Omron NT20S Operation Manual page 119

System Maintenance
Reference: If memory switch setting for the key press sound has been made for ON, the key
Checking the Communications with the Support Tool
100
A panel of 6-row x 12-column touch switches, each switch sized 1 x 1 cm, will be
displayed.
S Press a touch switch on the screen. If the touch switch is highlighted while it is
pressed, the touch switch is normally functioning.
S When the check is finished, press the EXIT touch switch. The I/O check menu
will be redisplayed.
press sound will be made when a touch switch is pressed.
The statuses of touch switches pressed during an I/O check are not notified to the
host.
Execute a NT20S-to-support tool communication check by the menu operation
from the System Menu as mentioned below.
The NT20S-ST121-EV3/ST128 uses the same connector for connection to the
support tool and connection to the Host. If this connector is currently connected to
the host, disconnect the cable from it and connect it to the support tool (personal
computer) before attempting screen data transmission.
[ SYSTEM MENU ]
Quit
Transmit Mode
Maintenance Mode
[ MAINTENANCE MENU ]
Quit
PT Setting
I/O Check
Init. Memory
Memory Switch
"EXIT" switch to exit the
touch switch check menu.
The touch switch is normal if it is
highlighted while it is pressed.
DIP-SW Status
Section 3-9
Select "Maintenance Mode".
Select "I/O Check".