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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
35 SFC Program and Step Ladder
35.2 Step Ladder
31
FNC277-FNC279
Data
Transfer 3
32
FNC280-FNC289
High-Speed
Processing 2
33
FNC290-FNC299
Extension File
Register Control
34
FNC300-FNC305
FX
3U
-CF-ADP
35
SFC•STL
Programming
36
Interrupt
Function
37
Special Device
38
Error Code
A
Version Up
Information
B
Execution Times
2. Program for the transfer destination
There is no change in programming especially for the transfer destination.
35.2.5 Preliminary knowledge for creating step ladder programs
→ For the preliminary knowledge for creating SFC programs, refer to Subsection 35.1.7.
List of sequence instructions available between the STL instruction and RET instruction
• The 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 because complicated
movements will result.
*1. MPS instruction cannot be used immediately after an STL instruction, even in a drive processing circuit.
Instruction
State relay
LD/LDI/LDP/LDF,
AND/ANI/ANDP/ANDF,
OR/ORI/ORP/ORF,
INV,MEP/MEF,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
STL
LD
OUT
LD
SET
53
52
Y002
3
X004
X004
X005
TRAN
4
X005
Y002
STL S52
SET S53
<Step ladder><SFC program> <List program>
S52
X004
Y002
X005
S53