Omron Programmable Terminals NT631 Setup Manual page 228

System Maintenance
For NT Link (1:1, 1:N Standard, or 1:N High-speed)
Example: Serial port B while using the NT Link (1:N)
Press Execute to start the check. The data for checking communications is
sent to the host, and is displayed as ∗∗ symbols at Sending Data.
• If communications with the host are normal, the reply from the host is dis-
played at Received Data as ∗∗ symbols.
• If a communications error occurs while checking the communications con-
ditions with the host, a communications error screen is displayed. Since
this indicates that there is a communications fault, check the communica-
tions cables and settings.
For Memory Link
Example: Serial port A while using the memory link
The check is started as soon as the check screen is displayed. Send the com-
mand from the host.
• If communications with the host are normal, the data received from the
host is displayed in hexadecimal text code at Received Data.
• If nothing is displayed at Received Data when the command is sent from
the host, there is a communications fault: check the communications
cables and settings.
For a Bar Code Reader
The check starts when the check screen is displayed. Read data with the bar
code reader in this status.
• If communications with the bar code reader are normal, the read charac-
ter strings are displayed in hexadecimal text code at Received Data.
Section 6-11
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