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
Correct the hardware DIP switch settings according to the equipment documentation
- 2
Verify that the parameter settings in the software align with the physical DIP switch positions
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H