Mitsubishi Electric MELSEC FX3U Programming Manual page 830

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4. Example of sequential start and stop
The motors M1 to M4 are started in turn by a timer, and stopped in turn in the reverse order.
This SFC flow is based on a single flow, and has jumps of state relays.
Start
X000
2 seconds
3 seconds
4 seconds
Stop
X001
4 seconds
3 seconds
2 seconds
This SFC program shows an example in which a part of the flow is skipped according to a condition, and the
execution is transferred to a state in a lower position.
The execution can be transferred to a state in an upper position.
828
Ladder block
M1
M8002
Initial pulse
M3
SFC block
M3
M4
M4
M3
M2
M1
RET
SET S0
0
X000
0 TRAN
Start
20
SET Y000
T0
K20
T0 X001
1
TRAN
21
SET Y001
T1
K30
T1 X001
2
TRAN
22 SET Y002
T2
K40
T2 X001
3
TRAN
23
SET Y003
X001
4
TRAN
Stop
24
RST Y003
T4
K40
T4
5
TRAN
25
RST Y002
T5
K30
T5
6
TRAN
26
RST Y001
T6
K20
T6
7
TRAN
27 RST Y000
Y000
TRAN
8
0
END
35 SFC Program and Step Ladder
35.1 SFC Program
Motor M1 is
started.
X001
9
TRAN
Stop
Motor
M2 is 27
started.
X001
10
TRAN
Stop
Motor
M3 is 26
started.
X001
11
TRAN
Motor
M4 is 25
started.
Motor
M4 is
stopped.
Motor
M3 is
stopped.
Motor
M2 is
stopped.
Motor M1
is
stopped.