CPU_FROM_SOFTWARE_INCOMPLETE_LOADING

CPU FROM Software Incomplete Loading

Fanuc · Alpha i series AC Servo Motor

What does CPU_FROM_SOFTWARE_INCOMPLETE_LOADING mean?

Loading of a software on the FROM (Flash Read-Only Memory) built into the CPU is incomplete. This can also indicate an error in the internal RAM write/read test at power-up or a general control circuit error, preventing proper system initialization.

Common Causes

  • Incomplete software loading on the CPU's FROM
  • Error detected in internal RAM write/read test at power-up
  • Error detected in the control circuit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn the power off, then back on

  2. 2

    If this alarm recurs, replace the servo amplifier module

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Verified technical data. Last updated: March 2026

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Source: Fanuc Alpha i series AC Servo Motor