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A quick identification method for PLC program interlock faults in automatic operation of coke oven locomotives

A technology of automatic operation and identification method, applied in the direction of program control, electrical program control, program control in sequence/logic controller, etc., which can solve problems such as production interruption

Active Publication Date: 2015-09-30
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing control methods easily lead to interruption of production, which is also a major reason for the failure of automatic operation of domestic coke oven locomotives

Method used

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  • A quick identification method for PLC program interlock faults in automatic operation of coke oven locomotives

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Embodiment 1

[0016] This embodiment is a quick identification method for PLC interlocking faults in the automatic operation of coke oven locomotives. The process is as follows figure 1 The coke oven locomotive shown is divided into multiple operation steps by its own PLC, and each operation step is divided into multiple operation processes by the PLC for automatic operation. Each operation process has an interlock condition, and the interlock fault is performed according to the following steps Quick identification:

[0017] (1) Set a 16-bit binary integer word or 32-bit binary double integer word for each operating process of each operating step set by the coke oven locomotive PLC, and perform interlocking conditions in each process according to the sequence in the process control List, assign each interlocking condition to each bit of the binary word;

[0018] (2) Set each interlocking condition to be assigned a value of "0" in a non-fault state, and to be assigned a value of "1" when th...

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Abstract

The invention relates to an automatic running programmable logic controller (PLC) interlocking fault quick recognition method of a coke oven locomotive and belongs to the technical field of electric automatic control. The method includes the following steps: setting a binary integral character for each running process of each running step, enumerating the interlocking condition of each process according to the sequence in process control, assigning each interlocking condition on the corresponding bit of the binary integral character, setting assignment of the bit of each interlocking condition under the non-fault state to be '0' and to be '1' when the condition is not satisfied or in the fault state, utilizing a programmable logic controller (PLC) to detect the running process that the integral character is not '0', finding the running process of fault points, utilizing the PLC to detect the integral character condition of the process, finding a first bit with assigned value as '1', finding the interlocking condition of the bit, finding the fault point and enabling the coke oven locomotive to run continuously after the fault is resolved. The automatic running PLC interlocking fault quick recognition method is capable of quickly and accurately checking all interlocking conditions and finding faults.

Description

technical field [0001] The invention belongs to the technical field of electrical automation control, and relates to a method for quickly identifying faults of coke oven locomotives, in particular to a method for quickly identifying faults of PLC interlocks in automatic operation of coke oven locomotives. Background technique [0002] If the coke oven locomotive is to run automatically, it must ensure that the peripheral conditions meet the interlocking requirements of each step of the PLC (programmable logical controller). Interlock interruption occurs, which leads to the inability of the PLC control to run automatically, so that the automatic control of the coke oven locomotive stops. At present, there are many methods for displaying faults detected by the PLC program. The most common method is to use the client screen to display the faults, but usually it is necessary to establish a network with the server and the client to make a historical database for querying. This me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05G05B19/048
Inventor 吉明鹏季益龙王海军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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