A dynamic address communication method that can automatically identify the number of expansion devices and encrypt

Abstract

The invention discloses an encrypted dynamic address communication method capable of automatically identifying the number of expansion devices. The method comprises the following steps that: S1, a main device establishes communication connection with a slave device through detecting bus charges; S2, information source encryption / decryption is carried out on the main device and the slave device in communication connection; S3, data packet transmission is carried out between the main device and the slave device; and S4, PRBS codes are adopted for carrying out dynamic estimation on channels, one-to-one channels are dynamically obtained in the process of the communication between the main device and the slave device, and the dynamic address communication is realized. A dynamic address multi-machine communication protocol provided by the invention, which is capable of automatically identifying the number of the expansion devices, high in industrial safety and self-adaptive to communication environment, solves the common problems of safety, interference resistance, dynamic configuration and like in the industrial environment; and the popularization and application of the communication protocol brings a new development space to the industrial control equipment market which is originally limited by buses and fails to enlarge configuration.

Description

technical field [0001] The invention belongs to the technical field of industrial control equipment, and in particular relates to a dynamic address communication method that can automatically identify the number of expanded equipment and encrypt. Background technique [0002] In industrial control equipment, a bus that is highly resistant to interference, has security features, and can dynamically identify equipment loads is urgently needed in current applications. [0003] General industrial control equipment includes the following components: CPU (Central Processing Unit) module, various input and output modules, and data upload and download modules. The CPU and all kinds of input and output, data upload and download modules are connected to each other through a bus with a certain communication protocol. The existing communication protocols on the market currently have the following problems: [0004] One, the lack of necessary confidentiality features. When the CPU mod...

AI Technical Summary

Problems solved by technology

In practical applications, as long as a system of a manufacturer is cracked, the security of other systems cannot be guaranteed

For manufacturers producing high-volume industrial control equipment, this also reduces the security of their equipment

[0005] Second, it is impossible to dynamically monitor and prevent interference

However, in the industrial environment, there are often a variety of complex electromagnetic and mechanical interferences, which may cause errors in the data transmitted on the bus in the system

A wrong data may cause the whole set of industrial equipment to enter the wrong working state, resulting in unpredictable danger and economic loss

In some devices, some protection measures against interference situations are indeed applied, but they cannot dynamically predict the interference situation

Once the working environment of the entire control system changes, it may lead to an increase in the error rate of the entire system, causing a series of serious consequences

[0006] 3. The load cannot be dynamically identified

This also means that once some connection relationships in the control system change, the entire set of industrial equipment must enter a state of shutdown or low production capacity, which will bring huge economic losses to the enterprise

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