Mitsubishi Electric · MELSEC Q-series MELSECNET/H
A communication timeout occurred, meaning a response was not received within the expected timeframe. This is a common network issue that can stem from various physical and logical problems.
Click steps to track your progress.
Inspect network cables for physical damage or incorrect wiring
Check for sources of electrical noise that may interfere with communication
Verify the correct installation and presence of terminating resistors, especially in bus configurations
Confirm that all station numbers are unique across the network
Verify that control station or remote master station settings are not duplicated
Check for faulty network hardware