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宁夏理工学院PLC课程设计I摘要可编程控制器（PLC）是一种新型的通用控制装置，他将传统的继电器控制技术、计算机控制技术和通信技术融为一体，专为工业控制而设计，具有功能强、可靠性强、环境适应性好、编程简单、使用方便、体积小、重量轻、功耗低等一系列优点。PROFIBUS是一种国际化、开放式、不依赖于设备生产商的现场总线标准。PROFIBUS传送速度可在9.6kbaud~12Mbaud范围内选择且当总线系统启动时，所有连接到总线上的装置应该被设成相同的速度。广泛适用于制造业自动化、流程工业自动化和楼宇、交通电力等其他领域自动化。PROFIBUS是一种用于工厂自动化车间级监控和现场设备层数据通信与控制的现场总线技术。可实现现场设备层到车间级监控的分散式数字控制和现场通信网络，从而为实现工厂综合自动化和现场设备智能化提供了可行的解决方案。本设计介绍了PROFIBUS现场总线的有关慨念及技术协议，并阐述了其在废水处理工艺控制中的实际应用。关键词：可编程控制器（PLC）；PROFIBUS；现场总线标准；废水处理宁夏理工学院PLC课程设计IIAbstractProgrammablecontroller(PLC)isanewkindofcommoncontroldevice,hewilltraditionalrelaycontroltechnology,computercontroltechnologyandcommunicationtechnologyasawhole,designedforindustrialcontrolanddesign,ithasthefunctionofstrong,reliability,goodadaptabilitytotheenvironment,theprogramiseasy,easytouse,smallvolume,lightweight,lowpowerconsumptionofaseriesofadvantages.PROFIBUSisakindofinternationalization,openandnotdependentonequipmentmanufacturersfieldbusstandards.PROFIBUSshrinkagespeedcanbein9.6kbaud~12Mbaudrangechoiceandwhenbussystemstartup,allconnectedtothedeviceonthebusshouldbesettothesamespeed.Widelyusedinmanufacturingautomation,theprocessindustryautomationandthebuildingandotherareassuchastrafficpowerautomation.PROFIBUSisausedinfactoryautomationlevelandfieldequipmentmonitoringworkshopofdatacommunicationandcontrolofthefieldbustechnology.Theequipmentcanberealizedleveltotheworkshoplevelthedistributedmonitoringdigitalcontrolandthecommunicationnetwork,thustorealizetheintegratedautomationandfieldequipmentfactoryintelligentprovideafeasiblesolution.ThisdesignisintroducedthePROFIBUSfieldbussoupandthetechnicalagreementabout,andexpoundsitsinthewastewatertreatmentprocesscontrolinthepracticalapplication.Keywords:programmablecontroller(PLC);PROFIBUS;Thefieldbusstandards;Sewagetreatment宁夏理工学院PLC课程设计III目录摘要..................................................................................................................................................IAbstract..........................................................................................................................................II1PROFIBUS通信技术综述.....................................................................................................-1-1.1PROFIBUS概述...........................................................................................................-1-1.2PROFIBUS–DP概述....................................................................................................-1-1.2.1PROFIBUS–DP作用.........................................................................................-2-1.2.2PROFIBUS–DP系统配置.................................................................................-2-1.2.3PROFIBUS–DP系统行为.................................................................................-3-1.2.4DPM1和DP从站间的循环数据传输..............................................................-3-1.2.5DPM1和系统组态设备间的循环数据传输.....................................................-4-1.2.6PROFIBUS–DP的同步和锁定模式.................................................................-4-1.2.7PROFIBUS–DP的保护机制.............................................................................-4-1.2.8PROFIBUS-DP行规..........................................................................................-4-1.3PLC与主站...................................................................................................................-5-2PROFIBUS通信技术应用举例.............................................................................................-6-2.1废水处理系统现场总线控制......................................................................................-6-2.1.1废水处理系统现场总线结构型式....................................................................-6-2.1.2现场总线PROFIBUS控制的系统的配置.......................................................-7-2.1.3系统控制要求及控制方案的实现....................................................................-7-2.2废水处理的电气控制系统..........................................................................................-8-2.2.1SBR废水处理工艺的技术要求........................................................................-8-2.2.2SBR废水处理系统动力设备............................................................................-9-2.2.3SBR废水处理电气控制系统总体设计过程..................................................-10-2.3PLC控制电路设计.....................................................................................................-11-2.3.1硬件结构设计..................................................................................................-11-2.3.2PLC控制电路设计...........................................................................................-12-参考文献..................................................................................................................................-16-结束语......................................................................................................................................-17-宁夏理工学院PLC课程设计-1-1PROFIBUS通信技术综述1.1PROFIBUS概述PROFIBUS是过程现场总线的缩写，于1989年正式成为现场总线的国际标准。目前在多种自动化的领域中占据主导地位，全世界的设备节点数已经超过2000万。它由三个兼容部分组成，即PROFIBUS－DP（DecentralizedPeriphery）、