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为了在不牺牲通信速度的情况下,保证工业总线网络的可靠性与安全性,提出了一种可应用于高可靠工业总线网络的心跳包模型,通过定义心跳数据包协议,将心跳包与数据报文结合在一起,实现网络中主站节点个从站节点间收发心跳包数据。接下来利用接收到的心跳包数据,判断网络节点间的连接状况,提高总线网络通信的可用性和可靠性,同时也不会提高总线网络主站节点的网络负担。该模型应用于一个基于CAN总线网络设计的高可靠网络中,通过对网络进行测试表明,该模型达到了较好的效果,提升了整个总线网络的可用性和可靠性。
In order to ensure the reliability and safety of the industrial bus network without sacrificing the communication speed, a heartbeat packet model that can be applied to a highly reliable industrial bus network is proposed. By defining a heartbeat data packet protocol, the heartbeat packet and the data Packets together to achieve the master node in the network between the slave nodes send and receive heartbeat packet data. Next, the received heartbeat packet data is used to determine the connection status between network nodes and improve the availability and reliability of bus network communication, and at the same time, the network burden on the bus node master node will not be increased. The model is applied to a highly reliable network based on CAN bus network design. Testing the network shows that the model achieves good results and improves the availability and reliability of the entire bus network.