plc变频器协同控制电机转速毕业设计（论文）.doc

摘 要 PLC和变频器是工厂实现远程控制，提高生产效率的重要硬件。采用PLC的优点就在于PLC的程序编制过程不是很复杂。而组态软件又使得工厂在生产过程中能够远程监控设备的运行，能够及时有效的处理突发事件。组态王控制功能强大，界面创建简单，编写程序方便，有利于初学者使用。 本次设计是在熟悉KING VIEW 组态王、S7-200编程软件、西门子MM420变频器、以及USS通信协议的基础上完成的。本文主要体现了，PLC与变频器之间利用USS协议连接起来，共同控制电动机调速，最终要实现的是利用组态王的监控界面可以改变PLC的打开/闭合，能够监控电机的运转画面。文中重点介绍了组态王界面的制作及参数的设置、USS协议的应用、PLC程序的编写过程及参数设置、变频器的参数设置、PLC与变频器的通信等。 关键词：PLC；变频器；USS通信协议；组态王 Abstract PLC and transducer is important hardware which realizes long control and improve the yield in the factory. PLC’S merits consist that weaving PLC’S programs aren’t very hard. King view make the factory can watch and control the running facilities between the producing processes, also deal with matters which break out in season. The king view has powerful control function, it settees up interfaces very easy, it writes programs easy, and it is propitious to using for novice. In this design is completed on the bases of knowing KING VIEW, s7-200 programming software, SIEMENSE MM420, transducer and USS communication protocol. This essay mainly materializes that PLC linked up with transducer, making use of USS communication protocol. They controlled the speed of electromotor. Finally we well realized the interface of king view and can change PLC’s on/off, and then we can supervise and control the working menu of electromotor. In this essay, I introduce the facture of king view and the parameter’s setting of king view, the application of USS protocol, the writing process of the PLC’s program and parameter setting, the parameter setting of transducer, communication between PLC and transducer, etc. Keywords: PLC; transducer; USS communicating protocol; king view 目 录 1 引言 1 1.1课题背景及设计研究方向 1 1.1.1 课题背景 1 1.1.2 设计研究方向 2 2 PLC可编程控制器 3 2.1 可编程控制器梯形图编程规则 3 2.1.1 编程的几个步骤 3 2.2 S7—200的通信方式与通信参数的设置 4 2.2.1 S7-200的通信方式 4 2.2.2 S7-200通信的硬件选择 4 2.2.3 网络部件 5 2.2.4 使用PC/PPI电缆通信 6 2.2.5 计算机使用的通信接口参数的设置 7 2.3 S7-200的网络通信协议 7 2.3.1 点对点接口协议 7 2.3.2 多点接口协议(MPI) 8 3 变频器 9 3.1 变频器介绍 9 3.1.1 变频器面版图 9 3.1