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樓主  發(fā)表于: 2016-06-15 12:46
求教：以前做過(guò)用VB做的通過(guò)編程電纜和三菱PLC通訊，實(shí)現置位復位，和D的讀寫(xiě)。
請問(wèn)要是我想讀儀器內比如壓力值.我按照儀器讀的指令，先把報文碼按照ASC表改成16進(jìn)制數，然后發(fā)送。
然后我就可以在PLC編寫(xiě)的接收地址中收到儀器發(fā)回的數據是嗎？
數據是個(gè)報文格式，我按照儀器相應的指令格式，找到壓力數據的起始數據存儲器。然后還要把字符串轉換成實(shí)數。
哪里不對的，求高手指點(diǎn)下。
mqgmqg
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1樓  發(fā)表于: 2016-06-15 13:39
232？ 西門(mén)子通信口是485的

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