A Method of Event Sequence Recording in Distributed Control System

A technology of event sequence recording and decentralized control system, applied in the direction of electrical program control, comprehensive factory control, etc., can solve problems such as easy generation of errors, and achieve the effect of reducing the relative time error of events, improving real-time performance, and improving accuracy

Active Publication Date: 2016-08-17
SHANGHAI AUTOMATION INSTRAION CO LTD
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Problems solved by technology

[0006] The invention discloses a method for event sequence recording in a decentralized control system, which is used to solve the time resolution of the event sequence recording system of the decentralized control system in the prior art, which needs to be manually closed by two contacts, depending on the time when the two contacts are closed A small time difference is used to test the time resolution of the sequence of events recording system, which is prone to errors

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  • A Method of Event Sequence Recording in Distributed Control System
  • A Method of Event Sequence Recording in Distributed Control System
  • A Method of Event Sequence Recording in Distributed Control System

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing and embodiment:

[0026] figure 1 is a schematic diagram of the method for event sequence recording in the distributed control system of the present invention, figure 2 It is a flow chart of the digital quantity data processing module of the method for event sequence recording in the distributed control system of the present invention, please refer to figure 1 , figure 2 , a method for event sequence recording in a distributed control system, including: collecting channels through a digital input acquisition module; acquiring data from the digital input acquisition module through a digital input data processing module, and the digital input data processing module is in Add a time stamp to the data, and transmit the data added with the time stamp to the event sequence recording system to record the event processing module, wherein, the time stamp stamped by the digital inpu...

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Abstract

The invention discloses a method for sequentially recording events in a distributed control system, and belongs to the technical field of distributed control systems. According to the method, an internal clock of the distributed control system is synchronized by a satellite clock of a global positioning system, phenomena that events recorded by a sequence of event recording system are omitted, and the sequence of event occurrence time recorded by the sequence of event recording system is disordered and the like are eliminated, relative time errors of the events of the sequence of event recording system are reduced, the capacity of the sequence of event recording system and real-time of acquiring and processing the events of the sequence of event recording system are improved, the accuracy of analyzing accidents by the distributed control system is further improved, and the field requirement of the distributed control system is met.

Description

technical field [0001] The invention relates to a distributed control system, in particular to a method for event sequence recording in the distributed control system. Background technique [0002] Distributed Control System (DCS for short) is widely used in various industries such as electric power, metallurgy, petrochemical industry, etc. With the increasing scale and complexity of distributed control systems, once the shutdown occurs during system joint debugging or production operation, It is necessary to find the cause of the accident through the DCS platform, and the general historical data records can only achieve second-level resolution. Analysis caused a great deal of confusion. [0003] The event sequence recording system (Sequence Of Event, referred to as SOE) obtains event information with millisecond resolution, providing strong evidence for accident analysis of distributed control systems. [0004] It can be said that SOE is an important equipment for monitor...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
Inventor 杨烨易铃芳许大庆包伟华朱强陈小华杨德甫
Owner SHANGHAI AUTOMATION INSTRAION CO LTD
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