Link redundant control method based on EPA network bridge
A redundant control and network bridge technology, applied in the field of network communication, can solve the problems of different function definitions and the inability to effectively isolate the communication data of micro-network segment equipment, and achieve the effect of improving reliability, reliable message processing and forwarding
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[0014] The implementation of the present invention will be described in detail below with reference to the drawings and specific examples.
[0015] figure 1 EPA network topology, including two network segments: monitoring level L 2 Network segment and field device level L 1 network segment. Field device level L 1 The network segment is used to realize the communication between various field devices in the industrial production site and between the field devices and the L 2 Network segment connection; monitoring level L 2 The network segment is mainly used to realize the connection between the control room instruments, devices and man-machine interfaces. Whether it is monitoring level L 2 Network segment or field device level L 1 Network segments can be divided into one or several micro network segments. Each micro network segment is used as a control area to connect multiple EPA devices. In a control area, EPA devices communicate with each other to achieve specific measurement a...
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