ENTEK6652咨询***：18506919598PLC的工作原理[例1]．C200HPLC配置：4个8点输入模块+2个16点输入模块O、5个8点输出模块+2个16点输出模块、程序5K个地址(且仅使用LD、OUT指令，其执行时间分别为0.75、1.13μs)解：当编程器要在上面运行时：T=2.6+0.8+(0.75+1.13)/2×5.120+0.07×8+0.04×9=9.1ms没有外设：T=2.6+(0.75+1.13)/2×5.120+0.07×8+0.04×9=8.3ms系统响应时间PLC系统的响应时间是指输入信号有效后，到输出元件动作所需要的时间。所以系统响应时间的长短与系统的扫描周期、输入响应时间、输出响应时间有关。例如图2-8，如当SB接通有效后，直到与Y00对应的输出元件有效输出的时间即为该系统的响应时间系统***小响应时间若PLC在一次输入刷新前，输入点能建立起有效输入信号，现经扫描周期中程序的处理，经输出点输出，直到内部输出元件(J,SSR,T)给出有效的输出为止(见图2-9(a))，这种响应时间为系统***小响应时间。***小响应时间=输入响应时间+1个周期的扫描时间+输出响应时间系统***大响应时间若在输入刷新刚完成后，输入点才建立起有效的输入信号，则必须在下一周扫描周期的输入刷新时才能将这一信号写入I/O状态表。这种响应时间为系统的***大响应时间。(见图2-9(b))***大响应时间=输入响应时间+2个周期的扫描时间+输出响应时间如：输入响应时间为1.5ms；输出响应时间15ms；扫描周期10ms系统***小响应时间=1.5+10+15=26.5ms系统***大响应时间=1.5+2×10+15=36.5ms由以上分析表明：从外部输入触点动作有效到内部输出元件(继电器、晶体管、可控硅)的有效输出，响应延迟时间可长达2个多扫描周期，可达几十ms，这点对一般的应用场合无关紧要。但在某些特殊应用场合，这么大的***是不允许的，此时应考虑选用智能化的快速响应I/O模块或选用更高速的PLC机型。FANUCA20B-3200-0231/01ASYSTEMR-J34.6PROCESSINPUT/OUTPUTPCBOARDMITSUBISHIHC-SFS52BACSERVOMOTORNICEUSEDMOTORFANUCA16B-1210-0800/09BGRAPHIC/MPGGOODTAKEOUTDENISON701-00168-8SUPPLYAMPLIFIERGOODTAKEOUTFANUCA06B-6079-H203SERVOAMPLIFIERMODULEGOODTAKEOUTKUBLER/TURCKT8.5800.PPTY.2000.P1006ROTARYENCODERKLOCKNER-MOELLEREBE-221.1PROCESSOR4KGOODTAKEOUTTELEMECANIQUETSXDSF612OUTPUTUNITGOODTAKEOUTEMACSSP2-4300FPOWERSUPPLYINPUT115/230V60/50H26.2/3.1AGOODTAKEOFFNACHIUM795D(11-89100037)MEC-40V-0GOODTAKEOUTABBCP-E24/1.25POWERSUPPLYGOODTAKEOUTELECTRICCYLINDERCONTROLS5201MICROSTEPSDRIVESXSERIESUSEDTAKEOUTOKUMAE4809-770-033-1RELAYCARD1-1XLNTCONDITIONAMCI1761ENCODERMODULEUSEDGOODTAKEOUTMITSUBISHIQX084BBN634A574G52POWERSUPPLYMODULEALLENBRADLEY500-CO*930NEMASIZE2CONTACTOR110/120VOLTS50/60HZCOILSIEMENS6ES5921-3UA12PROCESSORUNITGOODTAKEOUTALLENBRADLEY6181-ACBBBBZZZINDUSTRIALCOMPUTEROPERATORINTERFACE.GOODTAKEOUVICKERSBDS422023615A36KOLLMORGENCINCINNATIMILACRONSERVODRIVEEGAN447438REV-4MEMORYBOARD256KGOODTAKEOUTB&RE163OUTPUTMODULEMDE163-1GOODTAKEOUTFUJI***AL***ME-070SER-4CHPULLEDFROMWORKINGMACHINEUSEDYASKAWACACR-SR03AD1KRY110SERVOPACKGOODUSEDTAKEOUTFANUCA06B-6058-H002SERVOAMPLIFERUSEDGOODTAKEOUTFANUCA16B-1210-0810/02AINPUTUNITPOWERSUPPLYXLNTTOSHIBAVT130G2+4015TRANSISTORINVERTOR1.5KVA1HPUSEDGOODTAKEOUTALLENBRADLEY7300UIA3CONTACTMONITORMODULENEWPORT2000BS-2DIGITALVOLTMETER,USEDTAKEOUTDOMINO24142HEADDRIVERGOODTAKEOUTCONTROLTECHNOLOGY2211(16120VACOUT)GOODTAKEOUTNACHISUA301CSERVOAMPLIFIERUNITWORKINGTAKEOUTMITSUBISHIAY11-ULMELSECOUTPUTUNITGOODTAKEOUTSTATICCONTROLSCORPORATION1180-S4-03-32-XGOODTAKEOURELIANCEELECTRIC0-52807(VSSAMODULE)GOODTAKEOUTSIEMENSREFUKL600606SPMPOWERBOARDGOODTAKEOUTFANUCA16B-1210-0210/02BGOODTAKEOUTTELEMECANIQUETSXDST1604OUTPUTMODULEGOODTAKEOUTLOADCONTROLSINCORPORATEDPFR-1700GOODTAKEOUTALLENBRADLEY7300-UIB1634174CONTROLBOARDGOODTAKEOUTABB2668180203/4(ASEADSDX110)CINCINNATIMILARCON3-531-4380ACONTROLBOARDGOODTAKEOUTFANUCA16B-2200-0020/03BBASE2BOARDREMAN.KLOCKNER-MOELLEREBE-200INPUTMODULEGOODTAKEOUTABBACS600INVERTERACN6441045600003300902874/A0300HZ.EXCELLENTGREATLAKESINSTRUMENTSMODEL452(115VOLT)SQUAREDSY/MAX8030CRM-511SY/NETNETWORKINTERFACEGOODTAKEOUTFANUCIC630PWR300APOWERSUPPLYGOODTAKEOUTISHIDAP5186A(DUBOARD)GOODTAKEOUTALLENBRADLEY634262REV-E10PCBBOARDRENANBYADVANCEDTECHNOLOGYSERVICESCINCINNATIMILACRON3-533-0341GREV.DBOARDEXCELLENTTAKEOUTFANUCIC693MDL330FOUTPUTMODULE8PTGOODTAKEOUTFANUCIC655BEM510CSERIESFIVEGENIUSBUSCONTROLLER(NEWINBOX)FANUCA06B-0373-B077MODEL02/3000ACSERVOMOTOR3000RPMGOODTAKEOUTDOMINO21418POWERSUPPLYGOODTAKEOUTFUJIVM1530PULLEDFROMWORKINGMACHINEEGAN435343MULTIPLEXERBOARDGOODTAKEOUTCROSFIELDELECTRONICS7602-115001MOTORDRIVELOGICBOARDSIEMENSREFULS933601SP01POWERBOARDGOODTAKEOUTUSEDXYCOMXVME-505/1(4CHANNELANALOGOUTPUT)GOODTAKEOUTMITSUBISHIGX21CN624E516H00MASTERBOARDGOODTAKEOUTCONTROLTECHNOLOGY22142AXISSERVOMODULEPARKERCOMPUMOTOR62502AXISSERVOCONTROLLERUSEDGOODTAKEOUTFUJIUMI5A-D14(I/OCARD)GOODTAKEOUTEGAN435341INTERFACEBOARDGOODTAKEOUTACCURAY67461-003PCBOARDEXCELLENTCONDITIONHONEYWELL30752381-001CENTRALPROCESSINGCARD*XLNT*CINCINNATIMILACRON001269582COUTPUTBOARDPCB-FSC-471-95CLEANBOARDFUJIFH1001I/OBOARDPULLEDFROMWORKINGMACHINEMITSUBISHIQX521CBN634A637G51GRAPHICSBOARDGOODTAKEOUT***TRONAMPLIFIERCARDA14702GOODUSEDTAKEOUTLUCIUS&BAERMC14MMG-EOPERATORPANELDISPLAYSCREENGOODTAKEOUTBAUMULLER3.9426BCONTROLBOARDGOODTAKEOUTGOULD55-1010-01CLXPOWERSUPPLYUSEDGOODTAKEOUTACTUSPOWERNPSA-2.5NF-50A-E2(NIKKI-DENSO)AC-200/220VGOODTAKEOUTALLENBRADLEY1746-OB32EOUTPUTMODULEGOODTAKEOUTFANUCIC693CHS398BBASE5SLOTEXPANSIONGOODTAKEOUTMITSUBISHIQX539BC1N634A524G51ACONTROLBOARDGOODTAKEOUTAQU***AR***2V40100DG&LPUMPCONTROLLER(10HP)GOODTAKEOUTMOTOROLAMVME712/MTRANSITIONMODULE*XLNTCONDITION*CINCINNATIMILACRON3-533-0264GSCCBOARDEXCELLENTTAKEOUTINGERSOLL-RAND99374449-99385759REV02PCBOARDREMANBYATSSERVICESALLENBRADLEY4100-RECSER.BRESOLVERTOENCODERCONVERTERGOODUSEDTAKEOUTCINCINNATIMILACRON3-533-0263GCPUBOARDEXCELLENTTAKEOUTALLENBRADLEY2755-DD1ABARCODEDECODERGOODTAKEOUTFUJIFH1002VIDEOC***OLEBOARDNACHIUM-870-10ROBOTCONTROLBOARDGOODTAKEOUTXYCOM9462INDUSTRAILCOMPUTERUSEDGOODTAKEOUTCROSFIELDELECTRONICS7609-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