Mitsubishi Electric FX3G SERIES Programming Manual page 781

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
The partial skip flow shown on the previous page can be expressed in a flow of selective branches and recombination
as shown below.
Make sure that a flow proceeds from top to bottom, and that a flow does not cross except branch lines and
recombination lines.
Ladder block
M8002
Initial pulse
SFC block
0
X000
0
Start
20
T0
1
21
T1 X001
2
22
T2 X001
3
23
X001
4
Stop
24
T4
5
25
T5
6
26
T6
7
27
Y000
8
0
RET END
SET S0
TRAN
SET Y000
T0
K20
X001
TRAN
SET Y001
T1
K30
TRAN
SET Y002
T2
K40
X001
9
TRAN
Stop
SET Y003 30*
TRAN
RST Y003
T4
K40
S30
10
TRAN
RST Y002
T5
K30
TRAN
RST Y001
T6
K20
TRAN
RST Y000
*
TRAN
X001
11
Stop
TRAN
31*
TRAN
S31
12
Dummy state relay
For example, if X001 turns ON while the state relay S20 is ON,
the state relay S32 turns ON; The contact of S32 turns ON, and
the ON status is immediately transferred to the state relay S27.
Because one or more state relays are required in a branch line,
dummy states are provided for this purpose.
35 SFC Program and Step Ladder
35.1 SFC Program
X001
13
TRAN
Stop
TRAN
32*
TRAN
S32
14
TRAN
779
31
32
33
34
35
36
37
38
A
B