|
一、
实验目的
1、
通过对工程实例的模拟，熟练地掌握PLC的编程和程序调试方法。
2、
进一步熟悉PLC的I/O连接。
3、
熟悉三层楼电梯采用轿厢内外按钮控制的编程方法。
二、控制要求
电梯由安装在各楼层厅门口的上升和下降呼叫按钮进行呼叫操纵，其操纵内容为电梯运行方向。电梯轿厢内设有楼层内选按钮S1～S3，用以选择需停靠的楼层。L1为一层指示、L2为二层指示、L3为三层指示，SQ1～SQ3为到位行程开关。电梯上升途中只响应上升呼叫，下降途中只响应下降呼叫，任何反方向的呼叫均无效。例如，电梯停在一层，在三层轿厢外呼叫时，必须按三层上升呼叫按钮，电梯才响应呼叫（从一层运行到三层），按三层下降呼叫按钮无效；反之，若电梯停在三层，在一层轿厢外呼叫时，必须按一层下降呼叫按钮，电梯才响应呼叫，按三层上升呼叫按钮无效，依此类推。
三、
编制梯形图并写出程序，
参考程序 表6-10-1所示
|
步序 |
指 令 |
步序 |
指 令 |
|
0 |
LD T48 |
13 |
OLD |
|
1 |
O T56 |
14 |
LD T67 |
|
2 |
O T75 |
15 |
AN T68 |
|
3 |
AN I0.2 |
16 |
OLD |
|
4 |
AN M0.1 |
17 |
OLD |
|
5 |
AN M0.5 |
18 |
AN Q0.0 |
|
6 |
LD T38 |
19 |
AN Q0.1 |
|
7 |
AN T39 |
20 |
= Q0.2 |
|
8 |
LD T50 |
21 |
LD T52 |
|
9 |
AN T51 |
22 |
O T64 |
|
10 |
OLD |
23 |
AN I0.1 |
|
11 |
LD T67 |
24 |
AN M0.1 |
|
12 |
AN T68 |
25 |
AN M0.2 |
|
步序 |
指 令 |
步序 |
指 令 |
|
26 |
AN M0.3 |
55 |
LD T44 |
|
27 |
AN M0.4 |
56 |
AN T45 |
|
28 |
LD T40 |
57 |
LD T62 |
|
29 |
AN T41 |
58 |
AN T63 |
|
30 |
LD T46 |
59 |
OLD |
|
31 |
AN T47 |
60 |
LD T72 |
|
32 |
OLD |
61 |
AN T73 |
|
33 |
LD T54 |
62 |
OLD |
|
34 |
AN T55 |
63 |
AN Q0.1 |
|
35 |
OLD |
64 |
AN Q0.2 |
|
36 |
LD T58 |
65 |
= Q0.0 |
|
37 |
AN T59 |
66 |
LD I0.2 |
|
38 |
OLD |
67 |
AN I0.4 |
|
39 |
LD T69 |
68 |
AN I0.5 |
|
40 |
AN T77 |
69 |
A I0.3 |
|
41 |
OLD |
70 |
LD M0.1 |
|
42 |
LD T74 |
71 |
AN M0.3 |
|
43 |
AN T78 |
72 |
OLD |
|
44 |
OLD |
73 |
AN I0.0 |
|
45 |
OLD |
74 |
= M0.1 |
|
46 |
AN Q0.0 |
75 |
AN M2.0 |
|
47 |
AN Q0.2 |
76 |
TON T38, +10 |
|
48 |
= Q0.1 |
77 |
LD T38 |
|
49 |
LD T42 |
78 |
TON T39, +30 |
|
50 |
O T60 |
79 |
LD T39 |
|
51 |
O T70 |
80 |
AN I0.2 |
|
52 |
AN I0.0 |
81 |
TON T40, +30 |
|
53 |
AN M0.3 |
82 |
TON T41, +50 |
|
54 |
AN M0.6 |
83 |
TON T42, +80 |
|
步序 |
指 令 |
步序 |
指 令 |
|
84 |
TON T43, +100 |
116 |
TON T50, +10 |
|
85 |
LD I0.0 |
117 |
LD T50 |
|
86 |
AN I0.3 |
118 |
TON T51, +30 |
|
87 |
AN I0.4 |
119 |
LD T51 |
|
88 |
A I0.5 |
120 |
AN I0.2 |
|
89 |
LD M0.3 |
121 |
TON T52, +30 |
|
90 |
AN M0.1 |
122 |
TON T53, +50 |
|
91 |
AN M0.5 |
123 |
LD I0.2 |
|
92 |
OLD |
124 |
AN I0.5 |
|
93 |
AN I0.2 |
125 |
A M0.1 |
|
94 |
= M0.3 |
126 |
A M0.5 |
|
95 |
AN M2.1 |
127 |
AN M2.1 |
|
96 |
TON T44, +10 |
128 |
LD M2.0 |
|
97 |
LD T44 |
129 |
AN M0.2 |
|
98 |
TON T45, +30 |
130 |
AN M0.3 |
|
99 |
LD T45 |
131 |
AN M0.4 |
|
100 |
AN I0.0 |
132 |
AN M0.6 |
|
101 |
TON T46, +30 |
133 |
OLD |
|
102 |
TON T47, +50 |
134 |
AN I0.0 |
|
103 |
TON T48, +80 |
135 |
= M2.0 |
|
104 |
TON T49, +100 |
136 |
TON T67, +10 |
|
105 |
LD I0.2 |
137 |
LD T67 |
|
106 |
AN I0.3 |
138 |
TON T68, +30 |
|
107 |
AN I0.5 |
139 |
LD T68 |
|
108 |
A I0.4 |
140 |
AN I0.2 |
|
109 |
LD M0.5 |
141 |
AN I0.1 |
|
110 |
|
