可编程序控制器，英文称programmablecontroller，简称pc。但由于pc容易和个人计算机（personalcomputer）混淆，故人们仍习惯地用plc作为可编程序控制器的缩写。它是一个以微处理器为核心的数字运算操作的电子系统装置，专为在工业现场应用而设计，它采用可编程序的存储器，用以在其内部存储执行逻辑运算、顺序控制、定时/计数和算术运算等操作指令，并通过数字式或模拟式的输入、输出接口，控制各种类型的机械或生产过程。plc是微机技术与传统的继电接触控制技术相结合的产物，它克服了继电接触控制系统中的机械触点的接线复杂、可靠性低、功耗高、通用性和灵活性差的缺点，充分利用了微处理器的优点，又照顾到现场电气操作维修人员的技能与习惯，特别是plc的程序编制，不需要专门的计算机编程语言知识，而是采用了一套以继电器梯形图为基础的简单指令形式，使用户程序编制形象、直观、方便易学；调试与查错也都很方便。用户在购到所需的plc后，只需按说明书的提示，做少量的接线和简易的用户程序编制工作，就可灵活方便地将plc应用于生产实践。梯形图：梯形图是通过连线把plc指令的梯形图符号连接在一起的连通图，用以表达所使用的plc指令及其前后顺序，它与电气原理图很相似。它的连线有两种：一为母线，另一为内部横竖线。内部横竖线把一个个梯形图符号指令连成一个指令组，这个指令组一般总是从装载（ld）指令开始，必要时再继以若干个输入指令（含ld指令），以建立逻辑条件。后为输出类指令，实现输出控制，或为数据控制、流程控制、通讯处理、监控工作等指令，以进行相应的工作。母线是用来连接指令组的。下图是三菱公司的fx2n系列产品的简单的梯形图例编码器信号输出主要有并行格雷码输出、串行ssi输出、总线型输出、模拟量4~20ma输出。并行格雷码和模拟量输出信号读取简单但不适合长距离传输，串行ssi输出大部分是与西门子plc的ssi模块配套成本较高。现场总线型编码器用通讯方式传输信号，信号遵循rs485的物理格式，连接线少，传输距离远，对于编码器的保护和可靠性就提高了。信号的接收设备只需一个接口，就可以读多个编码器信号，多个编码器集中控制的情况下可以大大节省成本。可编程控制器（plc）具有结构灵巧，硬件配置灵活方便、可靠性高、抗干扰能力强，易学易用的特点，已作为普遍的自动化控制器件广泛应用于各行各业。《plc原理及应用》课程已成为工科院校一门覆盖面较广的***课，作为学校如何培养出高素质应用型plc人才，这成为社会、学校、教师与家长关注的焦点。根据多年的教学实践，就影响plc人才培养的各个因素的提高与协同在plc软硬件设计和控制柜及现场施工完成后，就可以进行整个系统的联机调试，如果控制系统是由几个部分组成，则应先作局部调试，然后再进行整体调试；如果控制程序的步序较多，则可***行分段调试，然后再连接起来总调。调试中发现的问题，要逐一排除，直至调试成功。johnsoncontrolsnmt16/ad(nmt16ad)auto-dialnmt-201-0g4w-2212p-us-tv5-hp-dc24omrondpst-no15apcbrelayg4w2212pustv5hpdc24appliedmotionproductsamp3540mequalwithparkerofs350-dri,stepdriver.kineticsfluidsystemgasline,tescom150,usgmeterdgdgardnerdenveroperatorinterfacemodule,#s112470,siemensv7e3233wha***are100amp240vfusibleitevacu-breakpanelboardswitchfurnas22ds32ae6contactor22ds32a*e6w/48asd3m20overloadrelayseriesbnibsandpiper031-012-000sleeve&spoolmatchingset031012000nibfishercontrols14***70x072potbushingsferniceassembly78cbb453w049865***e39nxl154-gegenteq3/4hp208-230vx13furnaceblowermotor&module***car40-f06hdruckregler3/4"pressureregulatorreedswitchqm/34/5norgrenqm345acs50-culmotherboardlotofoldstock!mulberry2gangdeepboxesfive1/2hubs30593fuji2di150a-140transistormodule150a1400vtested!!![pz0]allenbradleyvers***iew1500w6189v-fd144afloppydiskdriveju-256a198pcsiemens6sl3211-0ab15-5ua1sinamicsg110cmp110aininopenboxk***nelesautomationhartdisplaytran***itterf4730005sarkoganeiv050le1-11square-typesolenoidvacuumvalvea***1021-472-01reducer-conical-nw40tonw16-lvhcrplcomroncqm1-ad041+cqm1-ips01oktested100%goodyearhy-tplusv-beltb85(lotof2)gefanuc44d220765-g02generalelectricpcbgeneralpurposegaterhpsinglerowballbearinglj1-7/8"borefreeshippingcbt-x210v.13b20,communicationpcbasphotos,sn:cbc20-k40sr-vp4xturckdemocapacitiveproximityswitchbc20k40srvp4x6no60amperite6vdc60sectimedelayrelay(1per)hblds6okuma/sanyodenkiservomotorw/d6encodercn-400t-21,datalinkcommunicationmodule,dl3500-dh+/df1,perkin-elmern068-9024fn068-9021dlgtconta/dconv/preampplcboardcardcincinnatimilacron3-531-4351apcboardhdco35314351asamsungbn94-08019amainboardforlh46uddpubb/za(versionrs01)wabcop55122relayvalvemod:4s,0-150,250psipressureswitch9012-acw-9squared9012acw9m12connecteurdebasemhp16l25ilmemhp-16-l25freewheelunitflsr-32-lfesto15688fuji6r1ti30y-080diode&thyristormodule30a800v---tested---fanuca20b-1000-0950cncpcbalfra030041psg4dinaluminumrailc-103pmcuttingunitr+wshaftcouplersk2/30/87/wa10-269758.1***cnvfs3410-5dsolenoidvalveyokogawaadmagmagneticflowdetectorae205dn,csqnidec934000alphavfanta1000,modela30205-10gespac03-322714a01pcbassy-dualserialcontrolsassemblyallen-bradley800t-p16tgreenpilotlight120vacsensus143-80serviceregulatorradiusvalveactuator120psig,ad-012withlimitswitchboxmodeles-900federaldimensionaireag221118000:1inspectiongauge56f0754hmitsubishihc-mf73,servomotorasphoto,sn:1032.dφmalf65cbk-ltpt1rabbinboxredpilotlightcbkltpt1rihd15-6521internationalpowerinbox15vdc6apowersupplyihd156521amat0200-10054,ringinner,aln,8inch,3mm,notch,wxzamat0190-08964factoryinterface3wide5.xhorizontalparker750-0030-10.75mmx16.30mmdiameterfastenerseal(lotof60)gefanucic300adc110banaloginputmoduleic300adc110nibrexnordlf879tk4.5tabletopchainlf879tk4-1/210fttotallengtheaton400ampfdpw365rfusiblepanelswitch600vfdpw-365rcutlerhammerarcchambersiemens3ty6-342-0a3ty63420a(4)geoverloadthermalunitheatingelementsc239afesto174001ventilinselmit2stück173940und1x173943undmurrcube67hitachi,ltdnes1-022sbinverter,200-240volt,1phase,3hp,10.0ampsyaskawausaded-13-yr21motors-acservoinvensystemperaturecontrol523e400150110amcinx1f4dnexusmultiaxissteppercontrollerw/devicenetoption&cablesplclandis+gyrsaiapca2.n1alimentatorenewa***16-329807c01retainer-gasline-5/6POSTTTIONamesmasterofmeasurementsgage345omrons8vm-01524adpowersupplys8vmcleancsqallenbradley440r-n23123msr126rniobsafetyrelayniob440rn23123bbdcsqlewaesc0000-15ecodossanitaryhygienicdiaphragmmeteringpumpmotor5valvestealthpanelmountmonitor15"sv-1500s-pmfagbearingp2livingstonsencab-86,resistanceweldmonitorsen***cables*nos*teradynemc860pn560116,inteli860xr,vmecpumoduleasphoto,sn:4322lφoe3s-5b4omroninboxphotosen***switche3s5b4e3s-5db4e3s-5lb4numaticsnag321404n00f150-759.5mmhgvalvewithdb-0502-u24v11wsolenoidcoilsiemenssinumerik810mservointerface,40mm,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