IC697BEM733IC697BEM733IC697BEM733当PLC运行时，是通过执行反映控制要求的用户程序来完成控制任务的，需要执行众多的操作，但CPU不可能同时去执行多个操作，它只能按分时操作（串行工作）方式，每一次执行一个操作，按顺序逐个执行。由于CPU的运算处理速度很快，所以从宏观上来看，PLC外部出现的结果似乎是同时（并行）完成的。这种串行工作过程称为PLC的扫描工作方式。用扫描工作方式执行用户程序时，扫描是从***条程序开始，在无中断或跳转控制的情况下，按程序存储顺序的先后，逐条执行用户程序，直到程序结束。然后再从头开始扫描执行，周而复始重复运行。PLC的扫描工作方式与电器控制的工作原理明显不同。电器控制装置采用硬逻辑的并行工作方式，如果某个继电器的线圈通电或断电，那么该继电器的所有常开和常闭触点不论处在控制线路的哪个位置上，都会立即同时动作；而PLC采用扫描工作方式（串行工作方式），如果某个软继电器的线圈被接通或断开，其所有的触点不会立即动作，必须等扫描到该时才会动作。但由于PLC的扫描速度快，通常PLC与电器控制装置在I/O的处理结果上并没有什么差别。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！！！————————————————————————————————DORRISGEARREDUCERMODELNo.12099.212RATIO8.3HP1SQUAREDTELEMECANIQUEALTIVAR7.5HPACDRIVE460VACSQUAREDALTIVAFLEX58KU54N4ACSPEEDDRIVE5HPPARKERPNEUMATICCYLINDER4"BORE38"STROKEBB2AUS14CALLENBRADLEY3HPACDRIVE1336-BRF30-AA-EN4SENSBAILEYDIFFERENTIALTRAN***ITTERPTSDDC1221001D0PICS29ALLENBRADLEY32OUTPUTACBLOCKI/OMODULE17910A3JOHNSONCONTROLSMETASYSAS-AHU-101-0DDCCONTROLLEBUSCHSECOTYPE3V-1040-B000-1NXXVACUUMPUMP3V1040SIEMENSSENTRONHND63F120CIRCUITBREAKER1200AMP1000WARRENRUPP2"FLUIDPORTTRANQILIZERMODELTA2125PSISQUAREDKI36175I-LINECIRCUITBREAKER175AMPPARKERSOLENOIDVALVE4532BD40ABAA53FISHERROSEMOUNTPROVOXI/ODRIVERCL7675X1-BA141***10TITERTEK52178TITANMULTIDROP384THERMOLABSYSTEMS83SQUAREDI-LINEAP-506G-10600AMP480V10'PLUGINBUSKEYENCELCDCOLORMONITORCA-MN81ITEBDSWITCHPLUGBOS16423100AMPS3PH4POLE24SQUAREDPQ4220GILINEFUSIBLEBUSWAYSWITCH200AMPSQUAREDPQ4620GBUSWAYSWITCH200AMP480V3PH4WIRSQUAREDI-LINE60AMP240VBUSWAYFBUSPLUG3ALLENBRADLEY1HPACVFD380/460VOLT1305-BA03A-ESSIEMENSBULLDOGBOS16423U100AMPBUSWAYFBUSALLENBRADLEY1336S-B010-AN-EN4DRIVE10HPDRIVE480VWATTSTOPPER***ARTWIREDLIGHTINGCONTACTORGERR7SQUARED400AMPMAINLUGI-LINEELECTRICALPANEL480Y/BELL&GOSSETT2DES3F4T1G1ASUBMERSIBLEPUMP2"FISHERROSEMOUNT***ARTDEVICEINPUTMODULEBOARD12P040ESILASERGALVODRIVERBOARDCKA67412GESPECTRAADS32200HS200AMPFUSEABLEPANELBOARDSWITALLENBRADLEY2707-L8P2XDATALOADERSERIESCDEZURIKKGCSTAINLESS3"ACTUATEDKNIFEGATEVALVE3MDIAMONDGRINDINGWHEELGENRBDW31798SIZE2A2T,93MDIAMONDGRINDINGWHEELGENRBDW31733SIZE2A2T,9ARNOLDWEILBURGSAUMSCHLIFFD91D15824866DIAMONDKRAUSSMAFFEICONTROLMODULESR-5015089435KPATENTSPROCESSINSTRUMENTSDTR-U-GPPROCESSREFRACTOFISHERPROVOXCOMMUNICATIONINTERFACECL7652X1-A1SIEMENS545-730OPENPROCESSORW/PROTOCOL1&2TEXTRONGEARREDUCER5:1RATIO1750RPMHHU40-1PARKERHYDRAULICPUMPMOTORM2B-90631-02CAL-VALANGLECOMBINATIONPRV2"PRESSUREREDUCINGWESTINGHOUSE800AMPLOWVOLTAGEPOWERCIRCUITBREAKER***TRONADDVANTAGE-32DCDRIVECONTROLLERDC0030-4BL0-BEXACMASSFLOWTRAN***ITTER115/230VOLTAC8300EXGESTATICFREQUENCYRELAY12SFF31A1AABB20HPVFDDRIVEACS501-020-4-00P2440-500VACGRISWOLD3HPSELF-PRIMINGPUMP3-1/4X2-1/8182JMFLOWPRODUCTSPACOPEDESTALSUMPPUMP45-20950-44XX...CUTLERHAMMER600AMPFUSIBLESAFETYSWITCHDH326FGBTOSHIBA10HPACVFDDRIVEVT130E2U4110VOLT480DURAKOOLDFC3-301MERCURYDISPLACEMENTRELAY150AMPERCEPTRONTUNNELMOUNTREPEATER926-0127-01UNISYSUM4100ALARMMONITORINGSYSTEMFORREMOTELOWESTINGHOUSESIZE3STARTERMCC***ET100AMPHMCP100GRUNDFOSC650006P1STAINLESSSTEELPUMP3PH2.95HP240ORMECSERVOMOTORMAC-DB100P/ATHOMSONATR014-040-6890ADEPTBINDICATORSSERVOAMPLIFIERDRIVE10300-15400EDWA***BAROCELVACUUMPRESSURETRANSDUCERW6D04181SYMBOLBARCODESCANNERANDCHARGINGBASEPDT6800-NOS640METTLERTOLEDOSTAINLESSPLATFORMSCALE240LB30X24KRAUSSMAFFEICONTROLMODULEPR-2025089180GEFBUSPLUG100AMP240VOLT3PHASEDE423RSQUAREDTVS4EBA12ASURGELOGICSURGEPROTECTIVEDEVICETYCORACK&PINIONACTUATORMRP-025U-K-D000WITHKEFORCECONTROLTWOSPEEDDRIVEMODELT2146BB86JOHNSONCONTROLSCONTROLBOARDMETASYSAIRHANDLINGCUTLERHAMMERSIZE3NON-FCOMBINATIONSTARTER600NEXENEN40-1A-VELECTRO-PNEUMATICCONVERTER0.0-5.7PSIMINARIK180VDCDCMOTOR1.5HP1800RPM7.0AMP504-3HARRINGTON1/2TONCHAINHOIST208-230/416-460VAC1670GENERALELECTRIC225AMPMAINLUGPANELW/VOLTAGESURGAIRPRODUCTSDEEPPURGEPIGTAILAPTECHMKSAP3000FANUCACSERVOMOTORTYPEA06B-0502-B754MODEL20SCSII/NET7716-CPCUPROCESSCONTROLUNITABBAX460PH/REDOXANALYZERAX400PECPROCESSELECTRONICSCORPORATIONSCRRECTIFIERALECTROUPS1000NUPSBATTERY1BACK-UPPOWER1KWFISHERROSEMOUNTPROVOXCIACARDDH7001X1-A3&CL7651X1PEERLESSPUMPF-B075USMOTOR5HPFRAME184JM1745RPMSIEMENSSENTRONHMD63F800CIRCUITBREAKER800AMP800ASQUAREDPQ3620GBUSWAYSWITCH200AMP600V3PH3WIRSYLVANIAUNELEC500AMPCIRCUITBREAKERSJK-3-C-500RONNINGENPETTER2"STAINLESSCARTRIDGEFILTERSS-7)