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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！
zggk117
天道酬勤；人道酬善；商道酬信；
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1樓  發(fā)表于: 2020-02-01 09:08
串口端口號   設置為0   COM1    試一試

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