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132 T1-16S 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) ≥ set value (A)
ON
Operand
Name Device Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
A Set value
√√√√√√√√√√
0 - 65535
B Count value
√
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
3
2
5
4
3
2
11