F804

DIP Switch Error

Mitsubishi Electric · MELSEC Q-series MELSECNET/H

What does F804 mean?

An error related to the DIP switch settings has occurred, indicating a mismatch between the hardware configuration and expected or programmed settings.

Common Causes

  • Incorrect physical position of one or more DIP switches
  • Discrepancy between DIP switch settings and corresponding parameter settings

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Correct the hardware DIP switch settings according to the equipment documentation

  2. 2

    Verify that the parameter settings in the software align with the physical DIP switch positions

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

Related Faults

Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H