随着半导体工业的迅速发展,计算机在各个领城里的应用也越来越广泛,特别是单片计算机的发展给工业检测和调节开辟了广阔的前景。在工业现场。人们往往对检测的结果不但需要就地显示,而且还需经过远距离传输,送到控制器或生成标准信号送给相应机构,如CRT显示器、数据图表绘图仪、应答式控制器等,这就使多级检测的通信连网显得尤为重要。对 With the rapid development of the semiconductor industry, the application of computers in various cities has become more and more widespread. In particular, the development of single-chip computers has opened up broad prospects for industrial inspection and adjustment. In the industrial scene. People often not only need to display the results of the test, but also need to go through long-distance transmission, sent to the controller or generate a standard signal to the appropriate agencies, such as CRT monitors, chart plotters, answering controllers, etc. The multi-level detection of communication networking is particularly important. Correct