DCS background inter-node point directory synchronization method based on distributed real-time database

Abstract

The invention discloses a DCS background inter-node point directory synchronization method based on a distributed real-time database, and the method comprises the steps: 1, deploying a distributed real-time database on each historical station and each engineer station of a DCS background, and creating a controller state data table and a point directory data table; 2, installing a trigger on the point directory data table needing to be synchronized; 3, by a service node, receiving the point directory update information from a lower computer controller, writing the point directory update information into a real-time point directory database of the service node, and synchronously sending the update data to other nodes; 4, by a non-service node, receiving a update message, analyzing and executing an update operation, and realizing that the point directory of the non-service node is consistent with that of the service node; and 5, by the non-service node which is just started, obtaining the point directory real-time database from the service node through a shared memory. According to the method disclosed by the invention, the point directory among multiple nodes of the DCS background is automatically and synchronously updated.

Description

technical field [0001] The invention relates to the technical field of point directory synchronization between DCS background multi-nodes, in particular to a method for synchronizing DCS background multi-node point directories based on a distributed real-time database. Background technique [0002] Distributed Control System (DCS) is a comprehensive computer system that integrates process control, process monitoring, communication, and display. , and flexible configuration, convenient configuration, high reliability, high stability, powerful control functions and so on. DCS follows the basic form of the control system: it has upper computer, lower computer and process control network, and requires software and hardware configuration. The upper computer is composed of nodes including the history station, engineer station, and operator station, and performs operations such as process monitoring, process display, and control command issuance; the controller of the lower comput...

AI Technical Summary

Problems solved by technology

[0004] In the process of DCS human-computer interaction between multiple nodes at the same time, if the point directory between each node cannot guarantee consistency, it will leave a major hidden danger to the safe operation of DCS. For example, if the update of the point directory is delayed, it may cause the operator Perform control operations on a measuring point that was valid at the previous moment but is invalid at the current moment. Once the operation causes problems, huge human resources will be wasted in the troubleshooting process.

In addition, the point directory synchronization strategy in some current DCS systems is: after the point directory file is configured on the service node, manually publish the point directory file to other nodes through the file synchronization tool, and the point directory will take effect after the other nodes restart the application. This manual sync process is taking an excessive amount of time

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