A Method of Event Sequence Recording in Distributed Control System

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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