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08

Regeneration Excess Alarm

Fanuc · Alpha i Series AC Servo Motor and Spindle

¿Qué significa 08 ?

This alarm may be generated in the αi PSR when the spindle decelerates, particularly if a regenerative discharge unit with a resistance of 16Ω is used with a spindle motor having a maximum output of 5 kW or more. This indicates that the unit is not effectively dissipating regenerative energy.

Causas comunes

  • Excessive regenerative energy during deceleration exceeds system limits.
  • Regenerative braking torque too high for controller's capacity.
  • Parameter settings for regeneration threshold (e.g., P3-01) are too low.
  • Faulty regenerative braking resistor system unable to dissipate excess energy.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Verify the maximum output of the spindle motor. If it is 5 kW or more, proceed to the next step.

  2. 2

    Check the resistance of the installed regenerative discharge unit. If it is 16Ω, replace it with an 8Ω regenerative discharge unit.

Ver todos los códigos en este manual (29)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Fanuc Alpha i Series AC Servo Motor and Spindle