Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 155)

Reference

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Section 4-7
5-7-2 Standalone Function
The NT600S has a function that allows screens to be switched by pressing touch
switches on its screen, rather than by designation from the PC. This function is
called the “standalone function”.
The screen number of the screen that will be displayed when a touch switch is
pressed is set for that touch switch when the screen data is created using the sup-
port tool.
If the touch switch is pressed during operation, the screen whose number was
designated will be displayed. Simultaneously, the PC will be notified of the screen
number of the screen selected for display.
“Screen #5” set for touch switch #1
To next screen
Touch switch
pressed once
Screen #5
 To set a screen number for a touch switch, use “Touch SW”, “Bit specification”
and “Screen switch” of the support tool.

Only one screen number can be set for one touch switch within one screen (or
within one overlapping screen).