Omron NT31 Operation Manuals page 221

Section 6-10
Setting the Bar Code Reader Input Function
Select "Memory Switch".
Press [ ] (next screen) or [ ] (previous
screen) to display the fourth memory switch
setting screen.
Press "Comm. A Method" to select "Bar-Code
Reader".
The setting option changes each time the
touch switch is pressed.
Press the "Set" touch switch to the right of
"Comm. A Method".
Display the required setting for each item by
pressing the touch switches.
The setting option changes each time the
touch switch is pressed.
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