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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

P

Communication error between amplifiers

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

What does P mean?

A communication error has occurred between various amplifiers. This issue is typically caused by a defective connector or cable (CXA2A/B) used for inter-amplifier communication, or an internal failure within the Servo Amplifier. This error prevents proper control signal exchange.

Common Causes

  • Connector/cable (CXA2A/B) defective
  • Servo Amplifier failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the integrity and ensure secure connection of connector CXA2A/B between the amplifiers.

  2. 2

    If the connector and cable are confirmed to be in good condition, replace the Servo Amplifier.

Browse all codes in this manual (38)
Verified technical data. Last updated: April 2026

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Source: Fanuc Series 30i/31i/32i-MODEL B Plus
Open Manual (Page 92)Search more codes in this manual