D520BC10
D520BC10
D520BC10
7)通讯处理器和控制处理器分离。在一些系统中,控制处理器和通讯处理器是完全两个独立的处理器,二者各司其职,不存在相互影响,这样即可以确保控制单兀的控制算法的响应速度,同时又可以保证网络通讯的实时性和安全性,避免因网络通讯故障导至控制响应速度变慢或者因控制算法复杂而影响网络的有效传输。
除此之外,采用开放性的网络拓扑结构和通讯协议也是提高整个系统可靠性的重要措施。在早期DCS系统中,由于普通网络系统和通讯协议很难满足要求,许多厂商都开发了专有通讯系统和通讯协议,但其大缺点就是其性,厂商之间相互封闭,其可靠性需要厂商自己不断完善和发展,因此导致开发成本很高。随着计算机网络技术的迅猛发展,IEC8802.x,((与人们熟悉的IEEE802.x标准相对应)系列标准相继推出,通用计算机网络的性能和可靠性不断提高,而价格迅速下降。在这种趋势下,主要DCS厂商都纷纷放弃发展自己独有网络产品的做法,转而采用通用计算机网络结构和相关软硬件产品。
& 公司全称 : 厦门泰尼电气有限公司
& 销售代表 : 小黄
& 洽谈电话 :
&手机:
& 商务 QQ : 2917675397
& 传真(FAX): (请注明,01006收)
& 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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