Method and device for automatically generating application programs of programmable logic controllers

Abstract

Disclosed is a method for automatically generating application programs of programmable logic controllers. The method includes steps of generating knowledge bases: generalizing and abstracting to obtain a basic knowledge base which describes general characteristics on the basis of the general characteristics of application programs of a plurality of PLC (programmable logic controller) models in aspects of functions, implementation algorithms, programming modes and the like by the aid of an object-oriented theory, generating a basic program module of an application program, and generalizing and abstracting to obtain an auxiliary knowledge base which describes special circumstances according to the special circumstances of different devices utilized in production links; inputting a logic expression: inputting the logic expression which describes technical parameter requirements of users in a man-machine interaction mode; and generating the application program: matching technical parameters described by the inputted logic expression with knowledge in the basic knowledge base and the auxiliary knowledge base, generating the corresponding basic program module and an auxiliary program module, integrating and modifying the modules and finally generating the PLC application program. The method has the advantages that the software generating efficiency is improved, and the development cycle is shortened.

Description

technical field [0001] The invention relates to the fields of automatic control and artificial intelligence, in particular to a method and device for automatically generating an application program of a programmable logic controller (PLC). Background technique [0002] Since the advent of programmable logic controller (PLC), more than 300 kinds of programmable logic controllers have been used in the fields of military, aerospace and automobile manufacturing in the world. [0003] The control logic of each controlled device in the control system is different according to the location, function and parameters of the device itself. In the past, all work in the control software development process was done manually, including the analysis and synthesis of the control system, until it was converted into a certain model language, and input to the computer, and this process was quite complicated and strict. [0004] Moreover, due to the large number of PLC manufacturers and variou...

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Problems solved by technology

In the past, all the work in the control software development process was done manually, including the analysis and synthesis of the control system, until it was transformed into a certain model language, and input to the computer, and this process was quite complicated and strict.

[0004] Moreover, due to the large number of PLC manufacturers and various varieties, various technical performances, command systems, programming languages, programming environments, communication protocols, etc. are also different, users need to learn the programming language of the purchased PLC and be familiar with the various aspects of the product before using Various parameters, understanding of product usage conditions and usage environment, etc., and secondly, it is necessary to accurately analyze and summarize various logical relationships between control devices in order to write an application program suitable for this production process, which takes a lot of time

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