Mitsubishi Electric MELSEC FX Series - Page 108

6 Step Ladder Instructions
6.1 Step Ladder
106
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
• Composition of branches and recombination
When a recombination line is directly connected to a branch line (not by way of a state relay as shown
below), it is recommended to provide a dummy state relay between the lines.
Create step ladder programs as shown below.
1) Selective recombination and selective branch
2) Parallel recombination and parallel branch
3) Selective recombination and parallel branch
S20
STL
EN ENO
s
SET
EN ENO
d S100
X000
S30
STL
EN ENO
s
SET
EN ENO
d S100
X001
S100
STL
EN ENO
s
SET
EN ENO
d S50
X003
SET
EN ENO
d S60
X004
S20
STL
EN ENO
s
S30
STL
EN ENO
s
SET
EN ENO
d S101
X000
S101
STL
EN ENO
s
SET
EN ENO
d S50
S101
SET
EN ENO
d S60
S20
STL
EN ENO
s
SET
EN ENO
d S102
X000
S30
STL
EN ENO
s
SET
EN ENO
d S102
X001
S102
STL
EN ENO
s
SET
EN ENO
d S40
S102
SET
EN ENO
d S50