1794-OB321794-OB321794-OB32下面用一个简单的例子来进一步说明PLC的扫描工作过程。图1-6给出了PLC的外部接线图和梯形图，起动按钮SB1停止按钮SB2和热继电器FR的常开触点分别接在编号为X0~X2的PLC的输入端，交流接触器KM的线圈接在编号为Y0的PLC的输出端。图1-6b是这4个输入／输出变量对应的I／O映像寄存器，图l-6c是PLC的梯形图，它与图1-3所示的继电器电路的功能相同。但是应注意，梯形图是一种软件，是PLC图形化的程序。图中的X0等是梯形图中的编程元件，X0~-X2是输入继电器，Y0是输出继电器。梯形图中的编程元件X0与接在输入端子X0的SBl的常开触点和输入映像寄存器X0相对应，编程元件Y0与输出映像寄存器Y0和接在输出端子Y0的PLC内部的输出电路相对应。备货，备货，降降降，火火火，火火火……————————————————————————————————公司名称：厦门泰尼电气有限公司联系人：小黄（销售代表）联系电话：0592-6809319传真号码：0592-6890859（麻烦备注01006收）手机：18950191386***号码:2917675397邮箱：2917675397@***.com诚信经营，质量为首，诚信至上，泰尼电气小黄竭诚为您服务！！！————————————————————————————————AllenBradleyCompactLogix1769-IT6Thermocouple/mVComNUMATICSPREFILTERCOALESCERF624D-12AUDATE0E6ELEMEABBI/OBOARDYB560103-BD/1DSQC223ABBREFURBISHEDSIEMENSDP/ASINTERACELINK20E6GK1415-AAA01BALDORDCMOTORCDP33261/2HP180V33-2051Z139FR56C1/2"0.50INFISHERBAUMANN32-24588S/ACONTROLVALVEFESTOPNEUMATICLINEARDRIVEUNITSLE-32-160-KF-A-G-S-YNSKSUPERPRECISIONBEARINGNN3011MBKRE44CC1P4VIATRANPRESSURETRANSDUCERXC2303XC23030-2000KPAG***CRODLESSCYLINDERML1C25G-500HVIATRANPRESSURETRANSDUCERXC2401XC24010-2000KPAGRENISHAWLINEARENCODERREADERX30F00ANOTINBOXALLENBRADLEYCIRCUITBREAKER140U-H3140U-H3C3-D12A1MoriSeikiGearG05108B1PG05-108B-1PMODICONPLCANALOGCARDAS-B875-102SN0055843/REPALLENBRADLEYRGUDCSUPPRESSORREPLACEMENTM003394081ALLENBRADLEYINPUTMODULE17941794-IA161794IA16SERTOKIMECVICKERSVALVEDG5V-7-6C-T-P2-T-82-JA1354825240SIEMENSSINUMERIK6FX1121-2BB02TIMKENFAFNIR2BEARINGSINONEBOXBALLSCREWSUPPORTMITSUBISHIFREQROLDRIVEZ120FR-Z120-0.4K3AMPVFDPARKERROTARYACTUATORPNEUMATICPTR206PTR206-1803F-AXPACKDRIVERAK-BX511dit1***CMY1H40-G2415-75MY1H40RODLESSCYLINDERDSPACEBACKPLANEDS0630-01BOARDDS0630HIOKI1172-822POINTPROBE117282NIBCONTROLTECHNIQUESMATADORDCSERVOMOTORDCM2B30/03KEYSTONEPNEUMATICACTUATORF79U-024U-K-S080DOUBLEACTMTSTEMPOSONICSRSERIESRHSRHS0110UD701S2G1100VIATRANPRESSURETRAN***ITTER2742744CUDH86EWENGLORZD6003LASERM18MOELLERCIRCUITBREAKERNS1-125-NA3PH125AGEFANUCIC600BF942KANALOGOUTPUTBOARDREFURBISHEDBYTRELECTRONICSENCODER101-00225CD100M10100225000210CARVERLABORATORYEQUIPMENTHYDRAULICJACKUNIT3912#3YOKOGAWAFINESERVPC10041AAAA4AXISDRIVETOKIMECVICKERSVALVEDG5V-7-6C-T-P7-H-84-JA1354828035ALLENBRADLEYBOARD8000KDBZ8000KDBZSEWEURODRIVEMOTORDFT71D4GEARBOXR60DDT71D428RPMNEKROMERTOOLBALANCER7230-0420-30LBYASKAWAMINERTIAMOTORRMSERIESUGRMEM-02MA2XE***CMXW16-150BGUIDEDSLIDECYLINDERMXW16150B***CMXWBTGPULPTECSPC-1000/ACOMMUNICATIONTERMINAL-TOUCHSCRFANUCPOWERSUPPLYA16B-1310-0010REBUILTQUICKSILVERCONTROLSSILVERNUGGETN3-E3-04-EEWHEDCOSTEPPERDRIVEIMC-2001-1-BACU-RITELINEARENCODERSENC150SENC150558115-10TELEMECANIQUEREADWRITETAGXGPXGP-B574230TYPEFFAFNIR2M***114WIDUMSUPERPRECISIONTHRUSTBALLBEARINGFoxboroAutoManualUnitAssemblyModelC0131MAOutputMODICONPLCTSXP57103M571X3PL7FAFNIRSUPERPRECISIONSET2M***112WICRDUL2M***112WICRCUTLERHAMMERPILOTLIGHT10250T34RREDSERIESA4120VASERVODYNAMICSLINEARMODULESD412-40FSD41240FETAMICMOVOMATIC99/1AIRTOELECTRONICCONVERTERMURATAMURATECMVL-STD-DOS-104MVL-STD-D0S-104CN8-G102PARKERL6658921153PNEUMATICDUALSOLENOIDVALVEK17590METSOMODULEAIR8CA413752METSOMODULEAOF2VA413767A0F2VFUJIELECTRIC2416PI/OMODULEFISHERROSEMOUNT3051CG5A02A1AH2B73051C-G5A02A1AH2B7UFUSIONUVSYSTEMSRFDETECTORRF-207534275342LOTOF3ALLEN-BRADLEY1756-OB32/ACONTROLLOGIXDCOUTNORGRENPROGRAMMABLEPRESSURECONTROLVALVEVP5110BJ111HORTON9103005H50P-1*1.750AIRPNEUMATICCLUTCH1.SIMPSONDUALSETPOINTCONTROLLER3344A/XA3344AIXA21MOORESIEMENSMODEL74SNH/FRSERIESPNEUMATICPOSITIONMITSUBISHIMELSECA7PUSPROGRAMMINGUNITNIBEXCELLONAUTOMATIONPCBD-FCC2215081-14REVDSN2749EXCELLONDUALAXISINTERFACEDAC-2206492-24REVES/NEXCELLONAMDDISKCONTROLLER206173-12REVD00950120-0MODICONQUANTUMPLCANALOGOUTPUT140ACO020004CHDANFOSSVFDADJUSTABLEFREQUENCYACDRIVEVLT5005PT2B20RELIANCEELECTRICDRIVERCARD0-51902NIB051902HUBBELLCAT#3003PN69483-226SSRSRESISTORITEM-1-1SCANVAEGTMARELBOARD810201OKPDJDSPACEDS4302CANINTERFACEBOARDDS4302-03SN15327-7SCHAEVITZSIGNALCONDITIONERCASPMC2291245-00)