毕业实践任务书课题名称PLC控制的变频电梯系统的设计指导教师职称专业名称班级学生姓名学号课题需要完成的任务：电梯控制的基本思路是当电梯上升下降时，在上升下降的同时，要顾及到等待时间、加速时间，人性化的设计。在上升时，有人按了上升按钮，则要在经过的时候停止，开门；下降时亦相同。系统主要由变频器，PLC，曳引电机，按钮四部分组成。按钮连接PLC的I/O口，按下按钮的时候，PLC将信号转换为模拟信号，传给变频器，变频器改变曳引电机的转向。其中曳引电机的速度改变。主要完成任务如下：（1）三菱公司的FX2N-80MR-D模拟量扩展模块的程序设计（2）变频器控制的程序设计课题计划：x.x~x.x熟悉课题，准备资料；x.x~x.x设计硬件；x.x~x.x编写毕业设计论文；x.x~x.x准备毕业答辩。计划答辩时间：xxxx年x月x日~x日xxxxxx（分院、系部）xxxx年xx月xx日1外文翻译INDUSTRIALANDCOLLABORATIVECONTROLSYSTEMS-ACOMPLEMENTARYSYMBIOSIS–Lookingattoday’scontrolsystemonecanfindawidevarietyofimplementations.Frompureindustrialtocollaborativecontrolsystem(CCS)toolkitstohomegrownsystemsandanyvariationin-between.DecisionsonthetypeofimplementationshouldbedrivenbytechnicalargumentsRealityshowsthatfinancialandsociologicalreasonsformthecompletepicture.Anydecisionhasit’sadvantagesandit’sdrawbacks.Reliability,gooddocumentationandsupportareargumentsforindustrialcontrols.Financialargumentsdrivedecisionstowardscollaborativetools.Keepingthehandsonthesourcecodeandbeingabletosolveproblemsonyourownandfasterthanindustryaretheargumentforhomegrownsolutionsoropensourcesolutions.Theexperienceofmanyyearsofoperationsshowsthatwhichsolutionistheprimaryonedoesnotmatter,therearealwaysareaswhereatleastpartoftheotherimplementationsexist.Asaresultheterogeneoussystemshavetobemaintained.Thesupportfordifferentprotocolsisessential.Thispaperdescribesourexperiencewithindustrialcontrolsystems,PLCcontrolledturnkeysystems,theCCStoolkitEPICSandtheoperabilitybetweenallofthem.FUNCTIONALITYTheeverlastingquestionwhycontrolsystemsforacceleratorsandotherhighlyspecializedequipmentareoftenhomegrownoratleastdevelopedinacollaborationbutonlyinrarecasescommercialshallnotbeansweredhere.Wetrytosummarizeherebasicfunctionalitiesofdifferentcontrolsapproaches.Front-endControllerOneofthecoreelementsofacontrolsystemisthefront-endcontroller.PLC’scanbeusedtoimplementmostofthefunctionstocontroltheequipment.Thedisadvantageisthecomplicatedaccesstothecontrolsproperties.ForinstanceallofthepropertiesofacontrolloopliketheP,IandDparameter,butalsothealarmlimitsandotheradditionalpropertiesmustbeaddressedindividuallyinordertoidentifytheminthecommunicationprotocolandlastnotleastinthedisplay-,alarm-andarchiveprograms.Inadditionanykindofmodificationsoftheseembeddedpropertiesisdifficulttotrackbecausetwoormoresystemsareinvolved.Thismightbeone2strongargumentwhycontrolloopsaremainlyimplementedontheIOClevelratherthanPLC’s.I/OandControlLoopsComplexcontrolalgorithmsandcontrolloopsarethedomainofDCSalikecontrolsystems.Thesupportforsetsofpredefineddisplayandcontrolspropertiesisessential.Ifnotalreadyavailable(likeinDCSsystems)suchsetsofgenericpropertiesaretypicallyspecifiedthroughoutacompletecontrolsystem(seenamespaces).Sequence/StateprogramsSequenceprogramscanrunonanyprocessorinacontrolsystem.Theruntimeenvironmentdependsontherelevanceofthecodeforthecontrolsystem.Programsfulfillingwatchdogfunctionshavetorunonthefront-endprocessordirectly.Sequenceprogramsforcomplicatedstartupandshutdownprocedurescouldberunonaworkstationaswell...
