Description
现在一些带现场总线的现场仪表本身装了许多功能块，虽然不同产品同种功能块在性能上会稍有差别，但一个网络支路上有许多功能雷同功能块的情况是客观存在的。选用哪一个现场仪表上的功能块，是系统组态要解决的问题。
考虑这个问题的原则是：尽量减少总线上的信息往返。一般可以选择与该功能有关的信息输出最多的那台仪表上的功能块。
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