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

  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.

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Verified technical data. Last updated: March 2026
Source: Fanuc Series 30i/31i/32i-MODEL B Plus