plc与变频器协同控制电机转速

沈阳理工大学学士学位论文I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KINGVIEW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；组态王沈阳理工大学学士学位论文IIAbstractPLCandtransducerisimportanthardwarewhichrealizeslongcontrolandimprovetheyieldinthefactory.PLC’SmeritsconsistthatweavingPLC’Sprogramsaren’tveryhard.Kingviewmakethefactorycanwatchandcontroltherunningfacilitiesbetweentheproducingprocesses,alsodealwithmatterswhichbreakoutinseason.Thekingviewhaspowerfulcontrolfunction,itsetteesupinterfacesveryeasy,itwritesprogramseasy,anditispropitioustousingfornovice.InthisdesigniscompletedonthebasesofknowingKINGVIEW,s7-200programmingsoftware,SIEMENSEMM420,transducerandUSScommunicationprotocol.ThisessaymainlymaterializesthatPLClinkedupwithtransducer,makinguseofUSScommunicationprotocol.Theycontrolledthespeedofelectromotor.FinallywewellrealizedtheinterfaceofkingviewandcanchangePLC’son/off,andthenwecansuperviseandcontroltheworkingmenuofelectromotor.Inthisessay,Iintroducethefactureofkingviewandtheparameter’ssettingofkingview,theapplicationofUSSprotocol,thewritingprocessofthePLC’sprogramandparametersetting,theparametersettingoftransducer,communicationbetweenPLCandtransducer,etc.Keywords:PLC;transducer;USScommunicatingprotocol;kingview沈阳理工大学学士学位论文III目录1引言......................................................................................................................................11.1课题背景及设计研究方向...........................................................................................11.1.1课题背景..........................................................................................................11.1.2设计研究方向..................................................................................................22PLC可编程控制器..............................................................................................................32.1可编程控制器梯形图编程规则................................................................................32.1.1编程的几个步骤..............................................................................................32.2S7—200的通信方式与通信参数的设置.................................................................42.2.1S7-200的通信方式..........................................................................................42.2.2S7-200通信的硬件选择..................................................................................42.2.3网络部件..........................................................................................................52.2.4使用PC/PPI电缆通信....................................................................................62.2.5计算机使用的通信接口参数的设置..............................................................72.3S7-200的网络通信协议............................................................................................72.3.1点对点接口协议..............................................................................................72.3.2多点接口协议(MPI)........................................................................................83变频器....................................................................................................................................93.1变频器介绍................................................................................................................93.1.1变频器面版图..................................................................................................93.1.2快速调试........................................................................................................103.1.3控制端子......................................................................................................124通信协议介绍....................................................................................................................134.1USS通信协议..........................................................................................................134.1.1USS协议的网络结构....................................................................................134.2采用通用的串行接口协议.....................................................................................144.2.1通讯报文的结构............................................................................................144.2.2USS协议有关信息的详细说明....................................................................154.2.3USS的物理连接............................................................................................17沈阳理工大学学士学位论文IV4.3MICROMASTER4有关USS通讯的参数设置..................................................184.3.1基本设定........................................................................................................184.4USS库中指令介绍..................................................................................................194.4.1USS_INIT指令..............................................................................................194.4.2USS_CTRL指令.....