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T1/T1S User’s Manual
7. Instructions
CNT Counter
Expression
Count input
C
CNT
Q
Output
Enable input
E
A
B
Function
While the enable input is ON, this instruction counts the number of the count input changes from OFF
to ON. The count value is stored in the counter register
B
. When the count value reaches the set value
A
, the output and the counter device corresponding to
B
are turned ON. When the enable input comes
OFF,
B
is cleared to 0 and the output and the counter device are turned OFF.
The available data range for operand
A
is 0 to 65535.
Execution condition
Enable
input
Operation Output
OFF No operation (
B
is cleared to 0) OFF
ON
Count value (
B
)
<
set value (
A
)
OFF
Count value (
B
)
³
set value (
A
)
ON
Operand
Name Device Re
g
ister Constant Index
X Y R S T. C. XW YW RW SW T C D I J K
A
Set value
ÖÖÖÖÖÖÖÖÖÖ
0 - 65535
B
Count value
Ö
Example
X001
X002
C010
C.010
Y021
Note
·
No transitional contact is required for the
count input. The count input rising edge is
detected by this instruction.
·
For the count input, direct linking to a
connecting point is not allowed. In this
case, insert a dummy contact (always ON =
S04F, etc.) just before the input.
Refer to Note of Shift register FUN 074.
·
Multiple counter instructions (CNT) with the
same counter re
g
ister are not allowed.
3
2
5
4
3
2
11
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