Several Kinds of Mainstream Industrial EtherNet

The application of industrial EtherNet becomes more and more comprehensiveness. In this paper, the basic technology of several kinds of existing mainstream industrial EtherNet such as HES, EtherNet/IP, Profinet and Modbus, especially the network structure and link equipment with function of bridge and gateway; the control and information protocol of EtherNet/IP with interconnecting of three different network; TCP,UDP and IP, soft real time, synchronous real time; the network structure and communication mode of Modbus/TCP were introduced respectively.