选矿厂破碎S7-300PLC控制系统

河北联合大学轻工学院-河北联合大学QINGGONGCOLLEGE,HEBEIUNITEDUNIVERSITY毕业设计说明书设计（论文）题目：选矿厂矿石破碎S7-300PLC控制系统梯形图软件设计学生姓名：+++学号：+++++++++专业班级：++++++学部：+++++指导教师：+++教授2012年05月23日摘要I摘要选矿厂集中控制系统是指运用各种自动控制技术完成破碎筛分、磨矿分级、选别、脱水、过滤及精矿和尾矿的输送等选矿作业的控制系统。稳定性、准确性是系统必备的要素。该系统在工业生产中常以单片机或者可编程控制器（PLC）来完成控制功能。然而，以单片机实现的控制系统在安全、可靠及抗干扰的性能上要稍逊色于PLC。为此，在工业生产中大力开发使用PLC完成控制功能的选矿厂自动控制系统是非常必要的。本设计正是完成基于PLC为控制器的选矿厂综合自动化系统设计[1]。随着计算机、网络、数据库等相关技术的不断发展和完善，自动化系统得到极大的完善。本设计中以S7—300PLC为核心控制器，着重说明了选矿厂破碎和磨矿两个环节的控制流程、控制系统硬件配置、梯形图程序设计及整体系统的调试等情况。PLC的应用极大地提高了选矿产品的质量和生产效率，在整个选矿行业具有广阔的应用前景。关键词：选矿自动化，S7-300，PLC，破碎河北联合大学轻工学院IIAbstractConcentratorcentralizedcontrolsystemistheapplicationofautomaticcontroltechnologyreferstothecompletionofcrushingandscreening,grindingandclassification,sorting,dewatering,filtrationandtailingsconcentrateandmineralprocessingoperations,suchasthetransmissionofthecontrolsystem.Stability,accuracyisanessentialelementofthesystem.Thesystemisofteninindustrialproductionorasingle-chipprogrammablelogiccontroller(PLC)tocompletecontrol.However,single-chipcontrolsystemtoachievesafe,reliableandanti-jammingperformanceslightlyinferiortothePLC.Forthisreason,inindustrialproductionandvigorouslydeveloptheuseofPLCcontrolfunctionstocompletethespeedbatchingsystemisverynecessary.ThisdesignispreciselycompletesbasedonPLCiscontroller'soredressingplantsynthesisautomatedsystemdesign.Alongwiththecomputer,thenetwork,thedatabaseandsooncorrelationtechniquedevelopsunceasinglyandconsummates,theautomatedsystemobtainstheenormousconsummation.ThisdesignemphasizedtheSTEP7softwaretoselect,installment,trapezoidalchartprogrammingandintegratedsystem'ssituationsandsoondebugging.ThePLCapplicationimprovedtheproductqualityandtheproductionefficiencyenormously,hasthebroadapplicationprospectintheentiredressingprofession.KeyWords：Automationofmineralprocessing，S7-300，PLC，Fracture目录III目录摘要.............................................................................................................................IAbstract.........................................................................................................................II1绪论..........................................................................................................................11.1选矿自动化系统简介...........................................11.2选矿自动化的过程简述.........................................11.2.1破碎过程自动化.....................................................................................11.2.2磨矿过程自动化.....................................................................................21.2.3磁选过程的自动控制.............................................................................21.2.4浓缩过程自动控制系统.........................................................................21.2.5精矿传送控制系统.................................................................................22可编程控制器的介绍..............................................................................................42.1可编程控制器的概述.......................................................................................42.1.1可编程控制器的发展史.........................................................................42.1.2可编程控制器的特点.............................................................................42.1.3可编程控制器的分类............................................................................52.1.4PLC的应用领域....................................................................................62.2S7-300简介......................................................................................................72.2.1S7-300的硬件介绍................................................................................72.2.2S7-300的CPU模块..............................................................................72.2.3CPU模块的分类..................................................................................102.2.4S7-300PLC的功能及扩展能力...........................................................102.3PLC编程语言................................................................................................113选矿自动化控制系统总体设计方案....................................................................133.1总设计思想.....................................................................................................133.2选矿自动化控制系总体设计方案.................................................................143.2.1破碎过程自动化解决方案...................................................................143.2.2磨矿分级自动控制解决方案...............................................................174破碎系统..................................................................................................................234.1破碎工程的建立.............................................................................................234.2破碎阶段I/O端子的地址以及PLC内部地址（M）的分配....................254.2.1破碎环节I/O点数统计.......................................................................254.2.2破碎符号表...........................................................................................274.3破碎系统PLC程序.......................................................................................334.3.1破碎系统PLC