基于PLC的电梯控制系统精选.doc

目 录 0 前言·····························································2 1 控制系统总体方案·················································2 1.1 PLC简介·····················································2 1.2 CPU处理模块················································3 1.3系统工作原理·················································5 2 三层电梯PLC硬件配置··············································6 2.1 三层电梯的I/O分配··········································6 2.2 三层电梯的外部接线·········································6 3 PlC软件设计······················································8 3.1实验程序流程图···············································8 3.2实验程序····················································8 4、三层电梯的监控界面的设计·········································17 4.1 组态软件的概述·············································17 4.2 定义数据词典··············································18 4.3 用户界面的制作············································19 4.4 命令语言的编写············································20 5 总结·····························································28 参考文献···························································29 基于PLC的电梯控制系统 丛厚林 沈阳航空航天大学自动化学院 摘要：三层电梯是一种用电机正反转控制、自动门开关门控制、轿内指令和层站召唤控制的控制系统。电梯的行车方向由内选信号决定，顺向优先；电梯行驶过程中如有遇呼信号时，顺向截车，反向不截车；内选信号和内呼信号有记忆功能，当自动门到达层站开门时解除记忆功能；自动门到层站时自动开，能够延时关门，停层时，可手动开关门；对电梯上升下降过程进行设定故障报警功能；若没有内外呼梯信号，电梯自动返回第一层待命；开始时，电梯若不在第一层返回第一层。本文主要采用PLC实现对三层电梯的下位机控制，并通过组态软件对上位机进行实时监控.文中首先介绍了PLC和三层电梯的工作原理，在设计硬件的基础上，对软件进行设计，采用组态软件建立人机监控界面，包括组态界面的制作方案，功能语言的实现，最后对系统进行调试，并给出相关的参考程序，实现三层电梯 的工作过程。 关键词：三层电梯；PLC；组态软件 0. 前言 在现代社会和经济活动中，计算机技术、自动控制技术和电力电子技术得到了迅速的发展，电梯已经成为城市物质文明的一种标志。特别是在高层建筑中，电梯是不可缺少的垂直运输设备。随着高层建筑飞速发展的今天，电梯行业也随之进入了新的发展时期,电梯控制技术已经发展到了调频调压调速，其逻辑控制也由PLC代替原来的继电器控制，其许多功能是传统的继电器控制系统无法实现的。 　　本设计针对我国电梯业的现状，将可编程序控制器(PLC)应用于三层电梯进行逻辑控制，通过合理的选择和设计，不但提高了电梯可靠性、可维护性以及灵活性，同时延长了使用寿命，缩短了电梯的开发周期，并提高了电梯的控制水平，改善了电梯运行的舒适感，使电梯达到了较为理想的控制效果。本文所设计的电梯与传统的电梯相比，在运行上具有良好的舒适感，在生活中可以节约电能，取得了良好的经济效益和社会效益，达到了理想的目的。该电梯控制系统具有指层、厅召唤、选层选向、手动和自动等功能，具有集选控制的特点。 在介绍电梯基本结构的基础上，深入分析了电梯的工作原理，阐述了PLC的优点及特点，重点分析了电梯的硬