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Checking Network Function on the Main Controller
Perform checking by the loopback address.
1) Select the following: [Additional Functions] > [Configuration] > [Network] > [TCP/IP Setting] > [IPv4 setting] > [Ping Command]; and enter the IP address, "127.0.0.1" with the numeric keypad and enter Execute key.
The network function of the Main Controller is working properly if the message say "Response from the host".
If the message say "No response from the host", the network function of the Main Controller is faulty.
2) Replace with a Main Controller that works properly, and then check connection.