FATEK FBs-4A2D - Page 132

Basic Function Instruction
6-7
C
COUNTER
（16-Bit: C0～C199, 32-Bit: C200～C255）
C
Ladder diagram Key operations Mnemonic code
X1
CLR
CK
X0
C200
C200
R 0
PV :
CLR
Y1
An example of applying
the “time-up” status by
using the C200 contact.
ORG
OUT
LD
ORG
ORG X 0
LD
X 1
C200
PV: R 0
ORG C 200
OUT Y 1
c
d
X0
X1
C200
(R1=0)
When R0=4
When R0=9
Y1
Y1
Count Start Count-Up
4 times
9 times
Count-Up
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Remark: If the preset value of the counter is 0 and "CLR" input also at 0, then the Cn contact status and FO0
(CUP) becomes 1 immediately after the PLC finishes its first scan because the "Count-Up" has occurred.
It will stay at 1 regardless how the CV value varies until "CLR" input changes to 1.