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Industrial Ethernet in distributed control system

A distributed control and Ethernet technology, applied in the field of communication, can solve problems such as inability to guarantee transmission determinism and real-time performance, Ethernet node transmission conflicts, node transmission delay uncertainty, etc. Network redundancy, reducing operation and maintenance costs

Active Publication Date: 2010-06-09
北京和利时控制技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, with the above mechanism, there will be problems with uncertain transmission delays of some nodes, and the deterministic and real-time performance of transmission cannot be guaranteed, resulting in transmission conflicts and random backoffs of Ethernet nodes

Method used

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  • Industrial Ethernet in distributed control system
  • Industrial Ethernet in distributed control system
  • Industrial Ethernet in distributed control system

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Embodiment Construction

[0037] In order to make those skilled in the art understand the technical solution of the present invention more clearly, the technical solution provided by the present invention will be introduced below in conjunction with the drawings provided in the embodiments of the present invention.

[0038] In order to be compatible with Ethernet in the prior art, the present invention proposes the following network structure, and establishes a real-time channel by adopting the mechanism of token forwarding, specifically as figure 1 shown. It can be seen from the figure that in occasions with high security requirements, the binding relationship between TCP / IP and the network card can be closed, and only the industrial Ethernet protocol is allowed to send and receive network data. At this time, garbage data cannot be sent to the network, which can ensure the security of the network. If garbage data is sent to the Internet from other channels, causing a network storm, the industrial Eth...

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Abstract

The invention provides an industrial Ethernet in distributed control system, relating to the field of communication. The network comprises a plurality of nodes, and the nodes are subject to data packet transmission authority control by the token having data packet transmission authority. The system also realizes the functions of dual network redundancy, fast diagnosis and the like.

Description

technical field [0001] The invention relates to the communication field, in particular to an industrial Ethernet in a distributed control system (Distributed Control System, DCS) system. Background technique [0002] Network communication is one of the cores of industrial control systems, and deterministic real-time communication is the basis for the normal operation of many control systems. Ethernet has been widely used in the commercial field due to its unique advantages, and the application of Ethernet in industry is becoming more and more popular. At present, a Carrier Sense Multiple Access / Collision Detect (CSMA / CD) mechanism is adopted in Ethernet based on the Transmission Control Protocol / Internet Protocol (TCP / IP) protocol, Specifically include: when the Ethernet node has a data packet to send, the Ethernet node detects whether the network is idle; if idle, sends the data packet, and simultaneously detects whether other nodes are also sending the data packet in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/22H04L12/56H04L12/24H04L12/28
Inventor 陈奎兆
Owner 北京和利时控制技术有限公司
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