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Programming Examples in the STL, LAD and CSF Methods of Representation
Timer operations (continued)
Extended pulse timer
Logical/circuit diagram
I 3.1
I 3.1
T2
R
S
1
T 2
Q4.1
The timer is started during the first scan if the RLO is
"1".
An RLO of "0" does not affect the timer.
The scan AT or OT produces a signal "1" as long as
the timer is running.
IW 15:
Set the timer with the value of the operand I, Q, F or
D in BCD code (in this example, input word 15).
CPU 948 Programming Guide
C79000-G8576-C848-04
Statement
list
A
I
3.1
L
IW 15
SE
T
2
A
T
2
=
Q
4.1
T 2
Q4.1
STEP 5 representation
Ladder
diagram
T2
I 3.1
1
V
IW15
TW
BI
DE
Q4.1
R
Q
(IB 15)
5 4 3
Time
base
I 3.1
Q4.1
T
Control system
flowchart
T2
I 3.1
1
V
TW
BI
IW15
DE
Q4.1
R
Q
=
(IB 16)
0 7
4 3
0
10 2
10 1
0
10
Timer value
T
3 - 41
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