Security-level DCS high-speed redundant bus communication method

A bus communication, security-level technology, applied in bus network, data exchange through path configuration, digital transmission system, etc., can solve problems such as failure to eliminate common cause failures, and achieve common cause failure elimination and high reliability. Effect

Inactive Publication Date: 2017-06-13
CHINA NUCLEAR CONTROL SYST ENG
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

This new technology improves on existing designs by adding redundancy for better fault tolerance. It also includes unique ways that work differently from previous versions without losing their effectiveness or causing problems during operation.

Problems solved by technology

The technical problem addressed by this patented system relates to improving the speed at which signals are transmitted through multiple devices connected together over an electronic network without experiencing any issues with each other's hardware components or connections that could lead them downgraded during operation due to failure.

Method used

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  • Security-level DCS high-speed redundant bus communication method

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Embodiment Construction

[0027] The technical solution of the present invention will be described in detail below.

[0028] like figure 1 As shown, a safety-level DCS high-speed redundant bus communication method of the present invention is applied to nuclear power plant DCS platform communication, comprising the following steps:

[0029] (1) Determine the physical medium

[0030] Use two different physical media for transmission;

[0031] In this embodiment, the two different physical media are RS485 and LVDS respectively.

[0032] (2) Determine the link layer

[0033] Two different link layers are used for transmission;

[0034] In the two different link layers, different transmission protocols, different frame structures, and different verification methods are used respectively.

[0035] In the two different link layers, the different coding methods are NRZI and NRZ coding; the different verification methods are two kinds of CRC32 polynomial verification.

[0036] (3) Determine the receiving pro

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Abstract

The invention belongs to the technical field of DCS platform communication of a nuclear power plant, and specifically relates to a security-level DCS high-speed redundant bus communication method. The method comprises the following steps: (1) transmitting by use of two paths of different physical mediums; (2) transmitting by use of two paths of different link layers; (3) adopting two paths of different receiving processing modules; (4) starting sending according to two frame structures determined in the step (2) on two different redundant buses determined in the step (1) after a sending module receives sending enabling signal; (5) decoding received data by use of two receiving processing modules determined in the step (3) to accomplish a rear flag bit; (6) setting one of two receiving processing modules determined in the step (3) as the main processing module; and (7) waiting the setting of the other path of data flag bit in a system set time after the main processing module finds a path of bus set flag bit; if the set occurs, comparing the data; otherwise, warning the fault of the redundant bus path.

Description

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Claims

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Application Information

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Owner CHINA NUCLEAR CONTROL SYST ENG
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