Ethernet/IP communication gateway and implementation method thereof

Abstract

The invention relates to an Ethernet / IP communication gateway. Modbus serial equipment can be accessed into an Ethernet / IP network by mutually converting Ethernet / IP protocols and Modbus protocols; and main station equipment of the Ethernet / IP network can be used for scanning and controlling a Modbus site network and realizing data exchange. The communication gateway and the implementation method can be used for realizing data forwarding and analysis for the Ethernet / IP protocols and the Modbus protocols and also realizing the functions of an Ethernet / IP adapter and a Modbus Master; and a Modbus side can be used for managing as many as 32 Modbus-Slave equipment, supporting the segment transmission of Modbus commands and the packaging and the subpackaging transmission of Modbus data packets, and being capable of configuring gateway parameters by an upper computer. The invention has quite flexible application and good innovation and practicability.

Description

technical field [0001] The invention relates to a communication gateway and a realization method thereof, in particular to an Ethernet / IP communication gateway capable of achieving the purpose of Ethernet / IP information layer network access and monitoring of the Modbus field network and a realization method thereof. Background technique [0002] Ethernet / IP is based on standard Ethernet technology and standard TCP / IP protocol. Adding CIP protocol at the application layer becomes Ethernet / IP. The CIP introduced by Ethernet / IP in commercial Ethernet is an application layer protocol specially designed for industrial control, providing a set of services for accessing data and controlling equipment operations. CIP running on EIP can co-exist with any other protocol running on standard TCP / IP transport layer. EIP can coexist with any CIP-based network (such as DeviceNet and ControlNet). [0003] In view of the fact that there are a large number of serial port devices in the indu...

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Problems solved by technology

[0004] The application patent number applied by Shanghai Electric Appliance Research Institute (Group) Co., Ltd. is: 200710043281.9, and the title is: "Embedded Ethernet / IP Scanner" invention patent application, which involves an embedded Ethernet / IP master station Technology, that is, the scanner, the invention patent involves the hardware module composition of the scanner and the implementation method of the scanner software, but does not mention the conversion and mutual access between the Ethernet / IP network and the Modbus network

[0005] The searched applicant is: Shanghai University, the application patent number is 200410093010.0 for the invention patent "Protocol conversion method and device between Modbus / TCP industrial Ethernet and Profibus-DP field bus"; the searched applicant is: Shanghai University, the patent number is: CN03129417.0, titled: "Protocol Conversion Method and Device Between Modbus / TCP Industrial Ethernet and DeviceNet Fieldbus" patent for invention; searched for the applicant: Shanghai University, patent application number: 200510025262.4, titled: " Multi-protocol conversion method and device between Modbus / TCP industrial Ethernet and device network field bus and Profibus-DP field bus", these three invention patents or patent applications involve Profibus protocol and device network protocol to Modbus / TCP The conversion method and device of the protocol, and the realization of the three protocols all adopt the existing Anybus company's ready-made product module, and the dual-port RAM data interaction between the module and the CPU realizes the simple two-two conversion between the protocols, but there is no Involves the mutual conversion of Ethernet / IP and Modbus protocols, and does not mention gateway technology

[0006] Also searched for the application number of Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.: 200610118794.7, titled: "General Industrial Protocol Ethernet Adapter and its Software" patent application for invention; also searched for Shanghai Electrical Apparatus Research Institute (Group) ) Co., Ltd. applied for the application number: 200710171777.4, titled: "Multi-protocol Industrial Ethernet Adapter" patent application; these two inventions provide devices for converting Ethernet / IP protocol and Modbus protocol, but they do not involve Modbus The technology of network management and gateway does not involve the packet transmission of Modbus segmented data, and does not involve parameter configuration through the Ethernet interface

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