摘要随着我国国民经济的飞速发展，现代化程度日益提高，高层建筑多，电梯也随之增多，电梯产品在人们的物质文化生活中的地位也得到了提高，成为重要的交通运输设备之一。国内以前传统的电梯控制是有继电器、接触器构成。他不仅存在着可靠性差、成本高、高故障率等缺点，而且楼房层数增加时，配线变化给制造及安装带来诸多不便。若用 PLC 控制就解决了以上的不足。首先，分别阐述了电梯继电器控制和 PLC 控制的特点，突出讲述继电器电梯控制系统暴露的缺点以及 PLC 电梯控制系统所具有的优点，其次，在阅读了大量国内外相关文件资料的基础上，对电梯技术和电梯设备的发展进行了综述。然后介绍了 PLC 选型原则以及 PLC 控制系统的设计思路;在此基础上，根据电梯系统自身的工作状态要求，进行电梯系统的 PLC 软件开发，通过软件开发的特点，结合 PLC 自身的控制规律，设计出可实现一定功能的 PLC 电梯控制系统。本设计就以 PLC 做为工具对电梯的各种操作进行控制。先对三层电梯的硬件部分做分析，看需要什么样的开关、信号等等。然后，画出他的控制面板图，根据 I/O 点数来确定 PLC 机型，最后再进行原件设计，画出程序流程图，写出梯形图，随之在计算机上进行仿真。关键词：PLC 电梯控制系统IAbstractWith the rapid development of our country's national economy, the degree of modernization is increasing day by day, there are more high-rise buildings and more elevators. The position of elevator products in people's material and cultural life has also been improved, and it has become one of the important transportation equipment. The traditional elevator control in China is composed of relay and contactor. He not only has the shortcomings of poor reliability, high cost and high failure rate, but also brings many inconvenience to manufacture and installation when the number of buildings increases. If the use of PLC control to solve the above shortcomings.Firstly, the characteristics of elevator relay control and PLC control are described, and the disadvantages exposed by relay elevator control system and the advanta...
