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

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

35.2.6 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
840
Y000
X001
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
35 SFC Program and Step Ladder
35.2 Step Ladder
TRAN