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china_1ysz
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樓主  發(fā)表于: 2008-12-02 20:51
請問(wèn)各位，在現在的工業(yè)控制中，有哪些比較常用的數據通訊協(xié)議？
ljc2008
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1樓  發(fā)表于: 2008-12-03 16:02
常用的協(xié)議分物理接口(硬件)和軟件協(xié)議二層來(lái)說(shuō)：物理接口為RS232和RS485標準串行接口，大部分控制設備(變頻器、伺服、步進(jìn)、溫控儀等)都配備有RS485接口，RS485標準串行接口是最常用的物理接口。軟件協(xié)議常用的是MODBUS標準協(xié)議，它規定數據通信格式和傳送方式，實(shí)際上很多控制設備都有自已的專(zhuān)用協(xié)議，有自已的數據通信格式和傳送方式，只要徹底了解MODBUS標準協(xié)議，對專(zhuān)用協(xié)議很快會(huì )領(lǐng)會(huì )掌握和應用。僅供參考
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