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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.

F800

Mode Switch Error

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

What does F800 mean?

An error related to the mode switch setting has occurred, likely indicating a hardware configuration mismatch or an invalid mode selection.

Common Causes

  • Incorrect physical position of a hardware mode switch
  • Invalid parameter setting for the operational mode

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the physical position of any mode switches on the hardware

  2. 2

    Check the parameter settings related to the operational mode for correctness

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

F105Initial Status with Baton/Data Link IssueF106Control/Sub-control Station Shift StatusF107Baton Pass Error (Baton Lost)
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H
Open Manual (Page 162)Search more codes in this manual