Remote industrial network monitoring method and system based on S-Link and VLAN (Virtual Local Area Network) technique

Abstract

The invention relates to a remote industrial network monitoring method and system based on an S-Link and VLAN (Virtual Local Area Network) technique. An S-Link protocol and a VLAN are comprised in the method, wherein if A wants to send a plaintext to B through a double-key encrypting technique, and B has a pair of public key and private key, an encrypting and decrypting process is carried out as follows: B sends the public key to A; A uses the public key of B for encrypting information of A and then sends the encrypted information to B; B uses the private key to decrypte the information of A;conversely, if B wants to send the plaintext to A, the process is carried out as follows: A receives the plaintext of B; the private key of A is used for decryption; the public key of A is used for encryption; and B receives the plaintext of A. The system comprises a management computer, a server, a remote safety communication module, a 3G communication module, a PLC (Programmable Logic Controller) main station, a PLC auxiliary station, a camera, a frequency changer, a multifunctional panel HMI (Human Machine Interface) and an Internet.

Description

technical field [0001] The technical field of the present invention is remote industrial control data transmission through the Internet in the industrial automation industry, and relates to a programmable controller PLC, an intelligent control system PAC, a multifunctional panel HMI, a frequency converter, a camera, and a management computer in industrial equipment A method and a system for communication between different hardware devices and software in a control system such as a server, etc. [0002] The method and system are different from the standard transmission of ordinary data, but realize the integrity and high security of industrial data through the S-Link security encryption protocol, and realize the real-time performance of data through VLAN technology. Background technique [0003] At present, with the improvement of China's equipment manufacturing industry and the shortage of labor force, the requirements for the intelligentization of industrial equipment are g...

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Problems solved by technology

[0006] However, all data is transmitted through the public network. In order to prevent the data from being attacked by viruses on the public network, as well as malicious data tampering, causing misoperation of industrial equipment and causing equipment and personnel safety problems, therefore, in the process, it is necessary Ensure the security, integrity and real-time performance of industrial data transmission

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