Mitsubishi Electric · MELSEC Q-series MELSECNET/H
The system has attempted to send data multiple times but consistently failed, exceeding the allowed number of retries. This indicates a persistent communication issue on the sending end.
Click steps to track your progress.
Inspect network cables for physical faults or incorrect wiring
Verify the presence and correct installation of terminating resistors on the bus network
Check for sources of electrical noise near network cabling
Verify station numbers and control/remote master station settings for any duplication
Check for faulty network hardware at the sending station