140CPU43412U

140CPU43412U

140CPU43412U

由于以太网在重负荷下的低效率，应特别注意有效降低以太网的通讯负荷，尤其是在控制层使用以太网结构时。与控制网络相比，虽然操作层网络的实时性要求要低得多（一般来讲，由于人的视觉影响，操作画面数据刷新速度不宜高于1秒，否则操作人员容易疲劳），但是以太网由于具有传输不确定性的固有缺点，有效降低其通讯负荷总是有益的，为此可以采用三种办法，首先是采用更高速的以太网，譬如100Mbps快速以太网；其二是采用交换式以太网代替共享式以太网，以避免碰撞域，从而提高传输效率，典型代表就是MCS公司的MAX1000+系统；其三就是采用合理分段技术。这三种方法都各有其特点，在现有DCS中都得到了体现，鉴于前两种方法大家已经熟悉，这里就不再赘述，这里只简单讨论了第三种情况。

＆ 公司全称  ： 厦门泰尼电气有限公司

＆ 销售代表  ： 小黄

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＆ 公司地址  ：  厦门市海沧区海沧街道滨湖一里7号

＆ 公司网址  ：  

www.xmtaini.com

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