6ES5706-2CB00控制器
价格:999.00
6ES5706-2CB00控制器6ES5706-2CB00控制器6ES5706-2CB00控制器PLC以微处理器为核心,具有微机的许多特点,但它的工作方式却与微机有很大不同。微机一般采用等待命令的工作方式工作。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。每一次循环扫描所用的时间称为一个扫描周期。对每个程序,CPU从条指令开始执行,按顺序逐条地执行指令做周期性的程序循环扫描,如果无跳转指令,则从条指令开始逐条顺序执行用户程序,直至结束又返回条指令,如此周而复始不断循环。PLC在每次扫描工作过程中除了执行用户程序外,还要完成内部处理、输入采样、通信服务、程序执行、自诊断、输出刷新等工作。PLC工作的全过程包括三个部分,即上电处理、扫描过程和出错处理。PLC工作的全过程可用图4所示的运行框图来表示。PLC通电后,CPU在系统程序的控制下***行内部处理,包括硬件初始化、I/O模块配置检查、停电保持范围设定及其他初始化处理等工作。PLC有很强的自诊断功能,PLC每扫描一次执行一次自诊断检查,确定PLC自身的动作是否正常,如电源检测、内部硬件是否正常、程序语法是否有错等。如检查出异常时,CPU面板的LED及异常继电器会接通,在特殊寄存器中会存入出错代码;CPU能根据错误类型和程度发出信号,甚至进行相应的出错处理,使PLC停止扫描或强制变成STOP状态。PLC运行正常时,扫描周期的长短与用户应用程序的长短、CPU的运算速度、I/O点的情况等有关。通常用PLC执行1KB指令所需时间来说明其扫描速度(一般1-10ms/KB)。值得注意的是,不同指令执行时间是不同的,故选用不同指令所用的扫描时间将会不同。若用于高速系统要缩短扫描周期时,可从软硬件上同时考虑。PLC周期性循环扫描工作方式的显著特点是:可靠性高、抗干扰能力强,但响应滞后、速度慢。BALDORIDWNM3611TUSPPIDWNM3611TFUJIELECTRICFRN050G11S-2UXFNFPFRN050G11S2UXRELIANCEELECTRIC0-55333-1USPP0553331PanasonicServoMotorM***022P1F200WFreeShipASEABROWNBOVERIYB560103-CB/10USPPYB560103CB10ExpeditedshippingailableTEXASINSTRUMENTSPLC55PL8312000328USPP55PL8312000328ASEABROWNBOVERIFDC86-UNIT1BNSPPFDC86UNIT1BOPCON2300A-7502NSFP2300A7502GENERALELECTRICDS3800HXPA1D1DUSPPDS3800HXPA1D1DASEABROWNBOVERI1912RA001100000STDUSPP1912RA001100000STEXASINSTRUMENTSPLC505-CP2572NSPP505CP2572ALLENBRADLEY160-BA01NPS1FNFP160BA01NPS1TEXASINSTRUMENTSPLC505-4732USPP5054732SIEMENSTI6ES5453-4UA12PLCNEWASEABROWNBOVERIACS601-0011-4-000B1500801USPPACS60100114000B2SQUARED8538-SCA44-V81-CFF4PITUSPP8538SCA44V81CFF4SIEMENSTIPLCOUTPUTBOARD6ES5-453-7LA116ES54537LA11PANASONICMSDA403D1AACSERVODRIVE4KWFreeShipASEABROWNBOVERI289B456A13NSPP289B456A13TEXASINSTRUMENTSPLC505-4132USPP5054132ASEABROWNBOVERI57510001-AUSPP57510001ATEXASINSTRUMENTSPLC500-5055NSPP5005055TITEXASINSTRUMENTSASCIIMESSAGEOUTPUT500-5022TEXASINSTRUMENTSPLC2497447-0001USPP24974470001ASEABROWNBOVERIACS6010095000B1200000USPPACS6010095000B12ORMECSACS19E/101BUSPPSACS19E101BTEXASINSTRUMENTSPLCRTU-8635-SSDUSPPRTU8635SSDPanasonicACServoMotorM***A082C1EFreeShipASEABROWNBOVERIRVS-6-100/120VNSPPRVS6100120V500-9912TITexasInstrumentsRedundantRemoteBaseController5009912N761TEXASINSTRUMENTSPLC0941370-8200USPP09413708200WESTINGHOUSENLE-770USPPNLE770TEXASINSTRUMENTS500-5005INPUTMODULELOT5005005TEXASINSTRUMENTSPLC500-5193USPP5005193TEXASINSTRUMENTSPLC100-3101USPP1003101SIEMENSTI505-4908PLCNEWASEABROWNBOVERIPSS105/181-500FNSFPPSS105181500FHONEYWELLR7510A-1005USPPR7510A1005TIGEAR35S15RNSPP35S15RTEXASINSTRUMENTSPLC6EA1710-0AA00-2AA1USPP6EA17100AA002AA1TexasInstruments500-5055ASEABROWNBOVERI57520001-UUSPP57520001UALLENBRADLEY1398-HMI-003USPP1398HMI003SAJF//PANASONICMSD021A1XACSERVODRIVEUSEDTEXASINSTRUMENTSPLC990/305USPP990305PanasonicACServoDriverMDDHT5540FreeShipALLENBRADLEY1785-L11BNSFP1785L11BYASKAWAELECTRICJANCD-HA03NSPPJANCDHA03ASEABROWNBOVERIYT212001-AGUSPPYT212001AGTexasInstrumentsRTU-M056-AMICROCONTROLLERRTUM056AASEABROWNBOVERIYXU-168EUSPPYXU168ETEXASINSTRUMENTSPLC505-6860USPP5056860ASEABROWNBOVERIOETL-NF1600SWUSPPOETLNF1600SWASEABROWNBOVERIMFE500341801004EHNSPPMFE500341801004EUSEDPerceptron147SerialBoard495-0102-01093097-003INDRAMATMAC090A-0-RD-3-D/110-A-0-S001USPPMAC090A0RD3D110ATISiemensCTi208016PT110VAC/DCInputPT.RevB.1PLCTEXASINSTRUMENTSPLCPWB-2599168-0001USPPPWB25991680001ALLENBRADLEY6185-CAAAAAZUSPP6185CAAAAAZASEABROWNBOVERI57310001-BYUSPP57310001BYTexasInstrument500-5016AnalogOutputModule530T-1112TexasInstrumentsTIPLCProcessor530T1112N6)