摘 要 PLC（可编程控制器）作为一种工业控制微型计算机，它以其编程方便、操作简单尤其是它的高可靠性等优点，在工业生产过程中得到了广泛的应用。变频技术的进展推动了 PLC 的应用。它应用大规模集成电路，微型机技术和通讯技术的进展成果，逐步形成了具有多种优点和微型，中型，大型，超大型等各种规格的系列产品，应用于从继电器控制系统到监控计算机之间的许多控制领域。 随着现代城市的进展，高层建筑日益增多，电梯成为人们日常生活必不可少的代步工具。电梯性能的好坏对人们生活的影响越来越显著，因此必须努力提高电梯系统的性能，保证电梯的运行即高效节能又安全可靠。本文详细阐述了四层集选控制电梯自动运行程序的设计过程，内容包括电梯电力拖动方式的选择，电气控制方式的选择，以及程序的软硬件设计和说明。关键词：电梯，PLC，变频调速Abstract PLC (Programmable Logical Controller) took one kind most important, the application situation most industries control microcomputer, it is convenient, operation simple in particular by its programming merit and so on redundant reliability, obtained the widespread application in the industrial production process. It applies the large scale integrated circuit, the miniature machine technology and the communication technology development achievement, gradually formed had the many kinds of merits. With the development of modern cities, the increasing high-rise buildings, elevators become an indispensable means of transport for daily life.Elevator performance is good or bad influence on people's lives more significantly, it must strive to improve the performance of elevator system to ensure that energy-efficient elevator operation safe and reliable.This thesis particularly expatiate the design process of the four-lays elevator automatic circulation. the contents includes the choice of the electric drag mode, the electric controls mode and the soft- hardware of the design procedure with explains. Keywords: elevator; PL...
