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...

Examples

Embodiment Construction

[0057] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0058] In the network redundancy method based on the high-availability industrial Ethernet of the present invention, the high-availability is high-performance fault tolerance, that is, in the case of a link failure, the industrial control network continues to maintain an available state; the high-availability industrial An Ethernet network consists of several dual-connected nodes communicating with each other via communication links; the method consists of the following:

[0059] The inventive method comprises the following steps:

[0060] Add a link redundancy entity on the original data link layer of Ethernet to manage the sending and receiving of Ethernet data frames;

[0061] Set up two network adapter drivers relative to the original protocol stack for managing two network adapter interfaces;

[0062] Connect the dual-connected node including the link ...

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...

Examples

Embodiment Construction

[0057] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0058] In the network redundancy method based on the high-availability industrial Ethernet of the present invention, the high-availability is high-performance fault tolerance, that is, in the case of a link failure, the industrial control network continues to maintain an available state; the high-availability industrial An Ethernet network consists of several dual-connected nodes communicating with each other via communication links; the method consists of the following:

[0059] The inventive method comprises the following steps:

[0060] Add a link redundancy entity on the original data link layer of Ethernet to manage the sending and receiving of Ethernet data frames;

[0061] Set up two network adapter drivers relative to the original protocol stack for managing two network adapter interfaces;

[0062] Connect the dual-connected node including the link ...

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