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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
35 SFC Program and Step Ladder
35.2 Step Ladder
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
Refer to the preliminary knowledge for creating SFC programs also.
→ For the preliminary knowledge for creating SFC programs, refer to Subsection 35.1.7.
List of sequence instructions available between STL instruction and RET instruction
• 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 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.
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