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Fault detection system for master switch based on PLC system

A master switch, fault detection technology, applied in circuit breaker testing and other directions, can solve problems such as production loss, blockage, crash, etc., to improve work efficiency, avoid major accidents, and reduce failure rates.

Active Publication Date: 2015-08-12
LIANFENG STEEL (ZHANGJIAGANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the continuous casting machine in the steelmaking workshop is "deadlocked" or "blocked" due to the failure of the master switch, it will bring great losses to production.

Method used

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  • Fault detection system for master switch based on PLC system
  • Fault detection system for master switch based on PLC system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Such as figure 1 and 2 The shown master switch fault detection system based on the PLC system includes a master switch, a PLC module, a communication module, cables, an industrial computer and an alarm device, and the PLC module includes a CPU module, a DI module, and a DO module and a programming computer, the master switch is connected to the CPU module through a DI module and a cable, the alarm device is connected to the CPU module through a DO module and a cable, and the industrial computer and the programming computer are connected to the communication module through a network cable , the communication module is connected with the CPU module.

[0024] The detection method of fault detection system of the present invention comprises the following steps:

[0025] 1) Connect the contact of the master switch to the DI module of the PLC module through the cable.

[0026] 2) Write the monitoring program of each contact of the master switch on the programm...

Embodiment 2

[0033] Example 2: Such as figure 2 Shown: in the working process of WINNC described in the present invention, the number of master switch actions reaches 30,000 times, and the WINCC screen will automatically pop up a dialog box to prompt that the master switch needs to be opened for thorough inspection. In the working process of WINNC according to the present invention, the number of master switch actions reaches 100,000 times, and the WINCC screen will automatically pop up a dialog box to prompt that the master switch needs to be replaced; thus avoiding manual recording of the time for replacing the master switch, which leads to The recording error will affect the normal use of the master switch.

Embodiment 3

[0034] Example 3: Such as figure 2 As shown, the present invention is applied in the production process of the converter, and archives the action information of the converter tilting in the WINCC and the interlock action point of the master switch of the oxygen lance and the action contact of the master switch through the memory, wherein the information mainly includes: The operation times and time of the command switch, the replacement time of the master switch, the maintenance record of the master switch, etc., all these information are filed as the history record of the command switch action, which is convenient for the operator to check at any time.

[0035] When an abnormal and controversial fault occurs, the cause of the fault can be accurately analyzed through historical record trends and combined with the actual situation at that time.

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PUM

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Abstract

The invention discloses a fault detection system for a master switch based on a PLC system. The fault detection system comprises the components of the master switch, a PLC module, cables, an industrial controller and an alarm device. A main contact action signal of the master switch is acquired through the PLC module. Furthermore data are transmitted to the industrial controller and the alarm device through communication cables. Through a background PLC program, times and numbers-of-times of actions of all points in each time are recorded. Furthermore real-time actions of each interlocking point and contact, current tilting, an action mark and an interlocking action of an oxygen gun master switch are simulated on the industrial controller in a picture manner. On a fault condition, a red lamp is triggered for flashing and alarming, thereby facilitating finding and eliminating the fault by electrical maintaining personnel in a short time and shortening fault handling time. Furthermore after the number of actions of a master switch contact reaches a certain number, a picture reminds the maintaining personnel to check or change so as to reduce the fault rate of the master switch.

Description

technical field [0001] The invention relates to the technical field of fault detection of a master switch, in particular to a fault detection system for a master switch based on a PLC system that can quickly respond to fault points and facilitate maintenance. Background technique [0002] With the continuous downturn of the iron and steel industry, cost reduction and efficiency increase have become the top priority of iron and steel enterprises. As a steelmaking workshop, it is a continuous operation workshop. Failure to discover the fault point in time will have an immeasurable impact on the subsequent process, ranging from affecting the production rhythm, to causing blockage and death of the continuous casting machine, which also leads to an increase in costs and losses to the enterprise , in order to avoid these unnecessary losses, electrical maintenance personnel must quickly find out the fault points of electrical equipment in a short time. [0003] In the prior art, t...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 王力玉姚磊卢浩姜峰李玲
Owner LIANFENG STEEL (ZHANGJIAGANG) CO LTD