1783-BMS12T4E2CGNK

1783-BMS12T4E2CGNK

1783-BMS12T4E2CGNK

考虑到大多数数据都只需要在底层网络中传输，只有少数需要通过上层网络进行跨网络传输，因此，将整个通讯系统合理分层后，一方面可以合理隔离各层的网络通讯量，有利于提高各层通讯的实时性，另一方面也有利于网络的可靠性，通过分层可以有效隔离各层网络通讯故障，例如操作管理网络的故障不会波及到控制网络的正常运行。采用分层结构还有一个优点，那就是DCS厂商可以根据需要选择合理的网络拓扑结构和通讯协议，在满足整个通讯系统实时性和可靠性的基础上最大限度地降低成本，从而提高整个系统的竞争力，例如在图1操作网络层通过采用流行的标准工业以太网结构和TCP／IP通讯协议，有效提高了系统的开放性，与此同时，由于以太网非常便宜，因此使整体成本有效降低。需要注意的是，在这种分层体系中，连接不同网络之间的通讯装置的可靠性就成为一个关键因素，在可能的情况下选用高质量的标准网关。 

现货，现货，降降降，火火火，火火火……

现货，现货，降降降，火火火，火火火……

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◆ 企业名称：厦门泰尼电气有限公司

◆ 联系人： 小廖（女士）

◆ 电话：0592-6539066
   
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◆ 传真：0592-6890859

◆ QQ:1490371370

诚信经营，质量为首，服务至上，厦门泰尼小廖竭诚为您服务！！！

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