Program Examples - Mitsubishi FX3U Series Programming Manual

FX /FX Series Programmable Controllers
3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4) Parallel recombination and selective branch
<SFC program>
20
X000
1
TRAN
103
Dummy state
X001
2
TRAN
40

34.2.7 Program examples

Examples of single flows
1. Example of flicker circuit
• When the PLC mode is changed from STOP to RUN, the state relay S3 is driven by the initial pulse
(M8002).
• The state relay S3 outputs Y000. 1 second later, the ON status transfers to the state relay S20.
• The state relay S20 outputs Y001. 1.5 seconds later, the ON status returns to the state relay S3.
Y000
Y001
1
second
30
X002
3
TRAN
50
Step
number
1.5
seconds
<Step ladder>
STL
STL
X000
SET
STL
X001
SET
X002
SET
<Step ladder>
M8002
SET S3
0
Initial pulse
STL S3
3
Y000
4
T0
T0
SET S20
8
STL S20
11
Y001
12
T1
T1
S3
16
RET
19
END
20
34 SFC Program and Step Ladder
34.2 Step Ladder
<List program>
STL S20
S20
STL S30
S30 LD X000
SET S103
S103
STL S103
LD X001
S103
SET S40
LD X002
S40
SET S50
S50
<List program>
Step
0 LD M8002
number
1 SET S3
3 STL S3
4 OUT Y000
5 OUT T0 K10
8 LD T0
K10
9 SET S20
11 STL S20
12 OUT Y001
13 OUT T1 K15
16 LD T1
17 OUT S3
19 RET
K15
20 END
31
32
33
34
35
36
37
A
B
C
775