Multi protocol conversion method and device between MODBUS/TCP industry Ethernet and field bus device network as well as field bus of PRofibus DP

A field bus and protocol conversion technology, applied in the direction of bus network, network connection, data exchange network, etc., to improve flexibility and compatibility, and solve interconnection problems

Inactive Publication Date: 2005-11-16
SHANGHAI UNIV
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However, in the published patent literature, there is no reference to the multi-protocol conversion method and d...

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  • Multi protocol conversion method and device between MODBUS/TCP industry Ethernet and field bus device network as well as field bus of PRofibus DP
  • Multi protocol conversion method and device between MODBUS/TCP industry Ethernet and field bus device network as well as field bus of PRofibus DP
  • Multi protocol conversion method and device between MODBUS/TCP industry Ethernet and field bus device network as well as field bus of PRofibus DP

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Embodiment Construction

[0037] A preferred embodiment of the present invention is described below in conjunction with accompanying drawing:

[0038] Referring to Fig. 1, the multi-protocol conversion method between MODBUS / TCP industrial Ethernet of the present embodiment and DeviceNet field bus and Profibus DP field bus is: adopt industrial Ethernet interface module 32 to realize MODBUS / TCP industrial Ethernet protocol, adopt DeviceNet master The node communication adapter module 19 realizes the DeviceNet field bus protocol, adopts the Profibus DP master node communication adapter module 15 to realize the Profibus DP field bus protocol, and establishes a unified message model by the software in the microprocessor 8 to realize MODBUS / TCP industrial Ethernet, Application layer protocol conversion between DeviceNet field bus and Profibus DP field bus.

[0039] Referring to Figure 2, the above unified message model is:

[0040] ①The DeviceNet network configuration message contains relevant information f...

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Abstract

Software in MPU builds united message model to realize protocol conversion in application layer among MODBUS/ TCP industrial Ethernet, DeviceNet field bus and Profibus DP field bus. Corresponding interface module and communication adapter modules at main nodes realize their relevant protocols. Through an internal bus, protocol conversion device built from a MPU is connected to industrial Ethernet interface module, DeviceNet communication adapter module at main node, Profibus DP communication adapter module at main node and a SRAM. Through a serial peripheral interface, MPU is connected to an electrically erasable memory. The invention solves converting protocols based on different standards. One communication frame is compatible to multiple industrial communication networks so as to meet requirements of network real-time at low-layered devices as well as high rate and large capacity of network on information layer.

Description

technical field [0001] The invention relates to conversion between various industrial communication network protocols, in particular to a protocol conversion method and device between MODBUS / TCP industrial Ethernet, DeviceNet field bus and Profibus DP field bus. Background technique [0002] Fieldbus is a system used in the production site to realize two-way serial multi-node digital communication between computerized measurement and control equipment. It is also known as an open, digital, and multi-point communication underlying control network. After decades of development, fieldbus technology has formed a multi-standard coexistence situation, and any standard cannot completely replace other standards. In order to improve the competitiveness of products, manufacturers began to seek a solution to equip a variety of fieldbus interfaces when developing a certain product, and users should also consider the compatibility and scalability of the selected product with the entire s...

Claims

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Application Information

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IPC IPC(8): H04L29/06
Inventor 费敏锐陈维刚丁磊
Owner SHANGHAI UNIV
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