近年来，随着ＩＴＳ（智能运输系统）概念的提出，铁路信息化的进程大大加快了，信息流控制物流的时代已经到来。因此，如何使铁路系统中各种设备和进程控制满足信息化的要求，是一个亟待解决的课题。从实际应用来看，现场总线技术恰好为解决这个问题提供了良好的技术基础。铁? In recent years, with the introduction of the concept of ITS (Intelligent Transport System), the progress of railway informatization has been greatly accelerated, and the era of information flow control logistics has arrived. Therefore, how to make all kinds of equipment and process control in the railway system meet the requirements of informatization is an urgent issue to be solved. From a practical point of view, the field bus technology just to provide a good technical basis for solving this problem. iron?