F803
Group Number Error / Station Number Error
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F803 mean?
A group number or station number error has been detected, typically due to incorrect hardware setting switches or parameter configurations. This prevents proper addressing on the network.
Common Causes
- Incorrect hardware setting switch (e.g., DIP switch) configuration for group or station number
- Incorrect group number or station number specified in parameters
Repair Steps & Checklist
Click steps to track your progress.
- 1
Correct the physical hardware setting switch positions (e.g., DIP switches) related to group or station numbers
- 2
Verify and correct the parameter settings for group or station numbers
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H