776
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
34 SFC Program and Step Ladder
34.2 Step Ladder
2. Example of fountain control
1) Cyclic operation (X001
=
OFF, X002
=
OFF)
When the start button X000 is pressed, the outputs turn ON in the order “Y000 (wait indication)
→
Y001
(center lamp)
→
Y002 (center fountain)
→
Y003 (loop line lamp)
→
Y007 (loop line fountain)
→
Y000
(wait indication)”, and then the outputs return to the wait status.
Each output is switched in turn every 2 seconds by a timer.
2) Continuous operation (X001
=
ON)
Y001 to Y007 turn ON in turn repeatedly.
3) Stepping operation (X002
=
ON)
Every time the start button is pressed, each output turns ON in turn.
LD
OUT
LD
ANI
OUT
LD
SET
STL
OUT
LD
SET
STL
OUT
OUT
LD
SET
STL
OUT
OUT
LD
SET
STL
OUT
OUT
LD
SET
STL
OUT
OUT
LD
AND
OUT
LD
ANI
OUT
RET
END
M8000
M8047
X002
X000
M8040
M8002
S3
S3
Y000
X000
S20
S20
Y001
T1 K20
T1
S21
S21
Y002
T2 K20
T2
S22
S22
Y003
T3 K20
T3
S27
S27
Y007
T7 K20
T7
X001
S20
T7
X001
S3
M8000
0
1
3
4
5
7
8
10
11
12
13
15
16
17
20
21
23
24
25
28
29
31
32
33
36
37
39
40
41
44
45
46
48
49
50
52
53
0
3
10
11
X002 X000
M8002
7
SET
STL
X000
12
SET
15
STL
16
T1
20
SET
23
STL
24
T2
28
SET
31
STL
32
T3
36
SET
39
STL
40
44
T7
X001
48
T7
X001
52
53
K20
T1
T2
Y007
T7
K20
K20
K20
S20
S3
S3
S3
S20
Y000
Y001
S20
S21
S21
Y002
S22
S22
Y003
T3
S27
S27
RET
END
M8047
M8040
RUN monitor
Stepping
Initial pulse
Start
Enable
STL
monitoring
STL
transfer
disable
Initial state
relay
Start button
Wait
indication
Center lamp
Center
fountain
Loop line
lamp
Loop line
fountain
Continuous
Cyclic/stepping
<List program>
<Step ladder>
