Mitsubishi Electric MELSEC FX3U Programming Manual page 849

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
The figure below shows a step ladder program for selecting the ball size and judging balls as accepted or
rejected.
<Step ladder>
M8002
0
Initial pulse
X001 X003 Y001
3
Left Upper
Release
limit limit
7
X026 X007
8
Start Origin
12
13
T0 X002
17
Lower limit (small ball)
T0 X002
21
25
26
30 T1
33
34
T1
38
41
42
T3
43
46
47
X003
48
51
X004 Y004
52
55
X005 Y004
56
59
X004
60
63
X005
64
SET S0
67
Origin 68
Y007
indication
69
STL S0
72
SET S21
73
STL S21
Moving
Y000
down
77
T0
K20
80
SET S22
81
SET S25
82
STL S22
85
Suction
SET Y001
86
T1
89
K10
SET S23
92
STL S25
93
Suction
SET Y001 The ON status is transferred to the recombination state
relay S30 when X004 turns ON in the case of small ball,
or when X005 turns ON in the case of large ball.
T1
When the special auxiliary relay M8040 is driven, all transfers
K10
to any state relay are disabled.
SET S26
In each of the state relays S24, S27 and S33, an interlock
contact is connected in series respectively to the rightward
STL S23
movement output Y003 and leftward movement output Y004.
Moving
Y002
up
SET S24
STL S26
Moving
Y002
up
SET S27
STL S24
10
Moving
12
Y003
rightward
13
14
STL S27
17
Moving
Y003
18
rightward
19
STL S24
21
22
SET S30
23
25
STL S27
26
27
SET S30
30
31
33
STL
X002
SET
STL
RST
T2
SET
STL
X003
SET
STL
X001 Y003
X001
<List program>
0 LD M8002 34 SET
1 SET S0 35 OUT
3 LD X001 38 LD
4 AND X003 39 SET
5 ANI Y001 41 STL
6 OUT Y007 42 OUT
7 STL S0 43 LD
8 LD X026 44 SET
9 AND Y007 46 STL
SET S21 47 OUT
STL S21 48 LD
OUT Y000 49 SET
OUT T0 K20 51 STL
LD T0 52 LDI
AND X002 53 ANI
SET S22 54 OUT
LD T0 55 STL
ANI X002 56 LDI
SET S25 57 ANI
STL S22 58 OUT
SET Y001 59 STL
OUT T1 K10 60 LD
LD T1 61 SET
SET S23 63 STL
STL S25 64 LD
35 SFC Program and Step Ladder
35.2 Step Ladder
S30
Moving
Y000
down
S31
S31
Y001 Release
T2
K10
S32
S32
Moving
Y002
up
S33
S33
Moving
Y004
leftward
S0
RET
END
Y001 65 SET S30
T1 K10 67 STL S30
T1 68 OUT Y000
S26 69 LD X002
S233 70 SET S31
Y002 72 STL S31
T3 73 RST Y001
S24 74 OUT T2 K10
S26 77 LD T2
Y002 78 SET S32
X003 80 STL S32
S27 81 OUT Y002
S24 82 LD X003
X004 83 SET S33
Y004 85 STL S33
Y003 86 LDI X001
S27 87 ANI Y003
X005 88 OUT Y004
Y004 89 LD X001
Y003 90 OUT S0
S24 92 RET
X004 93 END
S30
S27
X005
31
32
33
34
35
36
37
38
A
B
847