The paper introduces the structure, theory and mechanism of data communication net in this system, especially RS232/RS485 passive level conversion module.
本文介绍了该系统中数据传输网络的组成、工作原理及数据传输机制，特别是设计独特的RS-232与RS-485之间的无源电平转换接口模块。
There are three approaches for protocol conversion: service level conversion approach, protocol level conversion approach and hybrid conversion approach.
规约的转换算法总的来说可以分为三类，即服务级转换方法、规约级转换方法和混合转换方法。
There are three approaches for protocol conversion: service level conversion approach, protocol level conversion approach and hybrid conversion approach.
规约的转换算法总的来说可以分为三类，即服务级转换方法、规约级转换方法和混合转换方法。
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