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随着电子科学技术产业的发展和机载航电系统的革新,飞机上有大量的数据需要传输,因此各种各样的总线技术随之孕育而生。在这些机载航电总线中,RS422总线是目前应用最广泛的一种机载总线。通过描述KAM500机载RS422采集模块的主要特点及通讯反射问题,针对总线采集时容易出现的不同问题,采用各种措施对问题原因进行逐一排除验证,最后确定其原因所在,本文有助于类似问题的快速定位及排除。
With the development of electronic science and technology industry and the innovation of on-board avionics system, a large amount of data needs to be transmitted on the aircraft. Therefore, a variety of bus technologies are born. Among these airborne avionics buses, the RS422 bus is the most widely used on-board bus today. By describing the main features of KAM500 airborne RS422 acquisition module and communication reflection problems, aiming at the different problems that are easy to appear when bus acquisition, adopting various measures to verify the cause of the problem one by one, and finally determining the reason, this article contributes to similar problems Quick positioning and elimination.