DSAX452 实图售后优

描述

DSAX452

随着现场总线技术的出现和成熟，促使了控制系统由集散控制系统（DCS）向现场总线控制系统（FCS）的过渡。在一般的FCS系统中，遵循一定现场总线协议的现场仪表可以组成控制回路，使控制站的部分控制功能下移分散到各个现场仪表中。从而减轻了控制站负担，使得控制站可以专职于执行复杂的高层次的控制算法。对于简单的控制应用，甚至可以把控制站取消，在控制站的位置代之以起连接现场总线作用的网桥和集线器，操作站直接与现场仪表相连，构成分布式控制系统。

分布式的FCS系统比DCS系统更好地体现了“信息集中，控制分散”的思想。与传统的DCS相比，FCS有其自身的特点。FCS系统具有高度的分散性，它可以由现场设备组成自治的控制回路。现场仪表或设备具有高度的智能化与功能自主性，可完成控制的基本功能，并可以随时诊断设备的运行情况。另外，FCS的结构比DCS简化。有的FCS系统省略了DCS中控制站这一层，操作站直接与现场仪表相连。这些使FCS的可靠性得到提高。

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