In order not to sacrifice the speed of communication, ensure the reliability and safety of the industrial bus network, A heartbeat model which is applied in high reliable industry field bus was proposed. The model define communication protocol base on heartbeat, combine heartbeat and data packet, and implement heartbeat transportation between master station and slave station. Then, with analysis of receiving data packet, the status of network node was judged, the availability and reliability of bus network communication is improved, and the network burden of master station can not be increased...
