1794-TB31794-TB31794-TB3目前PLC与PC机的链接通信有两种方式，一种是PC机始终处于主导地位，数据的传送都由PC机定时发出命令，另外一种是PLC始终具有优先权。在本电梯模型监控系统中所有的控制信号均为开关量信号，考虑到上位PC机仅实时显示电梯的运行状态，不需向PLC发送控制指令，采用第二种通信方式。利用PLC循环扫描的特点，设备状态一旦改变，PLC立即检测到，并将反映系统状态变化的数据存入指定的数据缓冲区，通过XMT发送指令，将数据通过COM口发至上位机。每个系统的状态对应于数据缓冲区中的一个指定字节，所存储数据均为16进制数据，为保证通信过程的可靠性，上位机对所接受到的数据进行首尾字符校验，如果校验成功，则说明接收到的首末字节之间的数据是正确的，从而进行处理，否则，放弃这批数据，要求对方重发。◆企业名称：厦门泰尼电气有限公司◆主营业务：DCS,PLC◆经营模式：贸易◆贸易地区：***◆联系人：小黄《女士》◆电话：0592-6809319◆手机：18950191386◆***:2917675397◆传真：0592-6890859（备注“01006”收）◆E-mail：2917675397@***.comJOHNSONCONTROLSV-3754-1010PARKER95930S3PX4VERIFLO4500813SIEMENSHF363HE***YDUTYSAFETYSWITCHGE9T51B0010TRANSFORMERIMAJEA35355/BPROXIMITYPHOTOCELLHARDYINSTRUMENTS1211BEN-10KBBALDORRELIANCEBE-1191.5HPMOTOR3PHASE1725RPMAllenBradley190S-AND2-CB16CCompactStarter190SAND2CB16CSQUARED9422ARR11HANDLEASSEMBLY9422-ARR11OMRONDRT2-MD16TA-1TERMINALDEVICENETGIDDINGS&LEWIS502-02819-01DIGITIZINGMODULEVOGELWS35-2-230FLOATSWITCHKUNKLE6010FE011''VALVECECLASACLA-240W1.030POWERSUPPLYCLA240W1030INDRAMATMODULEMOK10109-0725-4B04-00WARNERKUGELGEWINDETRIEBBALLSCREWRM-4005-UFMINARIKELECTRICRG400UADRIVEBOARDMERLINGERIN29338COMPACTNSSWITCH00994551ASEMITOOL14893BOARDTIMKENBEARING39243DETYPEE27/16VICKERSDGMR1-3-PP-FK-B-40TEACCORPORATIONSD-340HARDDRIVEDURANTEATON6-Y-1-2-RMF-PM-115VACCOUNTER6Y12RMFPM115FIREYEMC230INBOXADAPTIVEMICROSYSTEMSPPD220REDDISPLAYPANELMICROMOTIONDRT1NA1CAFLOWMETERRossControlsW7077***331SolenoidValveSimco302GStaticNeutralizingEquipmentBEI924-01079-169INDUSTRIALENCODERH25E-SS-10GC-7273-***14/19SACCUTRAK1000/2000WESTLOCK2036068476321-1HCV-0205-40858.01BaileyControlsNTMF01TerminationModuleASSY.#6635336E1PROPORTIONAIRBB1ME100PRESSURECONTROLVALVEHONEYWELL4DP7APXDHIIIPCBOARD3SwagelokSS-16-VCR-1FemaleNutSS16VCR1BENTLYNEVADAPVISOLATED4-20MAI/OMODULE136294-01SCHNEIDERAUTOMATIONTSXDMZ28DTKMODULEREXROTHVT11025-A13AMPLIFIERMODULEVT11025A13TURCKELEKTRONIKBI50-CP80-VP4X2-H1141SENSORBI50CP80VP4X2H1141RELIANCE0-51881-3PRINTEDCIRCUIT12SIEMENS5SX2101-7CIRCUITBREAKER5SX21017TOCCOD-209518PCBOARDD209518COMPUTARH0425S4MMTVLENSPROCON104E240F11BC070PUMP1THKSRS15MUU+368LMLINEARRAILBEARINGALLENBRADLEY440N-C02079FERROCODESWITCHACTUATOR440NC02079ELECTROLM-4614NVXMOTOR1/2HPM4614NVXSIEMENSSIMATIC505-6851AMELCHERLM3000AC-DC/DC-DCCONVERTERLM3644-7***CMXQ16-30CSSLIDETABLECYLINDERMXQ1630CSFERROMAGNETICSCORPMPDEL#CJ-44PCBOARDPART#PEPCB46-12***CMXQ6L-50CSSLIDETABLECYLINDERMXQ6L50CSGEFANUCIC600BF830KCONTROLBOARDGENERALELECTRICIC600YB943BPCBOARDKAWASAKI9ZT-30PCBOARDBARKSDALECD1H-H18SSPRESSURESWITCHALLENBRADLEY1746-A10RACKDYNAPARRA15141PABB2100RATEINDICATORPHIHONGPSA-110-401POWERSUPPLY)