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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
35 SFC Program and Step Ladder
35.1 SFC Program
Reset of state relays at one time and output disability
For output disability corresponding to emergency stop, follow “Cautions on safety” described in the PLC manual.
1) Resetting many state relays at one time by specifying a range
Fifty-one state relays from S0 to S50 are reset at one time.
2) Disabling arbitrary output of state relays in the ON status
3) Setting to OFF all output relays (Y) in a PLC
Even while the special auxiliary relay M8034 is ON, the sequence program is executed continuously, but all output
relays (Y) turn OFF. (These output relays are in the ON status in the monitor.)
Position of MPS, MRD and MPP instructions
MPS, MRD or MPP instruction cannot be used directly from a bus line in a state relay inside the STL.
Program MPS, MRD or MPP instruction after LD or LDI instruction as shown below.
Ladder block
SFC block
Reset
FNC 40
ZRST
S0 S50
S0
State relays from S0 to
S50 are reset at one time.
50
0
Ladder block
SFC block
Output disable
SET M10
10
Y001
M10
Y005
M30
T4
Even when the output
disable contact turns ON,
this output remains ON.
When the output disable
contact turns ON, these
outputs turn OFF.
Ladder block
Output disable
M8034
Even while the special auxiliary relay M8034 is ON, the sequence
program is executed continuously, but all output relays (Y) turn OFF.
10
Y001
Y002
Y003
X001
LD
X003
X004
X005
STL bus line
MPS
MRD
MPP