基于PLC六层电梯控制系统的设计.doc

毕业设计(论文)中文摘要基于 PLC 六层电梯控制系统的设计摘要:随着城市的发展,人们的住房也越来越趋向于高层建筑,电梯的控制尤为重要。本课题是以 PLC 为核心的六层电梯控制系统的设计,选用了西门子 S7-200 型的 PLC 。本文将电梯控制系统分为逻辑控制和速度控制系统两个部分来完成, 通过 PLC 处理旋转编码器输出的脉冲信号来控制变频器以实现电梯的上下行和变速自动控制。用西门子编程软件来进行编程并通过仿真调试来达到控制要求,从而使电梯的运行舒适并且安全。关键词: 电梯; PLC ;变频器毕业设计(论文)外文摘要 T he design of six-layer elevator control system based on PLC Abstract : With the development of the city , more and more people tend tobe high-rise housing construction . So the elevator is particularly important now. This issue is the design of six-layer elevator control system based on PLC and here isa selection of Siemens S7-200 .plete the design, t his paper has been divided into the elevator control system logic and speed control system . This elevator control system use PLC to deal with pulse e from rotary encoder , and then the frequency converter has been controlled to realize uplink or downlink and speed changing . Programming with the Siemens programming software and reaching the requirements by simulation and debugging. Thus it can make the operation of the fortable and safe. Keywords : elevator ; PLC ; frequency converter 目录 1绪论.......................................................................................................................... 1 电梯的发展........................................................................................................... 1 课题的主要内容................................................................................................... 1 电梯的控制要求................................................................................................... 1 2电梯控制系统的硬件设计...................................................................................... 2 电梯控制系统主电路和控制电路设计............................................................... 3 I/O 端口设计和 PLC 的选型............................................................................... 4 旋转编码器的选型............................................................................................... 8 变频器的选型...