Industrial safety control system and control method thereof
A technology for industrial safety and control systems, applied in transmission systems, digital transmission systems, safety communication devices, etc., to achieve the effect of preventing control
Inactive Publication Date: 2011-04-20
SUPCON GRP +1
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Problems solved by technology
[0007] Therefore, how to effectively connect the first network and the second network and effectively restrict the use of illegal users is a technical problem that needs to be solved at present
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[0059] The program storage unit 32 is mainly used to store program codes.
[0060] The data storage unit 33 is used to store variables required during operation and configuration information to be saved when power is turned off.
[0061] The hot start detection unit 36 is used for real-time detection of manual reset and watchdog reset.
[0062] The serial communication unit 34 is used for communicating with the upper computer through the serial port.
[0063] The MPU processor 35 adopts at least one embedded microprocessor, and each processor has a corresponding communication mechanism.
[0064] The network communication unit supports the Ethernet communication network card, can send various types of messages, and can complete the receiving and processing of all data messages on the Ethernet network.
[0065] The network security bridge 3 has multiple interfaces, and the network security bridge 3 has multiple corresponding network communication units. The network communic...
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An industry safety control system comprises a first and a second networks and a network safety bridge, wherein, the first network comprises distribution and maintenance of a key, and a key management server containing a key version number; the network safety bridge connects the first and second networks to receive a first network message, and sends the message encrypted by the key according to the key management server to the second network, receives a second network message and sends the message encrypted by the key to the first network; the network safety bridge receives a key management command of the key management server according to a predetermined cycle, updates the key in the network safety bridge based on the key management command, and saves the version number; during each communication cycle, the network safety bridge monitors the second network message; when the key version numbers match, the network safety bridge decrypts the received messages according to a predetermined decryption algorithm to generate a plaintext; the network safety bridge encrypts the message by using a latest key according to a predetermined encryption algorithm and sends the encrypted message to the first network. The industry safety control system and the industry safety control method ensure the communication security between the first and the second networks.
Description
technical field [0001] The invention relates to industrial automation control, in particular to an industrial safety control system and a control method thereof. Background technique [0002] Since the field devices of the industrial Ethernet control system are connected by Ethernet and connected to the external network through the industrial Ethernet network, users can easily access the field devices through the industrial Ethernet network. But at the same time, it is also convenient for illegal users to use mature Ethernet technology to carry out malicious damage, which makes field devices and industrial Ethernet control systems face serious security risks and threats. [0003] If an illegal user accesses a malicious device in the industrial network, intercepts the data of a transmitter, and the illegal user tampers with the sampling or control data, and sends the tampered data to the actuator, this will lead to industrial Ethernet control systems are in a very dangerous ...
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IPC IPC(8): H04L9/08H04L9/20
Inventor 冯冬芹褚健陈高翔金建祥
Owner SUPCON GRP