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工控小艾33
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樓主  發(fā)表于: 2014-03-28 15:21
S7-300/400與海通達HTD-WR8003通訊
海通達HTD-WR8003工業(yè)無(wú)線(xiàn)通訊模塊助力西門(mén)子S7-300系列PLC實(shí)現工業(yè)遠程無(wú)線(xiàn)通訊
一、簡(jiǎn)介
 西門(mén)子S7-300系列PLC專(zhuān)業(yè)使用西門(mén)子自己的MPI、DP、以太網(wǎng)等通訊接口和協(xié)議,不直接支持modbus通訊協(xié)議,暫時(shí)不能與市場(chǎng)其他的工業(yè)無(wú)線(xiàn)通訊產(chǎn)品配套使用。如果自動(dòng)化控制系統現場(chǎng)布線(xiàn)不方便或只能走工業(yè)無(wú)線(xiàn)的通訊方式,有3種方式:
    第一:采用西門(mén)子自己的無(wú)線(xiàn)通訊產(chǎn)品,2.4G的技術(shù),傳輸距離有限,價(jià)格貴是弊端;
    第二:購買(mǎi)西門(mén)子CP340或CP341的modbus通訊模塊(價(jià)格在3500元左右),然后再買(mǎi)西門(mén)子modbus庫(價(jià)格在8000元左右),成本昂貴,通訊速度較慢是弊端;
   第三:將西門(mén)子S7-300系列的PLC與西門(mén)子S7-200系列的PLC連接,將西門(mén)子S7-300系統里面的通訊程序導到S7-200的CPU里面,然后通過(guò)S7-200系列的如:224XP(1500元左右,國產(chǎn)兼容800元左右)系列CPU與海通達HTD-WR8003或HTD-WR8005(傳輸距離0-20Km)等產(chǎn)品連接實(shí)現工業(yè)無(wú)線(xiàn)通訊,整個(gè)系統經(jīng)濟實(shí)惠,操作簡(jiǎn)單,通訊速度快等優(yōu)點(diǎn);

二、方案圖




    






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