SP0221

Spindle/Motor Number Mismatch (15i)

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

What does SP0221 mean?

The correspondence between spindle numbers and motor numbers for Series 15i is incorrect. This can lead to the wrong motor being controlled or general system malfunction.

Common Causes

  • The assigned motor number for a given spindle does not match the hardware connected.
  • Incorrect parameter setting for spindle-to-motor mapping.
  • A physical motor has been replaced without updating the corresponding spindle configuration.
  • The system is attempting to control a spindle with an unassigned or incorrect motor.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify parameter P1-05 (Motor Number) for the affected spindle is correctly set.

  2. 2

    Confirm the physical motor's identification plate matches the configured motor number.

  3. 3

    Physically trace the motor cable to ensure it connects to the expected drive.

  4. 4

    Reset the spindle configuration and re-assign motor numbers.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Fanuc AC Spindle Motor Alpha i-Beta i Series Parameters
Fanuc Error SP0221: Spindle/Motor Number Mismatch (15i) — Troubleshooting Guide | ErrorLib