Functions Of Touch Switches - Omron NT-series Operation Manual

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Reference
5-7-1

Functions of Touch Switches


Caution on pressing touch switches at 3 points
When multiple touch switches are created at the relative positions indicated in
the example below, malfunctions may occur due to the characteristics of this
switch configuration.
Be careful about the positioning when setting touch switches.
Example 1 :When switches are created at positions A and B and at the points
where the vertical and horizontal lines extending from these two points inter-
sect, i.e. points C and D:
A
D
Smallest touch switch frame
Touch switches are created using rectangular elements measuring 39 dots hori-
zontally by 49 dots vertically. A touch switch can comprise more than one touch
switch element. Up to 128 touch switches (16 horizontally x 8 vertically) can be
registered on one screen.
PC
When the touch switch is
pressed, bit information
is sent to the PC.
(NT link/Host link/
C200H direct)

When switches A, B, and C are switched
on at the same time, switch D is also
C assumed to have been switched on due to
the configuration of the touch switches.

When switches A, B, and D are switched
B
on at the same time, switch C is also
assumed to have been switched on due to
the configuration of the touch switches.
STOP
Host
When the touch switch is pressed,
the touch switch number or bit
information is sent to the Host.
(RS-232C)
Section 4-7
39 dots
49 dots
A touch switch can comprise more
than one touch switch element.