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學(xué)悟之境
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樓主  發(fā)表于: 2023-01-19 20:48
請教各位前輩，有三菱FX3U-485BD板，怎樣和艾莫迅485轉模擬量模塊通訊，程序怎樣寫(xiě)。艾莫迅模塊支持MODBUS RTU。參數如下艾莫迅模塊，9600 8 無(wú) 1地址是1。寫(xiě)了好久和設置好久也沒(méi)有搞定。用過(guò)RS指令。FX3U也有，01 06 00 00 00 20和校驗碼，艾莫迅模塊沒(méi)有反應。求助，求助，感謝各位！
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mr荬籹籽
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1樓  發(fā)表于: 2023-01-19 21:13
先用串口助手配合USB轉485模塊，先確定PLC的程序有沒(méi)有正常發(fā)送數據，然后再用串口助手轉485模塊按照艾莫迅的通訊手冊進(jìn)行操作，確定都沒(méi)問(wèn)題了，那就是接線(xiàn)的問(wèn)題了。

一般都是用排除法，一步步找出問(wèn)題點(diǎn)進(jìn)行處理 。  很多都是接線(xiàn)或者是程序沒(méi)搞好導致的
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多謝多謝！

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