1756-OB16E输出模块;1756-OB16E输出模块;1756-OB16E输出模块PLC是按什么样的工作方式进行工作的？它的中心工作过程分哪几个阶段？在每个阶段主要完成哪些控制任务？下面来回答这个问题：PLC是按集中输入、集中输出，周期性循环扫描的方式进行工作的。它的中心工作过程分输入采样阶段、程序执行阶段、输出刷新阶段。在输入采样阶段，首先扫描所以输入端子，并将各输入状态存入相对应的输入映像寄存器中，此时输入映像寄存器被刷新，它与外界隔离，其内容保持不变，直到下一个扫描周期的输入采样阶段。在程序执行阶段，PLC按从左到右、从上到下的步骤顺序执行程序。在输出刷新阶段中，元件映像寄存器中所有输出继电器的状态一起转存到输出锁存器中，通过一定方式集中输出，***后经过输出端子驱动外部负责，在下一个输出刷新阶段开始之前，输出锁存器的状态不会改变。LENZE9953212FNFP9953212TEXASINSTRUMENTSPLCPM550-410USPPPM550410ALLENBRADLEY1784-KTK1NSPP1784KTK1TexasInstruments500-2109TEXASINSTRUMENTSPLC305-25NNSFP30525NTEXASINSTRUMENTSPLC7MT-300NSFP7MT300ASEABROWNBOVERINF327-4PNSFPNF3274PCINCINNATIMILACRON3-531-2996AUSPP35312996APerceptronDSPFrameGrabber495-019196K495-0192500-0192*new/unused*GENERALELECTRICDS3800DMPCUSPPDS3800DMPCSiemens/TI575-2103CPUModuleVMEPLCTexasInstruments5752103TexasInstruments2493295-0002PanasonicACServoMotorM***082A4BFreeShipTEXASINSTRUMENTSPLCVPU500-3104USPPVPU5003104TexasInstruments505PowerSupplyRackw/AccessoriesTISiemens500-21515002151PowerSupply2151APLC,PictureprovideuponrequestTEXASINSTRUMENTS500-5114AREMOTEBASECONTROLLERMODULE5005114ATEXASINSTRUMENTSPLC500-4005USPP5004005ARO93969947USPP93969947ASEABROWNBOVERI57360001-HG/2USPP57360001HG2TOSHIBAVT130G2-4080USPPVT130G24080TEXASINSTRUMENTSSEQUENCECARD5TI-1023102-132VASEABROWNBOVERIYT212001-AMUSPPYT212001AMTEXASINSTRUMENTSPLCVPU-200-3104USPPVPU2003104ASEABROWNBOVERIE2N12BBHEB00EX​XNSFPE2N12BBHEB00EX​XSIEMENSTIPLCEXPANSIONRACK8SLOT6ES5-701-3LA12NEWTEXASINSTRUMENTSPLC505-7339NSFP5057339TEXASINSTRUMENTSPLC7MT-400USPP7MT400TEXASINSTRUMENTSPLC500-5023NSFP5005023TexasInstruments315-10TInput/OutputExpansionUnitASEABROWNBOVERI3BSE004940R1NSFP3BSE004940R1GEFANUCIC600BF814NSPPIC600BF814DELTATAUDATASYS3A0-602804-108NSPP3A0602804108USEDPerceptron96KDSPFrameGrabber495-0117-03TEXASINSTRUMENTS500-5047-A5005047ATEXASINSTRUMENTSPLC505-6851BUSPP5056851BTEXASINSTRUMENTSSiemensTIPN560-2126RemoteComModTEXASINSTRUMENTSPLC2490871USPP2490871PanasonicACServoDriverMDDDT3530003FreeShipASEABROWNBOVERI57287853USPP57287853TEXASINSTRUMENTSPLC505-4916USPP5054916PanasonicACServoDriverMSDA043A1ANewinBoxFreeShipPanasonicACServoMotor400WattNEWMFA040LB2BSAforStarSTARAutomationRoboTexasInstrument560-2120TexasInstruments500-2101SENSORIK4031NSPP4031MODICONMM-PMAB001NSFPMMPMAB001ASEABROWNBOVERIYB560103-ALUSPPYB560103ALTEXASINSTRUMENTSPLC505-6511USPP5056511TEXASINSTRUMENTSPLC505-7340NSFP5057340ASEABROWNBOVERI58094498USPP58094498(AB01)ACSERVOMOTORPANASONICMATSUSHITAELECTRICM***Z042B1EWORKINGMODICONALU151-1USPPALU1511ALLENBRADLEY1785-KA5NSFP1785KA5MODICONAS-P890-000NSFPASP890000ASEABROWNBOVERI086369-001USPP086369001PanasonicACServoMotorM***042N2NFreeShipACSERVODRIVERPANASONICMSD011A1XFreeShippingPanasonicMGDA093A1AACSERVODRIVERFreeShipPERCEPTRON911-0010ASEABROWNBOVERIYB161102-BUNSPPYB161102BUASEABROWNBOVERI3HAA3563-AHA/2USPP3HAA3563AHA2ASEABROWNBOVERI6205BZ10100KUSPP6205BZ10100KPanasonicACServoDriverMDDDT3530003FreeShipPanasonicMSD203A1VACServoDriverTEXASINSTRUMENTSPLC505-4032USPP5054032ASEABROWNBOVERIDSCA-190VUSPPDSCA190VPERCEPTRON9110021USPP9110021ASEABROWNBOVERIACS800-U1-0011​-5USPPACS800U100115ASEABROWNBOVERIEHDB-360C1USPPEHDB360C1TexasInstruments575-6660PowerSupply&575-2102CPUMODin14slotTIRackPanasonicServoDriver1kWMDD103A1VEFreeShipFLUIDPOWERDIVISIONPMC-10TUSPPPMC10TSIEMENS6ES5-943-7UA11USPP6ES59437UA11TEXASINSTRUMENTSPLC500-2114USPP5002114MODICONP2-984A-816USPPP2984A816TEXASINSTRUMENTSPLC565-1101USPP5651101ASEABROWNBOVERI1529F93A05USPP1529F93A05)