EL
ErrorLib
Brands
||
  1. Home
  2. Mitsubishi Electric
  3. MELSEC iQ-R Motion Controller
  4. A00
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.

A00

Operating System Software Not Installed

Mitsubishi Electric · MELSEC iQ-R Motion Controller

What does A00 mean?

This fault indicates that the operating system software required for the Motion CPU module is not installed. The module is in an uninitialized state, presenting as installation mode.

Common Causes

  • Operating system software missing from the Motion CPU module

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Put the Motion CPU module in installation mode.

  2. 2

    Install the operating system software using MT Developer2.

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