SP0220

Serial Spindle Amplifier Disconnected (15i)

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

What does SP0220 mean?

The cable connected to the serial spindle amplifier for Series 15i is disconnected, or no serial spindle amplifier is connected. This prevents communication and control of the spindle.

Common Causes

  • Serial spindle amplifier disconnected or not communicating (15i).
  • Loss of communication with the spindle drive.
  • Spindle amplifier not powered or faulty.
  • Wiring problem on the serial communication link to the spindle amplifier.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the serial communication cable connection between the CNC and the spindle amplifier.

  2. 2

    Confirm that a serial spindle amplifier is physically connected to the system for Series 15i.

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Verified technical data. Last updated: March 2026

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