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ControlNet是一种高速串行通信系统,适用于需要进行实时应用信息交换的设备之间的通讯。Con-trolNet以一种确定加预测的模式进行运作。包含于ControlNet系统的控制设备都是复杂控制设备,比如可编程逻辑控制器(PLC)、HMI′s以及基于PC的控制器。该网络总线速率为5Mbps,在端到端总长为250m的距离内,网络可支持的最大节点数为48个。总线拓扑结构可以是星型、树型、总线型或是这3者之间的任意组合。能够使用的中继器数目只受到系统延迟时间的限制,使用中继器,最大的端到端传输距离可以达到30km以上。尽管ControlNet采用了比其他自动和控制网络更大的带宽,它并不能作为传
ControlNet is a high-speed serial communication system suitable for communication between devices that require real-time application information exchange. Con-trolNet operates in a deterministic plus predictive mode. Control devices included in the ControlNet system are complex control devices such as programmable logic controllers (PLCs), HMI’s, and PC-based controllers. The network bus speed of 5Mbps, in the end to the end of a total length of 250m distance, the network can support the maximum number of nodes 48. The bus topology can be star, tree, bus, or any combination of the three. The number of repeaters that can be used is only limited by the system delay time. With repeaters, the maximum end-to-end transmission distance can reach more than 30km. Although ControlNet uses more bandwidth than other automation and control networks, it can not be used as a