F7C9
Resend Count Out of Range
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F7C9 mean?
The configured resend count for communication attempts is outside its permissible setting range. This prevents proper retry logic for failed transmissions.
Common Causes
- Resend count is set to a value outside the valid range of 0 to 15 times
Repair Steps & Checklist
Click steps to track your progress.
- 1
Set the resend count parameter to a value within the range of 0 to 15 times
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H