HXN5型内燃机车采用分散型微机处理机控制系统以微型机为核心,采用单元组合方式,根据不同需要灵活组合成1个完整系统,智能显示器DS1、DS2、DS3通过使用串联的ARCNET网控制机车上所有其他计算机和功能模块的运行,所有模块之间通过该网络实现采样数据共享,分级控制。本文介绍了HXN5机车ARCNET网络结构和控制原理,并根据典型的故障现象,总结了几种有效的故障处理经验和方法。 HXN5 Diesel Locomotive uses decentralized microcomputer processor control system to the microcomputer as the core, the use of unit combinations, according to different needs of a flexible combination of a complete system, intelligent display DS1, DS2, DS3 through the use of series ARCNET network control locomotive All other computers and functional modules run, all the modules through the network between the sampling data sharing, hierarchical control. This paper introduces the ARCNET network structure and control principle of HXN5 locomotive, and summarizes several effective troubleshooting experiences and methods according to the typical fault phenomenon.