Program Examples - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
35.2.7

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
Step
number
1.5
seconds
<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
35 SFC Program and Step Ladder
35.2 Step Ladder
<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
795
31
32
33
34
35
36
37
38
A
B