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目录
前言······································································（2）
1.电梯PLC控制系统························································（2）
1.1什么是可编程控制器？它有什么特点？····································（2）
1.2系统结构和控制器选型··················································（3）
1.3本次实习所选用的PLC机型？以及编程软件？·······························（4）
2.四层楼电梯模拟控制的设计控制要求·········································（4）
3.I/O点的分配·····························································（5）
4.PLC编程程序·····························································（6）
4.1指令表·······························································（6）
4.2 梯形图······························································（17）
5.MCGS组态过程以及相关画面··············································（31）
5.1设计监控界面··························································（31）
5.2定义数据变量·························································（31）
5.3动画连接·····························································（33）
5.4 MCGS与PLC的连接·····················································（35）
5.5 编制循环策略························································（36）
6.实习中的问题····························································（38）
6.1组态画面的设计·························································（38）
6.2组态动画的设计·························································（38）
6.3脚本程序的编写·························································（38）
6.4四层楼电梯的PLC控制程序的编写··········································（38）
结束语·····································································（39）
前言
电梯的电气系统由拖动系统和控制系统两部分组成。传统的电气控制系统采用的继电器逻辑控制由于触点多，故障率高，可靠性差，体积大等缺点，正逐渐被淘汰。目前电梯设计使用可编程控制器（PLC），要求功能变化灵活，编程简单，故障少，噪音低。维修保护方便，节能省工，抗干扰能力强，控制箱占地面积少。当乘员进入电梯，按下楼层按钮，电梯门自动关闭。控制系统进行下列运作：根据轿厢所处位置及乘员所处层数，判定轿厢的运行方向，保证轿厢平层减速，将轿厢停在选定的楼层上，同时，楼层的呼叫，顺路停车，自动开关门。另外在轿厢外均要有信号灯显示电梯的运行方向及楼层数。
MCGS（Monitor and Control Generated System）即：通用监控系统。它是一套用于快速构造和生成计算机监控系统的组态软件，能够在Windows平台上运行。通过对现场数据的采集和处理，以及动画显示，报警处理，流程控制，实时曲线，历史曲线和报表输出等多种方式向用户提供解决实际工
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