IDEC MicroSmart - Manual (Page 199)

7: B ASIC I NSTRUCTIONS
« FC4A M ICRO S MART U SER ’ S M ANUAL » 7-15
Examples: CC= and CC
≥ (Counter Comparison)
Ladder Diagram 1
Timing Chart
CC=
5 C2
CNT C2
10
I1
Reset
Pulse
I0
CC>=
3 C2
Reset Input I0
ON
OFF
Pulse Input I1
ON
OFF
C2
ON
OFF
Output Q1
ON
OFF
1
Output Q0
• • •
2 3 4 5 6
ON
OFF
7 8 9 10
Instruction Data
LOD
LOD
CNT
CC=
OUT
CC
≥
OUT
I0
I1
C2
10
C2
5
Q0
C2
3
Q1
Program List
Output Q0 is on when counter C2 current
value is 5.
Output Q1 is turned on when counter C2
current value reaches 3 and remains on
until counter C2 is reset.
Q0
Q1
Ladder Diagram 2
Pulse Input I2
ON
OFF
Output Q0
ON
OFF
Timing Chart
1
• • •
500 501 502 2
Output Q0 is on when counter C30 current
value is 500.
CC=
500 C30
CNT C30
1000
I2
Reset
Pulse
I1
Instruction Data
LOD
LOD
CNT
CC=
OUT
I1
I2
C30
1000
C30
500
Q0
Program List
Q0
Ladder Diagram 3
Pulse Input I4
ON
OFF
Output Q1
ON
OFF
Timing Chart
1
• • •
350 351 352 2
Output Q1 is turned on when counter C31
current value reaches 350 and remains on
until counter C31 is reset.
CC>=
350 C31
CNT C31
500
I4
Reset
Pulse
I3
Instruction Data
LOD
LOD
CNT
CC>=
OUT
I3
I4
C31
500
C31
350
Q1
Program List
Q1
Ladder Diagram 4
Pulse Input I6
ON
OFF
≥C20 (100) ON
OFF
Timing Chart
100
• • •
150 151 152 101
Q2
Output Q2
ON
OFF
Output Q3
ON
OFF
• • •
Output Q3 is on when counter C20 current
value is between 100 and 149.
Instruction Data
LOD
LOD
CNT
CC>=
OUT
CC>=
ANDN
OUT
I5
I6
C20
500
C20
150
Q2
C20
100
Q2
Q3
Program List
CC>=
150 C20
CNT C20
500
I6
Reset
Pulse
I5
CC>=
100 C20
Q2
Q3