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: March 2026

Related Faults

Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H