Omron SYSMAC CP Series Instruction & Reference Manual page 118

2 Instructions
• When a CNT/CNTX(546) counter is forced set, its Completion Flag will be turned ON and its PV will
be reset to 0000. When a CNT/CNTX(546) counter is forced reset, its Completion Flag will be turned
OFF and its PV will be set to the SV.
• Be sure to reset the counter by turning the reset input from OFF → ON → OFF before beginning
counting with the count input, as shown in the following diagram. The count input will not be received
if the reset input is ON.
• The reset input will take precedence and the counter will be reset if the reset input and count input
are both ON at the same time. (The PV will be reset to the SV and the Completion Flag will be turned
OFF.)
• If online editing is used to add a counter, the counter must be reset before it will work properly. If the
counter is not reset, the previous value will be used as the counter's present value (PV), and the
counter may not operate properly after it is written.
2-82
ON
Reset input
OFF
ON
Count input
OFF
SV
Counter PV
0
ON
Completion
Flag
OFF
Ready to start
counting
ON
Reset input
OFF
ON ON ON
Count input
OFF OFF OFF
SV
Counter PV
0
ON
Completion
Flag
OFF
Count input Reset input
can be takes
received. precedence.
Count input
can be
received.
CP1E CPU Unit Instructions Reference Manual(W483)