1757-PLXCLNTCB模块1757-PLXCLNTCB模块s7-200的三种程序***单位（POU）指主程序、子程序和中断程序。STEP7-Micro/WIN为每个控制程序在程序编辑器窗口提供分开的制表符，主程序总是个制表符，后面是子程序或中断程序。一个项目（Project）包括的基本组件有程序块、数据块、系统块、符号表、状态图表、交叉引用表。程序块、数据块、系统块须到PLC，而符号表、状态图表、交叉引用表不到PLC。程序块由可执行代码和注释组成，可执行代码由一个主程序和可选子程序或中断程序组成。程序代码被编译并到PLC，程序注释被忽略。²²在“指令树”中右击“程序块”图标可以插入子程序和中断程序。数据块由数据（包括初始内存值和常数值）和注释两部分组成。数据被编译后，到可编程控制器，注释被忽略。系统块用来设置系统的参数，包括通信口配置信息、保存范围、模拟和数字输入过滤器、背景时间、表、脉冲截取位和输出表等选项。系统块如图1所示。²²单击“浏览栏”上的“系统块”按钮，或者单击“指令树”内的“系统块”图标，可查看并编辑系统块。系统块的信息须到可编程控制器，为PLC提供新的系统配置PLANARSYSTEMSEL640.400-C2USPPEL640400C2Returns:NotacceptedSIEMENS6SE6440-2AD27-​5CA1NSFP6SE64402AD275C​A1ASEABROWNBOVERI503349NSFP503349TexasInstruments100-3101ProgrammerTI101#7650Returns:Acceptedwithin7daysPanasonicACServoMotorM***082H4VFreeShipASEABROWNBOVERI57310001-S/4USPP57310001S4TexasInstruments305-02BSeriesRackwithPowerSupplyASEABROWNBOVERI1923RA00140000​0STDUSPP1923RA00140000​0SALLENBRADLEY1771-IFENSPP1771IFEASEABROWNBOVERI3HAB-2136-1/7USPP3HAB213617ARO93970309USPP93970309PanasonicACServoMotorM***A102A1G1kW220VFreeShipTEXASINSTRUMENTSPLC575USPP575TEXASINSTRUMENTSPLC555-1105USPP5551105ASEABROWNBOVERIDPH-15051NSFPDPH15051ALLENBRADLEY1336-B007-EJD-​FA2-S1USPP1336B007EJDFA2​S1TEXASINSTRUMENTSPLCTMM10010-05USPPTMM1001005PanasonicMDD153A1VEACServoDriverASEABROWNBOVERIDSQC-211NSPPDSQC211PanasonicACServoDriverMSD021A1X04FreeShipPanasonicM***022A1AACServoMotorNewinBoxFreeShipPACIFICSCIENTIFICR46GENA-TS-LS-​NV-02USPPR46GENATSLSNV0​2ASEABROWNBOVERIM3AA-100-LB-4NSFPM3AA100LB4PHOENIXCONTACTIBS-PLC5-DSC/I​-TNSFPIBSPLC5DSCITPanasonicMFA005LD2BPJTHKSXEX-485ACServoMotor50W3000RPM.16NMW/BearingUSEDPerceptron912-0045EMinicamSurfaceSensorALLENBRADLEY1336-B015-EDE-​L3USPP1336B015EDEL3SQUAREDMH36400USPPMH36400SIEMENS6FX1-120-2CA00USPP6FX11202CA00MITSUBISHIAJ71QLP21USPPAJ71QLP21FISHERROSEMOUNT3051-CD3A02A1A​E5S5NSFP3051CD3A02A1AE​5SPerceptron495-0294ReplacementCircuitBoardASEABROWNBOVERIDSQC-115USPPDSQC115NEWPERCEPTRON495-0191PCBOARDFRAMEGRABBER4950191SIEMENSTEXASINSTRUMENTSENHANCEDRUNTIMEKEYBOARDCONTROLLER2587716-8002ASEABROWNBOVERI3BSE008546R1USPP3BSE008546R1RELIANCEELECTRICKC170105-7USPPKC1701057ASEABROWNBOVERIYT213001-BAUSPPYT213001BASIEMENSTIPLCCONTROLMODULE6ES52524DB11BRANDNEWS5PerceptronFrameGrabberBoard495-0191-00#29410TEXASINSTRUMENTSPLC7MT-1300USPP7MT1300TEXASINSTRUMENTSPLC945145-0004-AAUSPP9451450004AAASEABROWNBOVERIACS800-U1-0011​-5USPPACS800U100115BARBERCOLMANA-60010-708USPPA60010708TEXASINSTRUMENTS500-5019WORDOUTPUTMODULENEW5005019PanasonicMFA180MB5NBACServoMotor1.8kW(weigh22kg)FreeShipTEXASINSTRUMENTSPLCVPU210-3105USPPVPU2103105PanasonicACServoDriverMSDA5A3D2A52FreeShipTexasInstrumentsModel510HandProgrammer2458740-1(AS01)MFA250LB2NLPANASONICACSERVOMOTORUSEDWORKINGFISHERROSEMOUNT2081-A-FFUSPP2081AFFFANUCA20B-2001-0060USPPA20B20010060PanasonicM***152A1GACServoMotorSIEMENS6FX-1120-3BC01NSFP6FX11203BC01MOOREPRODUCTS16201-1-7NSPP1620117ASEABROWNBOVERIEH450C-32VDC-TNSFPEH450C32VDCTPanasonicACServoMotorM***A102A1G1kW220VFreeShipTEXASINSTRUMENTSPLC2491940-0001USPP24919400001QTY1PanasonicACServoDriverMSDA015A1AFreeShipASEABROWNBOVERI52820083-LFUSPP52820083LFASEABROWNBOVERI57772158USPP57772158TEXASINSTRUMENTSPLC990-202-BUSPP990202BTEXASINSTRUMENTSPLC530-1104USPP5301104PanasonicM***042F2GEACSERVOMOTORNEWTEXASINSTRUMENTS30505BPROGRAMMABLECONTROLLERASSEMBLYSiemensTI530C-1104PLCController530C-1104PanasonicACServoMotorMHMD082P1C750WFreeShipALLENBRADLEY1336F-BRF50-AA​-EN-HCS2-LA2-L​A3-L4USPP1336FBRF50AAEN​HCASEABROWNBOVERIYT221001-LSUSPPYT221001LSTEXASINSTRUMENTSPLC500-7201USPP5007201)