Mitsubishi Electric MELSEC FX Series - Page 107

6 Step Ladder Instructions
6.1 Step Ladder
105
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
8
Interrupt Function and Pulse Catch Function
A
Relationships between devices and addresses
• 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.
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