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300

Request for Reference Position Return

Fanuc · Series 20 CNC

¿Qué significa 300 ?

This alarm typically indicates that an operation requiring the machine to be at its reference (home) position was initiated before the reference return cycle was completed. It serves as a reminder or pre-alarm that homing is required.

Causas comunes

  • Attempting to run an automatic program or move an axis in absolute coordinates before homing.
  • Power cycling the machine without re-establishing reference positions.
  • Machine parameters requiring explicit homing after certain events.
  • Loss of absolute position data due to battery failure or encoder issues (leading to a need for homing).

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Perform the reference position return (homing) procedure for all axes as per the machine's operational manual.

  2. 2

    Verify that the machine's battery for absolute encoders is healthy if the machine requires homing after every power cycle.

  3. 3

    Check if any recent parameter changes might have disabled automatic homing or altered homing requirements.

  4. 4

    Confirm that the absolute position data is retained after power off; if not, investigate the battery backup system or absolute encoder.

  5. 5

    Ensure the machine's control mode is set correctly for homing operation.

Ver todos los códigos en este manual (43)
Datos técnicos verificados. Última actualización: March 2026

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