Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 279

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• The counter PV is decremented by 1 every

time that the count input goes from OFF to

ON. The Completion Flag is turned ON

when the PV reaches 0.

• Once the Completion Flag is turned ON,

reset the counter by turning the reset input

ON or by using the CNR(545)/CNRX(547)

instruction. Otherwise, the counter cannot

be restarted.

• The counter is reset and the count input is

ignored when the reset input is ON. (When

a counter is reset, its PV is reset to the SV

and the Completion Flag is turned OFF.)

• The setting range 0 to 9,999 for CNT and 0 to 65,535 for CNTX(546).

• Counter PVs are retained even through a

power interruption. If you want to restart

counting from the SV instead of resuming

the count from the retained PV, add the

First Cycle Flag (A200.11) as a reset input

to the counter.

• Counter numbers are shared by the CNT, CNTX(546), CNTR(012), CNTRX(548), CNTW(814), and

CNTWX(818) instructions. If two counters share the same counter number but are not used

simultaneously, a duplication error will be generated when the program is checked but the counters

will operate normally. Counters which share the same counter number will not operate properly if they

are used simultaneously.

• A counter's PV is refreshed when the count input goes from OFF to ON and the Completion Flag is

refreshed each time that CNT/CNTX(546) is executed. The Completion Flag is turned ON if the PV is

0 and it is turned OFF if the PV is not 0.

CS/CJ/NSJ Series Instructions Reference Manual (W474)

First Cycle Flag

3. Instructions

Chapters

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