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SP0978

Serial Spindle Amplifier Communication Timeout (15i)

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

Was bedeutet SP0978 ?

A time-out was detected in communication with a serial spindle amplifier for Series 15i. This indicates a delay or failure in receiving a response from the amplifier within the expected timeframe.

Häufige Ursachen

  • Loss of serial communication with the spindle amplifier.
  • High network traffic interfering with timely data packets.
  • Excessive processing load on the CNC preventing timely responses.
  • Incorrect serial communication parameters set in P1-54.
  • Physical damage to the serial communication cable or connectors.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Verify the presence of data activity on the serial communication bus using an oscilloscope.

  2. 2

    Set parameter P1-54 to the correct baud rate and protocol settings for the amplifier.

  3. 3

    Power cycle the spindle amplifier and the CNC.

  4. 4

    Inspect the serial cable for physical damage and ensure secure connections at both ends.

  5. 5

    Measure the voltage at the serial communication terminals (e.g., T+, T-, R+, R-) on the CNC side.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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