SV0361

ABNORMAL PHASE DATA(INT)

Fanuc · Alpha i Series Servo Amplifier

What does SV0361 mean?

An abnormal phase data alarm occurred on the built-in Pulsecoder. This suggests an issue with the phase signal generation or detection within the Pulsecoder.

Common Causes

  • Abnormal signals from the Pulsecoder's phase generation circuit.
  • Internal misalignment of Pulsecoder components.
  • Damage to the Pulsecoder's optical or magnetic sensor.
  • External magnetic fields affecting phase detection.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect Pulsecoder for signs of impact or contamination.

  2. 2

    Measure phase signals (e.g., A, B) from the Pulsecoder for proper timing.

  3. 3

    Check for presence of strong magnetic fields near the encoder.

  4. 4

    If accessible, clean Pulsecoder sensor surfaces.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Fanuc Alpha i Series Servo Amplifier