35.1.11 Program Examples - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
6. It is not permitted to cross flows in SFC programs.
Change a flow on the left to a flow on the right. This change enables inverse conversion from a program on the
instruction word basis into an SFC program. (The flow on the left cannot be converted into an SFC program.)

35.1.11 Program examples

Examples of single flows
1. Example of flicker circuit
1) When the PLC mode is changed from STOP to RUN, the state relay S3 is driven by the initial pulse (M8002).
2) The state relay S3 outputs Y000. One second later, the ON status transfers to the state relay S20.
3) The state relay S20 outputs Y001. 1.5 seconds later, the ON status returns to the state relay S3.
Y000
Y001
1
second
Cross is not
allowed.
1.5
seconds
Change
M8002
Ladder block
Initial pulse
3
SFC block
0
20
1
3
35 SFC Program and Step Ladder
35.1 SFC Program
SET S3
Y000
T0
K10
T0
TRAN
Y001
T1
K15
T1
TRAN
775
31
32
33
34
35
36
37
38
A
B