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阿Q吧 > 西门子plc300。MPI多点接口和RS485接口的关系?MPI用的是485的协议？谢谢

西门子plc300。MPI多点接口和RS485接口的关系?MPI用的是485的协议？谢谢

2025-03-16 06:51:53

推荐回答（2个）

回答1：

MPI用的是Profibus-DP协议，485是接口，是用来物理连接的，传送高低电平的。而协议则规定了这些高低电平的含义。比如你会写英文单词，但还要按照一定的格式、语法规则才能组成句子，这儿的语法就相当于协议。
PLC300，太贵了，用rect PLC代替吧。

回答2：

你可以上技成培训去找找看。

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