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cyh1986
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樓主  發(fā)表于: 2015-05-09 16:50
觸摸屏是flexem 2070的，plc是歐姆龍Cj2m cpu12,用的是本體自帶的串口，用普通232的直連線(xiàn)，屏可以和觸摸屏連上，現在要把觸摸屏移到15米外的地方，所以加了兩個(gè)研華的模塊，型號是Adam4520,走485,屏用232的線(xiàn)連模塊，plc也用232的線(xiàn)連模塊，中間走485線(xiàn)，現在通訊不上，plc的comm燈閃，模塊燈也上，就是屏上顯示plc無(wú)響應，請問(wèn)這是什么問(wèn)題

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