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784

/FX

3UC

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

Not available

Branch/recombination
state relay

Drive processing

Available

Not available

Transfer processing

Available

Not available

STL
LD
OUT
LD
SET

Y002

X004

X005

TRAN

X005

Y002

STL

S52

SET

S53

S52
X004
Y002
X005
S53