774
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
35 SFC Program and Step Ladder
35.1 SFC Program
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.
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.
20
M8002
0
1
Ladder block
SFC block
0TRAN
X000
S0SET
T0
TRAN
T0
K20
Initial pulse
Start
Y000SET Motor M1 is
started.
X001
21
T1 K30
Y001SET
Motor
M2 is
started.
27
TRAN
X001
Stop
9
2TRAN
T1 X001
22
T2 K40
Y002SET
Motor
M3 is
started.
26
X001
Stop
10 TRAN
3TRAN
T2 X001
23 Y003SET
Motor
M4 is
started. 25
X001
Stop
11 TRAN
24
T4 K40
Y003RST
Motor
M4 is
stopped.
4TRAN
X001
5TRAN
T4
25
T5 K30
Y002RST
Motor
M3 is
stopped.
6TRAN
T5
26
T6 K20
Y001RST
Motor
M2 is
stopped.
7TRAN
T6
27 Y000RST
Motor M1
is
stopped.
8TRAN
Y000
0
RET END
M1
M3
M3
M4
M4
M3
M2
M1
2 seconds
3 seconds
4 seconds
4 seconds
3 seconds
2 seconds
X000
Start
X001
Stop
StartStop
In the case of stop in the middle of operation, the motors are stopped also in turn in the reverse order.