EL
ErrorLib
Brands
||
  1. Home
  2. Mitsubishi Electric
  3. MELSEC iQ-R Motion Controller
  4. A01
About·Privacy·Terms

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.

A01

Operating System Software File Error

Mitsubishi Electric · MELSEC iQ-R Motion Controller

What does A01 mean?

This fault indicates an error within the installed operating system software file on the Motion CPU module. The corrupted file prevents the operating system from functioning correctly, leading to operational issues.

Common Causes

  • Corrupted operating system software file installed on the Motion CPU module

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Reinstall the operating system software.

Browse all codes in this manual (19)
Verified technical data. Last updated: April 2026

Related Faults

0BD2HSynchronous Encoder Axis Speed Monitor Range Exceeded19EAHCommand Generation Axis Length Per Cycle Invalid1A31HCommand Generation Axis Positioning Address Out of Range
Source: Mitsubishi Electric MELSEC iQ-R Motion Controller
Open Manual (Page 73)Search more codes in this manual