F11A
Send Failure (Multiplex Loop Transmission Stopped)
Mitsubishi Electric · MELSEC Q-series MELSECNET/H
What does F11A mean?
A send failure occurred because multiplex loop transmission has stopped. This indicates a problem within the loop network that is preventing data from being sent.
Common Causes
- Interruption or stoppage of multiplex loop transmission
- Underlying network communication issues
Repair Steps & Checklist
Click steps to track your progress.
- 1
Attempt to retry the send operation after a short interval
- 2
If the error persists, investigate the multiplex loop network status for underlying faults
Verified technical data. Last updated: March 2026
Related Faults
Source: Mitsubishi Electric MELSEC Q-series MELSECNET/H