Conversion method between multiple protocol bus

A conversion method and protocol conversion technology, which is applied in the direction of bus network, data exchange through path configuration, electrical components, etc., to improve the efficiency of protocol conversion and ensure the effect of seamless connection

Active Publication Date: 2009-03-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing patent applications, it is all about multi-protocol conversion for certain specific protocols, and there is no general conversion model

Method used

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  • Conversion method between multiple protocol bus
  • Conversion method between multiple protocol bus
  • Conversion method between multiple protocol bus

Examples

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Embodiment Construction

[0058] A preferred embodiment of the present invention is described as follows in conjunction with accompanying drawing: See figure 1 , the hardware basis of the conversion method between the multi-protocol buses includes microprocessor ①, external memory ② and ③, CAN controller ⑥, CAN interface circuit ⑨, Ethernet physical interface chip ④, Ethernet interface circuit ⑦, ProfiBus Protocol chip ⑤ and 485 interface circuit ⑧, etc.

[0059] The core chip is AT91SAM9261① from ATMEL company. The chip works at a maximum frequency of 200Mbps, integrates SDRAM controller② and FLASH controller③, and expands 16MB FLASH and 32MBSDRAM through the external bus⑩. Connect the CAN controller SJA100⑥ through the external bus ⑩, and add the corresponding CAN interface circuit ⑨ to realize the physical interface of CAN, and write the DeviceNet slave station program to realize the function of the DeviceNet slave station; connect the Ethernet physical interface chip through the external bus ⑩ DM9...

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Abstract

The invention relates to a converting method between multiple protocol buses. The method uses a microprocessor, a DeviceNet, a Profibus and the physical layer part circuit and microprocessor program of a Modbus/TCP network protocol to receive different protocol data, store them in the microprocessor, adopts system protocol converting method to realize the protocol converting between multiple protocols. While the task scheduling method using real time multi-task operation system is adopted in the whole protocol converting process, consequently, the real time interaction and updating control of multiple protocol converting data is realized.

Description

technical field [0001] This article involves a conversion between a variety of industrial communication network protocols, and proposes a general conversion method between multi-protocol buses, which belongs to the field bus control technology field. Background technique [0002] The field bus is the underlying communication network used in the production and manufacturing sites. It realizes the bidirectional serial multi-node digital communication between computerized on-site measurement and control instruments or equipment, and has the characteristics of real-time and high stability. Since the International Electrotechnical Commission (IEC) announced and passed the IEC61158 fieldbus standard in 2000, there are now more than ten fieldbus standards. [0003] Ethernet is a local area network commonly used in the commercial field. Combining with the TCP / IP protocol, it forms the basis of the Internet and becomes the de facto standard in network applications. This also enables ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/40
Inventor 费敏锐王佳承王海宽魏来王秉臣
Owner SHANGHAI UNIV
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