Omron NT20S Operation Manual page 204

Lamps, Touch Switches, Numeral Setting
The touch switch notification operations are as follows:
Type of Notification
Operation
(1)Notification in word units
Momentary
(2)Notification in word units
Alternate
Set
Reset
When using touch switch input notification, note the following points:
- In the case of (1), the other bits in the same word as the notification bit are turned
OFF by the notification operation.
15 14
Bit
0 1
- In the case of (2), notification is executed on the basis of the contents of the word
before display, which means that the other bits are not rewritten. However, if the
word contents are changed at the PC side, they will be rewritten based on the
contents before display.
- If the screen is switched while a momentary key is being pressed, the touch
switch itself disappears, so the status "OFF" is notified. In the case of (1) this
means that the other bits in the word will also be turned OFF.
- When using the host link, or NT link with the DM area, do not allocate momentary
touch switches and other types of touch switch to the same word, since the notifi-
cation operations are different.
In the case of (3) and (4), the notification operation has no influence on the other
bits in the word.
When Using Host Link or
NT Link with DM Area
(other bits go OFF)
(however, the word contents
are read on display and noti-
fication is based on this
reading)
Press the
touch switch
1 0
0 1
Touch switch
notify bit
Section 5-3
When Using C200H Direct
Communication or NT Link with
other than DM Area
(3)Notification in bit units
(4)Notification in bit units
15 14
Bit
0 0
Bits other than notify
bits are set to 0 (OFF).
1 0
1 0
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