基于plc电梯调速控制系统的设计 毕业论文 .doc

基于PLC电梯调速控制系统的设计 摘 要 随着我国经济的高速发展，微电子技术、计算机技术和自动控制技术也得到了迅速发展，电梯也已成为人类现代生活中广泛使用的运输工具。随着人们对电梯运行的安全性、舒适性等要求的提高，电梯得到了快速发展，其拖动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。 可编程控制器（PLC）因为稳定可靠、结构简单、成本低廉、简单易学、功能强大和使用方便已经成为应用最广泛的通用工业控制装置，成为当代工业自动化的主要支柱之一。电梯控制要求接入设备使用简便，对应系统组态的编程简单，具有人性化的人机界面，配备应用程序库，加快编程和调试速度。通过PLC对程序设计，提高了电梯的控制水平，并改善了电梯的电梯运行的舒适感。本文争对以上优点，对电梯运行进行了改进，使其达到了比较理想的控制效果。 关键词：PLC,电梯,控制系统,CPU PLC-BASED FOUR-STORY ELEVATOR CONTROL SYSTEM DESIGN ABSTRACT As Chinas rapid economic development, micro-electronics technology, computer technology and automation technology have developed rapidly, elevators have become widely used in modern life, means of transport. As people of the elevator safety, comfort and other required improvements, elevators has been rapid development of its drag technology has developed to a FM voltage speed, its logic control is to replace the original relay by PLC control. Programmable Logic Controller (PLC) because of stable and reliable, simple structure, low cost, easy to learn, powerful and easy to use has become the most widely used general-purpose industrial control devices, contemporary, one of the main pillars of industrial automation. Elevator control requires access device easy to use, the corresponding system configuration programming simple, with user-friendly man-machine interface, with the application database, to speed up programming and debugging speed. Through the PLC to the program design to improve the elevator level of control, and improved elevator elevator running comfort. This contention of the above advantages, the elevator operation has been improved so that it reached a relatively satisfactory control effect． KEY WORDS: plc, elevator, control system, cpu 目 录 引言………………………………………………………………………………1 一 系统控制方案的确定 ………………………………………………………2 1　电梯的概述………………………………………………………………2 2 电梯的结构及组成………………………………………………………2 3 采用PLC控制电梯的优点………………………………………………5 4 系统设计的基本步骤……………………………………………………5 5 系统控制方案………………………………………………………