选择题：[设计题,10分] 某自动运输线由两台电动机1M和2M拖动。要求如下：（1）1M先启动，延

题目内容：

[设计题,10分] 某自动运输线由两台电动机1M和2M拖动。要求如下：（1）1M先启动，延时10s后2M才允许启动；（2）2M停止后，才允许1M停止；设计要求：（1）给出I/O分配；（2）绘出PLC梯形图，并写出对应的指令表。

参考答案：

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