Industrial control system fault location method

A technology for industrial control systems and fault location, applied in general control systems, control/regulation systems, test/monitoring control systems, etc., to achieve the effects of reduced sampling time, high-speed computing capabilities, and large storage capacity

Inactive Publication Date: 2018-04-20
ANHUI MA STEEL AUTOMATION INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above deficiencies in the prior art, the present invention provides a fault location method for an industrial control system. By setting up a host computer to establish a fault location method, it solves the general need to organize a technical expert group for multiple and multi-faceted analysis, sometimes in After several times of starting and stopping, the fault point can be finally checked out, which has the beneficial effects of low cost and fast positioning

Method used

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  • Industrial control system fault location method
  • Industrial control system fault location method
  • Industrial control system fault location method

Examples

Experimental program
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Effect test

Embodiment approach 1

[0018] Implementation mode 1: 20 key measuring points, sampling once every 50ms, archived instances generated in 4S, and so on.

[0019] 1. On the PLC, add 20 new data record data blocks, namely DB1001, DB1002, ..., DB1020, which are used for data record when recording is interrupted. Add data cache data block DB900, write the data of all channels into the data block in the form of a data block. Defined in advance, in the format recognized by WINCC, used as the data buffer sent by SFB37 to WINCC.

[0020] 2. In OB35, set the interrupt time to 0.05S. In the sampling mode, the program regularly writes data into the channel record data block. The program is as follows figure 1 shown.

[0021] 3. In the sampling stop mode, the refresh of the data is stopped, the stop time is recorded, and the data before the failure occurs is retained. Procedure such as figure 2 shown.

[0022] 4. When the data is uploaded, the PLC collects the data into the data cache data block DB900, and ...

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Abstract

The invention discloses an industrial control system fault location method. The industrial control system fault location method is characterized by comprising the following steps: a step 1 of arranging a data configuration data block, a data recording data block and a data caching data block on an industrial control system PLC; a step 2 of recording acquired data to the data recording data block when the PLC takes samples of the system; a step 3 of reading the date and the time record of the system to the data configuration data block when the PLC stops sampling; a step 4 of carrying out datauploading by the PLC, and uploading data of the data configuration data block and the data recording data block to the data caching data block; a step 5 of sending data of the data caching data blockto a WINCC through an SFB37 functional block by the PLC; and a step 6 of establishing connection with the PLC on the WINCC configuration on a host computer, selecting a filing data link, establishinga process control variable under the variable record, and filing data sent by the PLC on the WINCC.

Description

technical field [0001] The invention belongs to the technical field of the industrial control field, and in particular relates to a fault location method for an industrial control system. Background technique [0002] Modern large-scale unit control programs have more safety interlock systems. When an interlock trip occurs, most of the means of troubleshooting are to view event records, historical trend graphs, etc. But in many occasions, this is difficult to meet the actual needs of the site. During the process of realizing the present invention, the inventor found at least the following problems in the prior art: for some faults, the event record is the result after the safety interlock, and the direct cause has not been captured. In the existing industrial control system, the real-time sampling cycle of PLC is generally set to 1 second, and the archiving cycle of WINCC is generally set to 2-5 seconds. Due to the long cycle, it is difficult to capture abnormal data. If ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0213G05B2219/24065
Inventor 万小萍王振飞
Owner ANHUI MA STEEL AUTOMATION INFORMATION TECH
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