论文部分内容阅读
1.传统的通讯方式在计算机的数据通讯中,目前大都使用串行通信方式,因此在设计串行通信接口时,主要考虑的问题是采用哪一种串行标准通信接口,采用何种传输介质,是否需要进行电平转换等问题。在选择好标准接口后要解决的问题,主要是通信控制芯片的选择,通信介质的选择,以及接口信号电平的调整等。而选择它们的原则是根据可靠性(误码率低)、通信速度、通讯距离及通道的抗干扰能力等来决定。而目前STD总线工业控制机的通讯模板多为
1. The traditional way of communication In the computer data communications, most of the current use of serial communication, so in the design of serial communication interface, the main consideration is the use of what kind of serial standard communication interface, using what kind of transmission medium , Whether the need for level conversion and other issues. After selecting a good standard interface to solve the problem, mainly the choice of communication control chip, the choice of communication media, as well as interface signal level adjustment. The principle of selecting them is based on the reliability (low bit error rate), communication speed, communication distance and channel anti-interference ability to decide. At present, STD bus industrial control machine communication template