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Fieldbus DP-NET with open two-stage topological structure

A DP-NET, two-level topology technology, applied in the bus network, data exchange through path configuration, electrical components, etc., can solve the problems of inconvenient system maintenance and difficult implementation, to overcome inconvenience, maintain time deterministic features, Realize the effect of seamless access

Active Publication Date: 2010-11-24
BEIJING SIFANG JIBAO AUTOMATION +1
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  • Description
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AI Technical Summary

Problems solved by technology

The existence of this problem directly leads to the inconvenience of fieldbus control system expansion, technology upgrade, and system maintenance. At the same time, it is difficult to realize the time determinism of the control data transmission of the original fieldbus control system after connecting to the heterogeneous fieldbus system.

Method used

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  • Fieldbus DP-NET with open two-stage topological structure
  • Fieldbus DP-NET with open two-stage topological structure
  • Fieldbus DP-NET with open two-stage topological structure

Examples

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Embodiment Construction

[0016] see figure 1 , the realization of DP-NET with open two-level topology includes the following links:

[0017] l. The DP-NET bus master station and slave station are interconnected through the physical link realized by the high-speed RS-485 bus, forming the first-level bus topology structure of the main line of the DP-NET bus;

[0018] 2. The DP-NET bus master station, as the first-level master station of the DP-NET bus, realizes the time-deterministic data transmission control and bus management functions of the DP-NET main line slave stations;

[0019] 3. The DP-NET bus slave station is composed of the field bus expansion mother slave station and the general slave station. The field bus expansion mother slave station is used to complete the expansion work of various field bus systems including the DP-NET bus, and the general The slave station completes the transmission and processing of the field intelligent unit measurement and control data of the DP-NET bus;

[0020...

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Abstract

The invention provides a fieldbus DP-NET with an open two-stage topological structure. The open two-stage bus topological structure consisting of a DP-NET main line and expanded field bus branches realizes time certainty transmission of data of the DP-NET bus and also meets the requirements on seamless access and data intercommunication of a heterogeneous fieldbus system to fulfill the aim of theinvention. Actual application and operation check in a plurality of big power stations at home prove that the DP-NET fieldbus system has high technical performance such as time certainty and reliability of field data transmission, and has high flexibility and adaptability in the aspect of accessing and intercommunicating with the heterogeneous fieldbus equipment.

Description

technical field [0001] The invention relates to a field bus DP-NET (Decentralized Peripheral Access Net) system with open two-level topological structure. More specifically, it relates to a communication bus system for long-distance two-way digital signal transmission between the main controller of the FCS (Fieldbus Control System) system and multiple intelligent slave control devices distributed on the site, which belongs to the Fieldbus (Fieldbus )field. technical background [0002] Fieldbus has been widely used in the field of industrial automation control since its birth, providing a more excellent way for industrial automation control data transmission. Through the field bus, the intelligent measurement and control units and the automatic control system distributed on the field form an interconnected communication network, which realizes the digital transmission of the signal quantity of the field intelligent equipment in the control system. The performance of contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L12/40
Inventor 朱磊奚志江王晓峰周立东钱华东
Owner BEIJING SIFANG JIBAO AUTOMATION
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