描述
就地总线或现场总线-般由双绞线组成的数据通信网络,由于其连接的设备是与生产过程直接发生联系的一次元件或控制设备,所以工作环境恶劣,故障率高,容易受到检修人员的误动而影响生产过程。另外,总线本身也会因种种原因造成通信故障。防止此类故障的有效措施是:首先要将就地总线与就地设备的联接点进行妥善处理。拆装设备时,不得影响总线的正常运行,总线分支应安装在不易碰触的地方,同时,就在总线最好是采用双路冗余酝置,以提高通信的可靠性。
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