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SP0987

SIC-LSI Faulty (CNC Side, 15i)

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

Was bedeutet SP0987 ?

The SIC-LSI (Serial Interface Converter-LSI) on the CNC side for Series 15i is faulty. This indicates a hardware error on the CNC's serial communication interface.

Häufige Ursachen

  • Faulty Serial Interface Converter-LSI chip on the CNC side.
  • Damaged CNC serial communication port.
  • Software issue within the CNC's serial communication driver.
  • Power supply instability affecting the CNC's SIC-LSI.
  • Interference on the CNC's internal bus affecting SIC-LSI data.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Measure the 5V supply voltage to the SIC-LSI on the CNC control board.

  2. 2

    Inspect the CNC's serial communication connector for bent pins or contamination.

  3. 3

    Run CNC diagnostics for serial communication interfaces.

  4. 4

    Verify the correct driver is loaded for the serial communication hardware.

  5. 5

    Isolate the CNC from other network devices and re-test communication.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

Verwandte Fehlercodes

Quelle: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters
Fanuc SP0987 SIC-LSI Faulty (CNC Side, 15i): Fehleranalyse… | ErrorLib