PLC控制的变频调速电梯系统设计+梯形图

摘要随着我国经济的不断发展,高层建筑也在不断增多,作为高层建筑中垂直运行的交通工具,电梯与人们的日常生活联系密切。传统的电梯控制是用继电器控制的，但是，人们对电梯的安全性、可靠性的要求越来越高，电梯控制技术已经发展到调频调速，其逻辑控制也由PLC来代替。46091
本次设计针对电梯行业的目前状况,深入分析了电梯的工作原理，主要使用西门子S7-200 PLC对电梯系统进行逻辑控制，西门子MM420变频器对电梯系统进行变频调速,七段数码管作为楼层显示器,把蜂鸣器作为超重报警器,来实现电梯上下行、电梯准确到达楼层、电梯开关门、电梯楼层显示以及电梯超重报警等基本功能。最后，对硬件进行安装调试并完成软件的仿真调试。
毕业论文关键词：电梯；PLC控制；变频调速
ABSTRACT
With the continuous development of China's economy, high-rise buildings are also increasing, as a vertical operation of the high-rise buildings, lift is closely related to people's daily life. Traditional lift control is with the relay control, however, people have become increasingly demanding on the safety and reliability of lift, lift control technology has been developed to frequency modulation, the logic control is also replaced by PLC.
This design in view of China's lift industry status, analyses the working principle of the lift deeply, using Siemens S7-200 PLC as logic control of lift system, Siemens MM420 inverter is used as frequency conversion and speed control of lift system, seven segment digital tube is used as display floor, buzzer is used as overweight alarm. The system implements the following functions：lift's uplink and downlink, lift can accurately reach the floor, the lift's opening and closing, the lift's floor display and the lift's overweight alarm. At last, the hardware is installed and debugged, and the software is simulated and debugged.
Key words：lift; PLC control; frequency control
目录
第一章绪论   1
1.1课题研究的背景及意义   1
1.2国内外电梯的发展状况   1
1.3 PLC控制系统与继电器控制系统的比较   1
1.4本文研究的内容   2
第二章电梯的概述   3
2.1电梯的基本结构   3
2.2电梯的基本功能及安全保护功能   3
2.3电梯的主要参数及性能指标考虑   4
2.3.1主要参数   4
2.3.2性能考虑   5
第三章电梯控制系统的硬件设计   6
3.1电梯系统模拟板图   6
3.2PLC的概述   6
3.2.1PLC的选型   7
3.2.2PLC的编程元件及编程语言   8
3.2.3PLC的工作原理   9
3.2.4输入/输出（I/O)分配表   9
3.3变频器的概述   10
3.3.1变频器的选型   10
3.3.2变频器的控制方式   11
3.3.3变频器的变频调速原理   11
3.4系统硬件原理图   12
第四章电梯控制系统的软件设计   13
4.1电梯系统的控制要求   13
4.2系统软件流程图   13
4.2.1电梯系统流程图分析   15
第五章电梯系统的调试仿真   17
5.1程序调试   17
5.2仿真结果   19
结束语   27
致谢   28
参考文献   29
附录A   30
第一章绪论
1.1课题研究的背景及意义 PLC控制的变频调速电梯系统设计+梯形图:http://www.751com.cn/zidonghua/lunwen_47748.html