基于PLC的三层电梯控制系统设计.docx

基于PLC 基于PLC的三fe!电悌柠制系统没il ABSTRACT In the modern society, the rapid development of the brokerage, high-rise buildings, increasingly, high-rise buildings, floors high，dozens of layer is only stairs have been unable to meet the demand of people, the emergence of the elevator solved this difficult problem, therefore, the development of the elevator has also become a kind of trend, for elevator control more and more high, favored by people, became a high-rise building columns in the bus. People living well，also to the requirement of safety and comfort of life is higher, so the elevator in later development, also with the development of this trend. About how to attain the passenger elevator, safe and comfortable this problem, the elevator control requirements in the motor speed and control precision and speed range and so on, puts forward the more strict control requirements in each aspect. Also was born, with the development of industrial demand， PLC control using PLC. provided the development direction of wider. PLC for industry, along with its development, its volume is more and more small, function also more and more perfect, the control effect is more stable, can reduce the influence of interference on the. With the mechanical and electrical components, the function of integrated in a system. Therefore, PLC for the development of the elevator, has become the key technology of its operation Keywords: elevator. PLC， relay 基于PLC 基于PLC的三fe!电悌柠制系统没il D) D) 目录 TOC \o 1-5 \h \z 前言 1 \o Current Document 第一章电梯的概述 3 1.1电梯的定义 3 1.2电梯的框架 3 1.3电器部件 4 1.4电悌控制系统发展的现状 5 1.5电梯继电器掠制系统的特点及存在问题 6 1.6电梯技术发展趋势 6 \o Current Document 第二韋PLC的概述 8 1 蚊 8 2 雌 8 3 髄 9 PLC与其他T业控制系统的比较 12 2. 5发展历史 14 2. 6 PLC的现状及发展趋势 14 \o Current Document 第三章三层电梯的设计 16 3.1拎制系统设计的基本原理 16 3.2拎制系统总体设计方案 16 \o Current Document 3.2.1控制要求 17 3.2.2主电路的系统设计 17 \o Current Document 3.2.3硬件选型 18 \o Current Document 3.2.4电梯的I/O点分配 19 \o Current Document 2. 5控制流程阁 21 2. 6程序梯形阁 24 \o Current Document 2. 7程序语句