Mitsubishi Electric MELSEC FX3U - Program with State Relays in Branches and Recombination

840
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
35 SFC Program and Step Ladder
35.2 Step Ladder
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.
STL
OUT
LD
SET
LD
SET
LD
SET
21
20
1
X001
X000
Y000
STL S20
SET S21
S20
Y000
X000
S21
X001
S31
X002
S41
Y000
TRAN
31
2
TRAN
41
3
TRAN
SET S31
X002
SET S41
Drive
processing
Transfer
processing
X000 X001 X002
<Step ladder> <List program>
<SFC program>