5X00070G03现场总线技术的应用 　　

1. 什么是现场总线 　　

现场总线是在智能测量和控制设备之间的数字、双向、多站式的通信链路，它以局域网LAN的形式，为*过程控制、远程输入/输出和高速工厂自动化应用提供服务。现场总线不仅是一条总线，它同时还是一个系统。现场总线传输的信号是数字信号，现场总线技术是对自动化仪表和控制系统的一场革命。 　　

2. 5X00070G03现场总线与传统常规仪表的主要区别 

3. 现场总线的优点 采用现场总线的优点不仅仅是节省电缆，zui主要的是现场总线设备的自诊断和故障预警信息有利于及时发现故障，使故障未发生时就能得以消除，故障发生时能及时定位、及时处理，有效地节省装置的运行费用和维修费用。例如：调节阀的详细自诊断信息中包含了阀门的磨损信息，所有调节阀的状况可以一目了然，从而可以减少大修时拆卸调节阀的数量。 

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