SV0382

COUNT MISS(EXT)

Fanuc · Alpha i Series Servo Amplifier

What does SV0382 mean?

A count error occurred on the separate detector, indicating that pulses were missed during counting. This directly affects the accuracy of position tracking by the external detector.

Common Causes

  • External detector is operating at speeds exceeding its counting capacity.
  • Vibration causing intermittent loss of external detector signal lock.
  • External detector internal logic circuit failure.
  • Data transmission corruption impacting pulse counts from external detector.
  • Mechanical backlash or slippage in the driven system.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reduce the velocity command to the servo.

  2. 2

    Securely mount the external detector and associated components.

  3. 3

    Test external detector pulse counting against a known reference.

  4. 4

    Ensure clean signal transmission for the external detector.

  5. 5

    Inspect mechanical linkages for play or excessive slack.

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Verified technical data. Last updated: March 2026

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Source: Fanuc Alpha i Series Servo Amplifier