Mitsubishi Electric MELSEC FX3U Programming Manual page 819

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Separation of flow
When creating an SFC program having two or more initial state relays, separate the blocks for each initial
state relay.
The ON status can be transferred among SFC programs created by block separation (jump to a different flow).
A state relay in a program created in a different block can be used as a contact for the internal circuit or transfer
condition of another state relay.
1. Separation of flow
2. Jump to another flow
3. Using a state relay in a program created in a different block
SFC block 1 SFC block 3
3
20
21
22
3
SFC block 1
3
20
41
21
22
3
SFC block 1
3
S40
0 TRAN
20
1
S41
21
Y000
2
22
3
3
35 SFC Program and Step Ladder
4
40
41
42
4
SFC block 3
4
40
41
42
4
SFC block 3
4
0
40
S20
1
S21
41
2
42
3
4
35.1 SFC Program
31
32
33
34
35
36
37
38
A
TRAN
Y010
B
817