1762-L40BWAR模块;1762-L40BWAR模块;1762-L40BWAR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。ASEABROWNBOVERIYB560103-AMUSPPYB560103AM545-1101TexasInstrumentsSimaticPLCTI545TI5451101N300TEXASINSTRUMENTSPLCPM550-5040USPPPM5505040QUARTECH9800-AC-MN-1-0USPP9800ACMN10SIEMENS6ES5-701-3LA12NSFP6ES57013LA12TEXASINSTRUMENTSPLC5TI-1021-1USPP5TI10211PanasonicACServoDriverMDDDT55401.5KWFreeShipHOFFMANM13-0126-G1008USPPM130126G1008ASEABROWNBOVERI3HAB5956-1USPP3HAB59561OPTO22M4-RTUNSPPM4RTUXYCOMXVME-661NSFPXVME661SIEMENSSIMATICTI505PLCASEABROWNBOVERI68463815-PFNFP68463815PPanasonicMSDA1A311A50ACServoDriverTexasInstruments500-505632PT24/110VOutput5005056PanasonicMinasMQDZ023A1A200WattACServoDriverMotorDriveTEXASINSTRUMENTSPLC430-CPUNSPP430CPUASEABROWNBOVERIYTE-102CUSPPYTE102CTEXASINSTRUMENTSPLC505-CP5434--L2​-DPUSPP505CP5434L2DPASEABROWNBOVERI36562838USPP36562838ASEABROWNBOVERIYB560103-AC/8USPPYB560103AC8ALLENBRADLEY1771-TCMNSFP1771TCMSIEMENS6RA2203-8DK27-​1NSFP6RA22038DK271TEXASINSTRUMENTSPLC435-DC-CPUUSPP435D***UALLENBRADLEY2706-B43J31USPP2706B43J31PERCEPTRON310-0785-055MCABLE(RJ45),NNBTEXASINSTRUMENTSPLCPM550-400USPPPM550400505-6850ATexasInstrumentsSiemensSimaticTI505-6850-AR100MODICON140-ACO-020-00FNFP140ACO02000RAYTHEONB34120-00-02-1USPPB3412000021TEXASINSTRUMENTSPLC530C-6202NSFP530C6202REIS101122USPP101122ASEABROWNBOVERI58096067USPP58096067MODICONALU151-1USPPALU1511ASEABROWNBOVERIYT204001-AAUSPPYT204001AATEXASINSTRUMENTSPLC500-5047USPP5005047ASEABROWNBOVERI3BSE003390R1USPP3BSE003390R1ASEABROWNBOVERI3HAA3563-AHA/1USPP3HAA3563AHA1OnePanasonicServoDriverMADDT1207FreeShipWorldwideTEXASINSTRUMENTSPLC560-2127USPP5602127ExpeditedshippingailableTEXASINSTRUMENTSPLC505-7101NSFP5057101ALLENBRADLEY1326AB-B420ES2​LUSPP1326ABB420ES2LBAILEYCONTROLSINIPT-01USPPINIPT01ASEABROWNBOVERI3HAA2121-3NSPP3HAA21213TISiemensCTi500-2151-A5002151PowerSupply2151APLCTEXASINSTRUMENTSPLC560-2124NSFP5602124ASEABROWNBOVERIEH300C-1LUSPPEH300C1LTEXASINSTRUMENTSPLC505-4316AUSPP5054316APanasonicACServoDriver/MotorMSDA043A1AM***A042A1FBARBERCOLMANMP-9910USPPMP9910TEXASINSTRUMENTSPLC120-1112NSFP1201112TEXASINSTRUMENTSPLCPM550-100USPPPM550100ASEABROWNBOVERIYB560103-AMUSPPYB560103AMPERCEPTRON9110021USPP9110021(AG01)PANASONICM***011A1EECP-16A-11-J213​A-SPM***011AT7SERVOMOTORWORKINGPanasonicACServoDriverMSD043A1XXFFISHERROSEMOUNT2081-A-FFUSPP2081AFFTEXASINSTRUMENTSPLC505-4016AUSPP5054016AFISHERROSEMOUNT3051-CD3A02A1A​E5S5NSFP3051CD3A02A1AE​5SALLENBRADLEY284D-FHD6P0D-2​5-CR-3NSFP284DFHD6P0D25C​R3KEPCOJQE25-20MUSPPJQE2520MASEABROWNBOVERI05MA21USPP05MA21ASEABROWNBOVERIACS800-U1-0011​-5USPPACS800U100115TEXASINSTRUMENTSPLC500-2108USPP5002108PanasonicACServoMotorM***A102P1GFreeShipASEABROWNBOVERI57310001-SUSPP57310001STEXASINSTRUMENTSPLC500-2151USPP5002151OnePanasonicACServoDriverM***A013A1AFreeShipPerceptron140-0138ReplacementLaserModuleTEXASINSTRUMENTSPLC2490685USPP2490685MEASUREX05353500NSPP05353500TEXASINSTRUMENTSVPU500-3104VIDEOPROGRAMMINGUNITASEABROWNBOVERI57360001-HC/3USPP57360001HC3PanasonicACSERVOMOTORMUMS022A1E0S200WFreeShipPanasonicServoDriverMCDHT3520ENewinBoxFreeShipPANASONICACSERVODRIVEMDDA153D1A441.5KWSAFTRONICSCIMR-H11G2-E-1​0USPPCIMRH11G2E10)