Mitsubishi Melsec-Q Series User Manual page 342

(From previous page)
Do PING replies return
between each pair of nodes on the
same network?
YES
Replace the hub, router, or
cables to check for
communication.
Error detection
Hardware fault
Please consult your local nearest
Mitsubishi or representative,
explaining a detailed description of
the problem.
12 - 47
Check the cables and hub in the
NO
network to ensure normal
communication route.
Is Ethernet
NO
communication available with
the target device?
Normal operation
YES
Completed