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SP1985

SIC-LSI Faulty (CNC Side, 30i Range)

Fanuc · AC Spindle Motor Alpha i-Beta i Series Parameters

¿Qué significa SP1985 ?

The SIC-LSI (Serial Interface Converter-LSI) on the CNC side for Series 30i (codes SP1985 to SP1987) is faulty. This indicates a hardware error on the CNC's serial communication interface.

Causas comunes

  • Malfunctioning SIC-LSI component on the CNC interface board (30i range).
  • Defective data lines between the CNC processor and the SIC-LSI.
  • Firmware corruption on the CNC's serial interface controller.
  • Overheating of the CNC control unit affecting the SIC-LSI.
  • Electrical noise on the CNC's internal bus impacting SIC-LSI operation.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Check the regulated voltage supplied to the SIC-LSI on the CNC board.

  2. 2

    Use an oscilloscope to monitor the clock and data signals on the SIC-LSI interface.

  3. 3

    Perform a system-level diagnostic test on the CNC controller.

  4. 4

    Ensure proper grounding of the CNC cabinet.

  5. 5

    Attempt to update the CNC system software to the latest stable version.

Ver todos los códigos en este manual (60)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters