Preliminary Knowledge For Creating Step Ladder Programs - Mitsubishi Electric MELSEC FX3U Programming Manual

Melsec fx series programmable logic controllers
Table of Contents

Advertisement

FX
/FX
/FX
Series Programmable Controllers
3G
3U
3UC
Programming Manual - Basic & Applied Instruction Edition
Program with jump/repeated flows
1. Program for the transfer source
Use OUT instruction in the jump/repeated part.
<SFC program>
X001
40
X002
1
41
2
2. Program for the transfer destination
There is no change in programming especially for the transfer destination.
<SFC program>
X004
52
X005
3
53
4

35.2.5 Preliminary knowledge for creating step ladder programs

Refer to the preliminary knowledge for creating SFC programs also.
→ For the preliminary knowledge for creating SFC programs, refer to Subsection 35.1.7.
List of sequence instructions available between STL instruction and RET instruction
State relay
Initial/general state relay
Branch/
recombination state
relay
• STL instruction cannot be used in interrupt programs and subroutine programs.
• When using SFC programs (STL instruction), do not drive state relays S using SET or OUT instructions in
an interrupt program.
• It is not prohibited to use jump instructions in state relays. But it is not recommended to use jump
instructions because complicated movements will be resulted.
*1.
MPS instruction cannot be used immediately after an STL instruction, even in a drive processing
circuit.
Y001
X003
3
TRAN
TRAN
52
Jump/repeated part
<Step ladder>
Y002
X004
TRAN
X005
AND/ANI/ANDP/ANDF,
OR/ORI/ORP/ORF,
Drive processing
Transfer processing
<Step ladder>
STL
X001
Y001
X002
SET
X003
S52
Use OUT instruction in the jump/
repeated part.
STL
S52
Y002
SET
S53
Instruction
LD/LDI/LDP/LDF,
ANB/ORB/MPS/MRD/
INV,MEP/MEF,
OUT,SET/RST,
PLS/PLF
Available
Available
Available
Available
Available
Not available
35 SFC Program and Step Ladder
35.2 Step Ladder
<List program>
STL
S40
S40
LD
X001
OUT
Y001
LD
X002
SET
S41
S41
LD
X003
OUT
S52
<List program>
STL
S52
LD
X004
OUT
Y002
LD
X005
SET
S53
MC/MCR
MPP
*1
Not available
*1
Not available
Not available
31
32
33
34
35
36
37
38
A
B
837

Advertisement

Table of Contents
loading

This manual is also suitable for:

Melsec fx3ucMelsec fx3g

Table of Contents