5SHY3545L0009 3BHE009681R0101 现货！已测试OK

描述

5SHY3545L0009 3BHE009681R0101

减少信息往返是网络设计和系统组态的一条重要原则。减少信息往返常常可带来改善系统响应时间的好处。因此，网络设计时应优先将相互间信息交换量大的节点，放在同一条支路里。
减少信息往返与减少系统的线缆有时会相互矛盾。这时仍应以节省投资为原则来做选择。如果所选择系统的响应时间允许的话，应选节省线缆的方案。如所选系统的响应时间比较紧张，稍微减少一点信息的传输就够用了，那就应选减少信息传输的方案。
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。

典型系统比较
通过使用现场总线，用户可以大量减少现场接线，用单个现场仪表可实现多变量通信，不同制造厂生产的装置间可以完全互操作，增加现场一级的控制功能，系统集成大大简化，并且维护十分简便。

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