Online I/O undisturbed configuration method for distributed control system

Abstract

The invention discloses an online I / O undisturbed configuration method for a distributed control system, the distributed control system comprises a controller and at least one I / O module, when the controller is started, an I / O configuration file is called, marking is carried out according to the content of the I / O configuration file, whether an updated I / O configuration file is received or not is monitored in real time, after the updated I / O configuration file is received, framing is carried out, configuration information is added into communication information, the communication information is sent to the I / O module, and feedback information of the I / O module is received; and each I / O module checks the new configuration file in real time, and updates and replies to the controller after receiving the new configuration file. According to the invention, the I / O module configuration file is set in the controller, framing is carried out according to the I / O module configuration file, the configuration file is updated in real time, and the configuration file is issued to the corresponding I / O module, so that automatic online configuration of the I / O module is realized, the updated configuration file is generated when the I / O module changes, and the communication load is reduced.

Description

technical field [0001] The invention relates to the technical field of automation control, in particular to an online I / O non-disturbance configuration method for a distributed control system. Background technique [0002] At present, the distributed control system DCS (Distributed Control System) has been widely used in industrial control, especially in various factories. The configuration of the number of points is often different. In different partitions and control domains, the number of control stations is generally as many as dozens; the number of I / O modules (16 point cards) of a single control station is calculated as 64. A set of control system The number of I / O points is as high as 1024 points. The increase in the number of I / O points increases the configuration and debugging time of the configuration personnel. However, the personnel who perform engineering maintenance tasks on site have insufficient professional knowledge, and the configuration configuration lack...

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Problems solved by technology

[0002] At present, the distributed control system DCS (Distributed Control System) has been widely used in industrial control, especially in various factories, but according to the different control objects and devices, The type configuration of I / O modules and the number of I / O points in the control system are often different. In different partitions and control domains, the number of control stations is generally as many as dozens; the I / O modules of a single control station (16 points The number of cards) is calculated according to 64, and the I / O points of a control system are as many as 1024 points. The increase in the number of I / O points increases the configuration and debugging time of the configuration personnel, and the on-site engineering maintenance tasks Insufficient professional knowledge of personnel, and lack of self-inspection in configuration and configuration, so after the DCS is put into operation, it will often have a certain impact on the implementation of the DCS system, and indirectly lead to safety accidents. Therefore, such safety hazards are not in the factory. Accepted by users, especially in the chemical industry

[0003] In order to reduce the coupling between the controller and other functions, the master station controller needs to open up an independent thread to deal with online configuration of I / O modules and realize online configuration. Sending configuration information to I / O modules that have just joined the network or whose configuration has been changed increases the load on the controller to a certain extent; when the configuration of the I / O module has been added inside the controller, Then, when all the I / O modules are connected to the network at the same time, a lot of configuration communication messages will be sent up and down the communication bus, which increases the network load of the I / O communication bus to a certain extent; The module status is configured and configured. When the I / O module enters the redundant working mode, it needs to be powered off and plugged in to ensure that it is offline. These are a great waste of manpower.

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