说明：
Since the industrial automation system evolves towards the distributed and intelligent real-time control and information technology develops quickly, it is important for the enterprise to realize the comprehensive and seamless information integration from the field control layer to the management layer. The industrial Ethernet technology is widely promoted and applied and becomes the development direction of the industrial control communication in the future by offering a open foundation infrastructure and meeting the urgent demands of the Factory automation field for the unified communication protocol and network.The Factory automation network is required to be highly reliable under the industrial environment and the industrial Ethernet should have the strong redundancy functions; the Fac...