System and method for industrial real-time control Ethernet redundancy fault-tolerant network

Abstract

The invention discloses an industry real-time control Ethernet redundancy fault tolerance network system and a method, including at least two control domains and at least one public domain connected with all control domains, wherein, each control domain adopts multipoint crossed redundancy ring network structure, core nodal point equipments on cross points are all connected with primary nodal point equipment and backup nodal point equipment of the public domain. On the basis of the prior ring network redundancy, the invention also realizes the redundancy of the core equipments needing external communication; when a primary core exchanger fails, a core exchanger which works in the backup mode is switched to work in the primary mode, the switch time is quite short. The invention also increases the double redundancy function of a public domain exchanger, the RSTP protocol is applied to the connection between the public domain and the control domains, which considers requirements on quickness as well as simpleness. In the invention, the core exchanger of the control domains adopts the ACL or the cross VLAN to replace a special bridge, thereby reducing equipment category and possible fault points and lowering delay.

Description

technical field [0001] The invention relates to the technical field of industrial automation real-time control network, in particular to redundant fault-tolerant technology of industrial automation real-time control Ethernet and network structure fast switching technology. Background technique [0002] The use of industrial automation real-time control Ethernet can provide Ethernet data transmission and exchange between the centralized control center and equipment distributed at various points in the industrial field, and use TCP / IP communication protocol to realize industrial automation real-time control. In recent years, as Ethernet technology has been widely used in real-time control of industrial automation, it is of great significance to enhance the high reliability of Ethernet itself and shorten the failover time of the network for real-time control of industrial automation. All industries involved in real-time control are a fundamental requirement. [0003] Tradition...

AI Technical Summary

Problems solved by technology

[0007] Furthermore, due to the existence of a separate device, the dedicated network bridge, although the function of isolated deployment can be realized, it increases the delay and possible failure points

If the dedicated network bridge fails, the control system will be paralyzed, which may eventually cause serious industrial accidents

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