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zzzer442
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圖片：
如題，我的PLC用的是三菱的RS2指令通過(guò)RS232串口發(fā)送接收數據，串口設置如圖所示。
我用電腦的通訊串口調試指令，發(fā)現RS2指令只能從PLC向電腦發(fā)送數據，但電腦發(fā)送數據給PLC的時(shí)候，PLC的內存沒(méi)有任何變化。
請各位不吝賜教！
sjm123
https://weike.fm/SyNGJc43f
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1樓  發(fā)表于: 8天前
先寫(xiě)RS 一條指令 在用串口助手軟件 測試一下 通了正常了   在寫(xiě)你需要的程序  
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