Omron NT20S, Operation Manual

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Lamps, Touch Switches, Numeral Setting Section 5-3
Depending on the set operation type, the status of the allocated bit for touch switch
status notification will be controlled in one of the following ways (unless Ver.4 direct
connection is used, in which case the setting is fixed as “momentary”):
Momentary : 0 (OFF) ... Not pressed
:1 (ON) ... Pressed
Alternate : The allocated bit is switched to 1 (ON) if currently 0, and to 0
(OFF) if currently 1.
Set : The allocated notify bit is forcibly switched to 1 (ON).
Reset : The allocated notify bit is forcibly switched to 0 (OFF).
In order to determine the status of a touch switch, the status of the touch switch
notification bit allocated to it is determined.
The touch switch notify bits can be allocated to the following areas of the PC
memory.
Symbol C Series PCs Allocated CVM1/CV Series PCs Allocated
DM Data Memory
f
Data Memory
f
CH Internal/Special Relay
f
Internal/Special Relay
f
TIM Timer Timer
CNT Counter Counter
HR Holding Relay
f
–
AR Auxiliary Relay
f
Auxiliary Relay
LR Link Relay
f
–
f
: OK : NG
Since all the CVM1/CV-series special auxiliary relays are allocated to the system,
they cannot be used for applications not related to the system.
The range of each memory area differs according to the PC type. See “Appendix L
PC Memory Map” (page 278 of the APPENDICES) for more details.
When making a data memory (DM) specification, specify the bit number (00 to 15)
following the word number.
Procedure 1. Use the support tool to allocate the touch switch notify bits to the PC memory.
2. When creating the screen data using the support tool, register the touch switch
for a screen.
3. Create a PC program to determine whether the touch switch notify bit is ON or
OFF.