Open system based safe intelligent programmable logic controller and application

Abstract

The invention relates to an open system based safe intelligent programmable logic controller. Consumption type hardware based on open type hardware design realizes a core CPU engine of the controller,traditional programmable logic controller hardware is replaced, and the hardware cost can be reduced; the controller uses a generate Linux operating system instead of a traditional firmware system ofthe programmable logic controller; and a controller program operation software system is realized by open-source software as OpenPLC, so that the controller is intelligent and can be flexibly expanded from basic software and customized. The controller using the general Linux operating system environment is integrated with built-in IPsec VPN to ensure the safety of configuration and communicationprocess between the controller and an engineer station or among controllers, the identity authentication is realized, autonomous controllability in the safety level can be realized on the basis of protection of the national encryption algorithm, and a real safe intelligent programmable logic controller is realized.

Description

technical field [0001] The invention relates to a safe intelligent programmable logic controller based on an open system and its application, belonging to the technical field of programmable controllers. Background technique [0002] The trend of highly integrated industrial control is becoming increasingly urgent. Highly integrated industrial control systems use the Internet as a communication intermediary for intercommunication. Under this background, corresponding network security issues have gradually surfaced and have become one of the main obstacles that threaten industrial control. Some factories even caused a lot of property losses and casualties due to industrial viruses. Lessons learned time and time again warn us that industrial safety must be paid attention to urgently. [0003] However, for the security protection of the industrial Internet, there are different opinions from various schools of thought. Most of them use firewalls or add security protection equipm...

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Problems solved by technology

[0003] However, for the security protection of the industrial Internet, there are different opinions from various schools of thought. Most of them use firewalls or add security protection equipment for protection. There is no security protection mechanism based on the controller itself. Once the virus passes through the protection equipment and enters the controller, all protection The equipment is useless, but has become an obstacle for maintenance personnel to discover viruses

[0004] Existing programmable controllers abroad, such as German Siemens, American AB, and Japanese Mitsubishi Omron, etc., mostly use non-intelligent control systems to design for industrial control, without considering the security and safety protection of the controller after networking. The factory itself It is difficult to add security protection, the bottom layer of the controller cannot add protection functions twice, and there are many problems such as closed and undisclosed codes of related programmable controller manufacturers; domestic programmable controllers are also mainly non-intelligent controllers, which also have the above security The disadvantages of the problem cannot be solved, and there are no relevant mature products for intelligent controllers

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