monitoring (when the safety check request signal (*VLDVx) is 0). This indicates the axis moved outside its defined safe operating envelope after the machine reference position was established, which can lead to collisions or unsafe conditions.

Causas comunes

  • Machine reached an unexpected position due to external forces or incorrect command.
  • Axis limit switch triggered unexpectedly during movement.
  • Following error too large, exceeding P1-54.
  • Incorrect homing sequence or lost position reference.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Confirm that parameters No.13831 to 13838 define the correct safety area for the machine.

  2. 2

    Verify that the axis operation program ensures movement is performed within the established safety area.

  3. 3

    Ensure the machine reference position has been correctly established for the affected axis.

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