4 Basic Instructions
DVP-PM Application Manual
4-8
Remarks:
See the specification of DVP-PM for the range of operand T.
Mnemonic Function
CNT
16-bit Counter
Controllers
20PM 10PM
C-K C0 ~ C199, K0 ~ K32,767
Operand
C-D C0 ~ C199, D0 ~ D9999
Explanations:
1. When CNT instruction goes from OFF to ON, the designated counter coil will be driven, and the present value in
the counter will plus 1. When the counting reaches the set value (present value = set value), the associated
contact will be ON and act as follows:
NO (normally open) contact Current flows
NC (normally closed) contact Current blocked
2. If there are other counting pulse inputs after the counting reaches its target, the contact and present value will
stay intact. Use RST instruction to restart or reset the counting.
Program Example:
Ladder diagram: Instruction: Operation:
LD X0 Load NO contact X0
X0
C20CNT
K100
CNT C20 K100
Set value in counter C20 as K100
Mnemonic Function
DCNT
32-bit Counter
Controllers
20PM 10PM
C-K C200, C204, C208 ~ C255, K-2,147,483,648 ~ K2,147,483,647
Operand
C-D C200, C204, C208 ~ C255, D0 ~ D9999
Explanations:
1. DCNT is the instruction for enabling the 32-bit counters C200 ~ C255.
2. For general count-up / count-down counters C200 ~ C255, when DCNT instruction goes from OFF to ON, the
present value in the counter will plus 1 (counting up) or minus 1 (counting down) according to the modes set by
M1200 ~ M1234.
Program Example:
Ladder diagram: Instruction: Operation:
LD M0 Load NO contact M0
M0
C254DCNT
K1000
DCNT C254 K1,000
Set value in counter C254 as K1,000
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