Check the send and receive lines for RS-232C, RS-422 and network communication. Use this check when an error occurs.
When checking RS-232C and RS-422, you need to connect the SIO cable. When the operation is normal, [OK] is displayed. When there is a problem, an error message is displayed.
For GP-4100 series, there is no switch to select a terminal or mode.
Checking the COM port is not available in GP-4107 and AST-3211A (MPI) units.
Check whether the display unit's COM2 interface is operating properly.
Runs internal loopback check. Runs a MAC address check.
This item is not displayed when the GP does not have a LAN interface.
To check the COM1 and COM2 ports, preparation of a loopback cable is required. For details, see the following.
M.8.3 Check COM1/COM2/LAN