Omron NT31 NT31C manual Checking Communication at Serial Ports, Check Screen, For Host Link

System Maintenance Section 6-11

Checking

Communication at Serial

Ports

After confirming the result of the test, press Quit. The NT31/NT31C returns to the I/F CHECK MENU screen.

Check communication at the serial ports (A, B).

Check Screen

The check screen and check method differ according to the communication method set for the port to be checked.

For Host Link

Example: Serial port A while using the host link

Press Execute to start the check. The data for checking communication is sent to the host, and is displayed as the Sending Data in hexadecimal.

•If communication with the host is normal, the reply from the host is displayed at Received Data in hexadecimal.

•If a communication error occurs while checking the communication conditions with the host, a communication error screen is displayed. Since this indicates that there is a communication fault, check the communication cables and set- tings.

For NT Link (1:1 or 1:N)

Example: Serial port B while using the NT Link (1:N)

Press Execute to start the check. The data for checking communication is sent to the host, and is displayed as ∗∗ symbols at Sending Data.

•If communication with the host is normal, the reply from the host is displayed at Received Data as ∗∗ symbols.

•If a communication error occurs while checking the communication conditions with the host, a communication error screen is displayed. Since this indicates that there is a communication fault, check the communication cables and set- tings.

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