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6 Step Ladder Instructions
6.1 Step Ladder
97
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
1
Outline
2
Instruction List
3
Configuration of
Instruction
4
How to Read
Explanation of
Instructions
5
Basic Instruction
6
Step Ladder
Instructions
7
Applied Instructions
(Program Flow)
8
Applied Instructions
(Move and
Compare)
9
Applied Instructions
(Arithmetic and
Logical Operation)
10
Applied Instructions
(Rotation and
Shift Operation)
• Example of parallel recombination
Do not use MPS, MRD, MPP, AND (…) and OR (…) 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.
Pay attention to the programming order so that a branch line does not cross a recombination line.
Before recombination, program the drive processing of state relays first.
After that, program only the transfer processing to recombination state relays continuously.
• 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
Drive processing
X010 X011 X012
Y010
S29
STL
EN ENO
s
Y011
S39
STL
EN ENO
s
Y012
S49
STL
EN ENO
s
Transfer processing
S29
STL
EN ENO
s
S39
STL
EN ENO
s
S49
STL
EN ENO
s
SET
EN ENO
d S50
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