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crossingao
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樓主  發(fā)表于: 2015-02-02 23:28
各位大蝦，本人最近開(kāi)始調試PLC485串口通信，先在PLC中定義了485通信格式，波特率9600,7位，偶校驗，1停止位




但是，用串口調試的時(shí)候，發(fā)送：02 37 30 30 35 03 46 46   想強制Y0置位為1時(shí)，串口只收到00,485模塊上RD指示燈閃爍，是不是PLC程序中，關(guān)于通信的內容寫(xiě)的太少？
daizhi
一師一地一時(shí)一法
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1樓  發(fā)表于: 2015-02-03 11:26
你這看起來(lái)不像MODBUS協(xié)議
13025699308
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2樓  發(fā)表于: 2015-02-03 18:16
com1通訊接口

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