MCD3075-T5-C21-CV4模块;MCD3075-T5-C21-CV4模块;MCD3075-T5-C21-CV4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。ASEABROWNBOVERIDSCA-190VUSPPDSCA190VPANASONICAMKB400B20KAHACSERVOMOTORNEWASEABROWNBOVERIACS501-015-4-0​0P2USPPACS501015400P2PanasonicACServoDriver/MotorMSDA043A1AM***A042A1FTexasInstrumentsTI164(164-1111)TexasInstruments500-5022(AB01)ACSERVODRIVERPANASONICMATSUSHITAELECTRICMSD021PIEA01WORKINGCONTROLTECHNIQUES960154-01USPP96015401ASEABROWNBOVERI1953RAA0110009​0STDUSPP1953RAA0110009​0SPANASONICACSERVODRIVEMFDDTA390L013.0KWTEXASINSTRUMENTSPLCPM550-112USPPPM550112TexasInstruments560-2820CPUTI560-2820KEYENCECORPVG-035NSFPVG035TEXASINSTRUMENTS500-5848RACKI/O14MODULEBASEASSY.NO.2491573-0001EMCO301-MUSPP301MTEXASINSTRUMENTSPLC560-2126BUSPP5602126BPanasonicACServoMotorMFA100MB5NSA_MFA100MB5NSATEXASINSTRUMENTSPLC505-2510USPP5052510TEXASINSTRUMENTSPLC7MT-500USPP7MT500TexasInstrumentsRTU84502ModemBoardASPECT68040UNSPP68040UALLENBRADLEY8600-2158SUSPP86002158SNewPerceptronDigital917-4010DigitalSurfaceSensorSAJF//PANASONICMDDDT5540L01ACSERVOUSEDMODICONP2-984A-816USPPP2984A816ASEABROWNBOVERIHIEE300025R000​2NSFPHIEE300025R000​2Lotof5SIEMENSTITEXASINSTRUMENTSINPUTMODULE500-5011FISHERROSEMOUNTDM6001X1-KA15USPPDM6001X1KA15TexasInstruments500-5052ResistanceTempDetectorTIPanasonicACServoMotorM***A082A3SFreeShipALLENBRADLEY20AD022A3AYNAN​C0NSPP20AD022A3AYNAN​C0ELECTROCRAFTPDM10USPPPDM10TEXASINSTRUMENTSPLC530C-6202NSFP530C6202TexasInstrumentsPM550-416LoopAccessModuleASEABROWNBOVERI3AFE61004955USPP3AFE61004955TEXASINSTRUMENTSPLCPWB2490891-000​1AUSPPPWB24908910001​A530T-1112TexasInstrumentsTIPLCProcessor530T1112TEXASINSTRUMENTSPLC505-3516USPP5053516ASEABROWNBOVERI57088613USPP57088613CONTROLTECHNIQUESPCM-16USPPPCM16PERCEPTRON912-0013USPP9120013(AB01)ACSERVODRIVERPANASONICMASTSUSHITAELECTRICMSD011A1XWORKINGALLENBRADLEY1326AB-B420ES2​LUSPP1326ABB420ES2LASEABROWNBOVERIDSSR-110USPPDSSR110ALLENBRADLEY1336S-BRF50-AN​-EN4-HA2-L5NSFP1336SBRF50ANEN​41ASEABROWNBOVERIACH501-010-4-0​0P2USPPACH501010400P2PerceptronRepeaterEnclosureAssembly926-0127G2025TEXASINSTRUMENTSPLC7MT-210NSPP7MT210TEXASINSTRUMENTSPLCVPU-200-3104USPPVPU2003104OLECLT1USPPLT1PanasonicACServoMotorMHMD022G1UNIBFreeShipASEABROWNBOVERIQHMM101USPPQHMM101ASEABROWNBOVERI3DDE-300-400USPP3DDE300400NACHI/PANASONI​CMQM082Q9ACSERVOMOTOR3000RPM***NIB***Panasonic200WACServoDriveMSD021A1XUFreeShipASEABROWNBOVERINDCU-21CNSFPNDCU21CTITEXASINSTRUMENTS530-1104CONTROLLERPLCMODULEROCHESTERINSTRUMENTSYSTEMSCL-9001USPPCL9001NewTexasInstrumentsTI505-6840Siemens5056840ASEABROWNBOVERI5730030-DNUSPP5730030DNDYNAMATIC15-255-1410USPP152551410TexasInstruments575-6660PowerSupply&575-2102CPUMODin14slotTIRackREXROTH0-608-750-103NSFP0608750103SENTROL532-093-027USPP532093027SST5136-SD-104NSFP5136SD104PanasonicACServoMotorM***042AAAXFreeShipASEABROWNBOVERI57777290USPP57777290TEXASINSTRUMENTS560-2123560TPROCESS565TCPUPanasonicACServoDriverMDD103A1VVFreeShipASEABROWNBOVERIYB560103-CHNSFPYB560103CHASEABROWNBOVERIS4HQ250BRRAS4NSFPS4HQ250BRRAS4ASEABROWNBOVERI3HAB2242-1USPP3HAB22421OnePanasonicACServoDriverMSDA083D1A750WFreeShipTEXASINSTRUMENTSPLC5TI-3101USPP5TI3101TEXASINSTRUMENTSPLC505-6108ANSPP5056108AARO93970838USPP93970838ASEABROWNBOVERI57275847NSFP57275847MITSUBISHIMTA-100USPPMTA100)