453

SPC SOFT DISCONNECT ALARM

Fanuc · Series 30i/31i/32i-MODEL B Plus

What does 453 mean?

This alarm indicates a position-pole data error, often caused by Pulse coder failure or the entry of cutting fluid. Such an error suggests a problem with the fundamental position feedback mechanism.

Common Causes

  • Position-pole data error
  • Pulse coder failure
  • Entry of cutting fluid into the Pulse coder

Repair Steps

  1. 1

    Replace the Pulsecoder.

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Verified technical data. Last updated: March 2026
Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Fanuc Error 453: SPC SOFT DISCONNECT ALARM — Troubleshooting Guide | ErrorLib