Program With State Relays In Branches And Recombination - Mitsubishi FX3U Series Programming Manual

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

34.2.6 Program with state relays in branches and recombination

1. Example of selective branch
Do not use MPS, MRD, MPP, ANB and ORB instructions in a transfer processing program with branches and
recombination.
Even in a load driving circuit, MPS instructions cannot be used immediately after STL instructions.
In the same way as programs for general state relays, program the drive processing first, and then program
the transfer processing.
Continuously program all transfer processing.
<SFC program>
20
X000
1
21
<Step ladder>
STL
Y000
X000
SET
X001
SET
X002
SET
Y000
X001
TRAN 2 TRAN
31
S20
Drive
processing
S21
Transfer
S31
processing
S41
X002
3 TRAN
41
<List program>
STL S20
OUT Y000
LD X000
SET S21
LD X001
SET S31
LD X002
SET S41
34 SFC Program and Step Ladder
34.2 Step Ladder
771
31
32
33
34
35
36
37
A
B
C