Distributed secure transmission method applied to distributed control system (DCS)

A safe transmission and distributed technology, applied in the field of industrial control, can solve the problem of not fully considering the special requirements of fail-safe transmission, and achieve the effect of ensuring the safety of the bus

Active Publication Date: 2014-11-26
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the specific content of a distributed control system (DCS) communication protocol has not fully considered the special requirements of fail-safe transmission, and propose a distributed safe transmission method suitable for DCS

Method used

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  • Distributed secure transmission method applied to distributed control system (DCS)
  • Distributed secure transmission method applied to distributed control system (DCS)
  • Distributed secure transmission method applied to distributed control system (DCS)

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Aiming at a self-developed DCS control system, the present invention proposes a distributed security transmission method applicable to non-intelligent DCS control systems of field instruments in combination with safety standards related to domestic and foreign chemical safety control.

[0021] exist figure 1 Among them, the overall communication structure of the distributed secure transmission method is based on the three-layer structure of the open and interconnected OSI-RM international standard: the physical layer 103 , the data link layer 102 and the application layer 101 . The protocols adopted by several underlying networks are different. The DCS control system takes CAN bus 105 and 106 as the basic network, and can route safety data through standard routing among various underlying networks 107, 108, and 109. The protocols can be used as multiple The app...

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PUM

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Abstract

The invention discloses a distributed secure transmission method applied to a distributed control system (DCS). The method comprises the following steps that: the control system is powered on, and a master station and slave stations perform power-on repeated media access control identity (MACID) detection; the master station and the slave station establish connection, and the master station transmits configuration information to each slave station through a secure message; each slave station acquires periodically transmits acquired data to the master station through a secure message according to a data acquisition period in the configuration information received from the master station; and the master station processes the data received from the slave stations, and transmits corresponding control information to each slave station through a secure message. A controller area network (CAN) bus is used as a basic network, only the data bit part of a CAN bus protocol is used, and different networks are allowed to be accessed.

Description

technical field [0001] The invention belongs to the field of industrial control and relates to a distributed safe transmission method suitable for DCS. Background technique [0002] In recent years, many large companies in the international automation field have proposed fieldbus functional safety technologies that meet international functional safety standards, such as PROFIsafe from Siemens, CIPsafety from Rockwell, and cc-link safety from Mitsubishi. PROFIsafe technology integrates the safety system as a function into the control system, which improves safety and reduces costs. CIP safety and DeviceNet safety technologies ensure safety through redundant CRC, adding time stamps after data verification, and providing a specific identification number for each network. The standard control system and safety control system are integrated on the network bus at the same time. Transmission of standard and safety information over the network. cc-link safety is to develop a secur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L12/26H04L12/24
Inventor 孔亚广黄彪徐哲史兴盛薛安克
Owner HANGZHOU DIANZI UNIV
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