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pxchj
可能是個(gè)菜鳥(niǎo)，僅此而已！
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樓主  發(fā)表于: 2020-01-31 22:41
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PLC是西門(mén)子200Smart,HMI是MCGS的TPC7062HI。目的是Modbus485通信（不是Modbus RTU485通信）
PLC串口的3、8腳分別是485A/B與HMI的COM口7(+)、8(-)連接后始終無(wú)法通信，相關(guān)設置如圖
請諸位指出我錯在何處，謝謝！
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1樓  發(fā)表于: 2020-02-01 17:03
驅動(dòng)的事，你現在用的是s7-200的驅動(dòng)，換上200smart的驅動(dòng)就可以了

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