High-availability industrial Ethernet redundancy method

Abstract

The invention relates to a high-availability industrial Ethernet redundancy method, which comprises the following steps: adding a link redundancy entity on an original data link layer of the Ethernet for managing the sending and receiving of data frames of the Ethernet; setting two network adapter drivers relative to an original protocol stack for managing two network adapter interfaces; connecting a double-connected node which comprises the link redundancy entity and the two network adapter drivers to two independent networks respectively through two network adapters; adding a redundancy control tracker for the data frames on the link redundancy entity for distinguishing the data frames with the same content; sending the data frames which have the same content and is provided with the redundancy control tracker to two mutually-independent networks by the double-connected node through the two network adapters; keeping effective frames and discarding copy frames; and setting up a node table. The method has the characteristics of transparency, self-healing property and compatibility and the like; and the reconstruction thereof is simple, and the safety performance of the system is increased so as to enable the system to have high usability.

Description

technical field [0001] The invention relates to the field of automatic control, computer network and safety field bus technology, in particular to a network redundancy method of high-availability industrial Ethernet. Background technique [0002] Distributed control is an inevitable trend in the development of industrial computer control systems. The application of fieldbus in the field of industrial control has created a new situation in the development of industrial control networks. Fieldbus data communication has high reliability, real-time and anti-interference ability, and has the advantages of simple structure, easy maintenance, and saving equipment investment. These advantages make fieldbus widely used in the industrial field as soon as it appears. However, there are many types of fieldbus protocols, and it is very difficult to realize the compatibility and interoperability of these buses, which is contrary to the openness and compatibility direction of the developm...

AI Technical Summary

Problems solved by technology

But the ring network redundancy method has the following problems: first, the ring network redundancy method only solves the failure of the backbone link (the link connecting the switch and the switch), but not the failure of the leaf link (the link connecting the node and the switch) No solution; Second, the minimum fault recovery time of the ring network redundancy method is also at the level of tens of milliseconds, which cannot meet the requirements of high-availability industrial Ethernet for fault recovery time

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