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291
External Pulse Axial Speed Exceeded
Fanuc · Alpha i series AC Servo Motor
¿Qué significa 291 ?
The speed of an axial movement specified by an external pulse has exceeded its upper limit. This alarm is active only when the EPEXA bit of parameter No.001 is set to 1, indicating an overspeed condition from external command.
Causas comunes
- Axial movement speed commanded by an external pulse exceeds the configured upper limit.
- Incorrect magnification of the external pulse (parameters No.062 and No.063) leading to excessive commanded speed.
- EPEXA bit of parameter No.001 is set to 1, enabling this speed limit check.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Check the speed value being specified by the external pulse signal.
- 2
Verify the magnification settings of the external pulse using parameters No.062 and No.063.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: Fanuc Alpha i series AC Servo Motor