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7: B
ASIC
I
NSTRUCTIONS
O
PEN
N
ET
C
ONTROLLER
U
SER
’
S
M
ANUAL
7-17
Examples: TC= and TC
≥
(Timer Comparison)
Ladder Diagram 1
Timing Chart
TC=
50
T2
I0
TC>=
30
T2
Input I0
ON
OFF
T2 Current Value
ON
OFF
Output Q0
ON
OFF
Output Q1
ON
OFF
Prgm Adrs
Instruction
Data
0
1
2
3
4
5
6
7
8
LOD
TIM
TC=
OUT
TC
≥
OUT
I0
T2
100
T2
50
Q0
T2
30
Q1
Program List
TIM
100
T2
100 99
51 50 49
31 30 29
• • •
• • •
Output Q0 is on when timer T2 current value
is 50.
Output Q1 is turned on when timer T2
star ts to timedown and remains on until the
current value reaches 30.
Q0
Q1
Ladder Diagram 2
Output Q0 is on when timer T30 current
value is 500.
Prgm Adrs
Instruction
Data
0
1
2
3
4
5
LOD
TML
TC=
OUT
I1
T30
1000
T30
500
Q0
Program List
TC=
500
T30
I1
TML
1000
T30
Timing Chart
Input I1
ON
OFF
Timer T30
ON
OFF
Output Q0
ON
OFF
1000
501 500 499
• • •
498
Current Value
Q0
Ladder Diagram 3
Output Q1 is turned on when timer T15
star ts to time down and remains on
until the current value reaches 350.
Prgm Adrs
Instruction
Data
0
1
2
3
4
5
LOD
TIM
TC>=
OUT
I2
T15
600
T15
350
Q1
Program List
TC>=
350
T15
I2
TIM
600
T15
Timing Chart
Input I2
ON
OFF
Timer T15
ON
OFF
Output Q1
ON
OFF
600
352 351 350
• • •
349
Current Value
Q1
Ladder Diagram 4
Output Q3 is turned on while timer T20
current value is between 149 and 100.
Instruction
Data
LOD
TIM
TC>=
OUT
TC>=
ANDN
OUT
I3
T20
500
T20
150
Q2
T20
100
Q2
Q3
Program List
TC>=
150
T20
I3
TIM
500
T20
Timing Chart
Input I3
ON
OFF
Timer T20
ON
OFF
Output Q2
ON
OFF
150 149
101
• • •
100
Current Value
TC>=
100
T20
Q2
99
500
• • •
Output Q3
ON
OFF
Q2
Q3
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