Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 152)

Caution
Correct use

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Section 4-7
5-7 Touch Switches
The NT600S has a function whereby input operations can be performed by using
touch panels displayed on the screen. NT600S screens can be switched, or bit
information sent to the PC, by pressing (lightly touching) the “touch switches” in a
panel.
The touch switches can also be made to light up (or flash) and go off like lamps.
Touch switches are set when creating the screen data with the support tool.
This section describes the touch switches that can be displayed, and explains the
screen switching function and the system key function.
For details on how the status of the currently displayed touch switch is notified to
the Host, refer to “Lit (Flashing) and Unlit Touch Switch Statuses (Changing the
Status of Allocated Bits)” on page 185, “Lamp and Touch Switch Display (Bit Spec-
ification)” on page 211, and “Lamp and Touch Switch display (Number Specifica-
tion)” on page 212.
For details on how the statuses of touch switches are ascertained by the Host, re-
fer to “Notifying the Host that a Switch has been Pressed (Determining Touch
Switch Status)” on page 185, and “Lamp and Touch Switch Display Status Enqui-
ry” on page 212.

Do not use input functions such as PT touch switches for applications where
danger to human life or serious damage is possible, or for emergency switch
applications.

Press touch switches with a force of no greater than 20 N.
Applying higher force may cause glass to break, cause injuries, and prevent op-
eration.

Do not press touch switches carelessly while the backlight is off or while nothing
is displayed on the screen.
Otherwise the system may operate unpredictably.
Only press touch switches after confirming system safety.
If touch switches are pressed in rapid succession, their inputs may not be suc-
cessfully received.
Confirm that the input of a touch switch has been successfully received before
moving on to the next operation.