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6 Step Ladder Instructions
6.1 Step Ladder
93
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)
2. Primary knowledge for creating programs
• List of sequence instructions available between STL instruction and RET instruction
- STL instruction cannot be used in interrupt program and subroutine programs.
- 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.
State relay
Instruction
LD/LDI/LDP/LDF
AND/ANI/ANDP/ANDF,
OR/ORI/ORP/ORF, OUT,
SET/RST, PLS/PLF
ANB/ORB/MPS/MRD/
MPP
MC/MCR
Initial/general state relay Available
Available
*1
Not available
Branch/recombination
state relay
Drive processing Available
Available
*1
Not available
Transfer
processing
Available Not available Not available
Process
of S32
Process of S31
When X001 turns ON,
S32 turns ON and S31
is automatically reset.
Y31 programmed in SET
instruction remains ON
even if S31 is reset.
*1
Y030
S31
SET
EN ENO
d Y31
STL
EN ENO
s
SET
EN ENO
d S32
X001
Y030
S32
STL
EN ENO
s
SET
EN ENO
d S33
X002
Y032
Activated
Y030
S31
SET
EN ENO
d Y31
STL
EN ENO
s
SET
EN ENO
d S32
X001
Y030
S32
STL
EN ENO
s
SET
EN ENO
d S33
X002
Y032
*1. Output coils can be used again in different state relays.
*1