Method for generating PLC (programmable logic controller) code for interlocking system

Abstract

The invention provides a method for generating a PLC (programmable logic controller) code for an interlocking system, comprising the following steps of: A, setting a rule for transferring an interlocking table element model into an expanded interlocking table element model according to the actual operation requirements of the railway, wherein the rule conforms to the grammar of the model-model transfer language QVT; B, setting a rule for transferring the expanded interlocking table element model and an interlocking access logic element module into a PLC element model according to the transfer requirement of a PLC model, wherein the rule conforms to the QVT crammer; and C, setting a rule for transferring the PLC element model into a PLC code according to the transfer requirement of the PLC code, wherein the rule is based on the grammar of the model-text transfer language MOFScript. Due to the adoption of the method for generating the PLC (programmable logic controller) code for the interlocking system, the development efficiency of the software of the interlocking system can be improved, the reliability and the security of the software of the interlocking system can be enhanced, the problem of low efficiency caused by manual coding can be avoided, the human errors resulted from manual coding can be effectively alleviated, the synchronization of the document and the final code generated in the analysis and design phase can be guaranteed, and the follow-up software upgrading and maintaining efficiency and accuracy can be enhanced.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a method for generating codes of a programmable logic controller (PLC, Programmable Logic Controller) of an interlocking system. Background technique [0002] The computer interlocking system (hereinafter referred to as the interlocking system) is a signal system used to direct train operation and ensure traffic safety in railway stations. It directly controls the signal equipment in the entire station, and plays a key role in ensuring the safe transportation of passengers and goods and improving transportation efficiency. play an important role. According to the standard EN50126 and IEC61508, the interlocking system is classified as a SIL-4 safety-critical system, so its reliability and safety are highly valued by railway leaders, system developers and users. [0003] In the software design of the existing computer interlocking system, most of the traditional methods are u...

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Problems solved by technology

[0005] 1. The manual coding of the interlocking system will inevitably introduce human errors and reduce the safety of the interlocking system;

[0006] 2. The manual coding of the interlocking system has defects such as long development cycle and low development efficiency;

[0007] 3. During the manual coding process of the interlocking system, developers will ignore the documents and design charts generated during the analysis and design stage, and only focus on code writing and debugging, resulting in inconsistencies between the final code and design documents, which will cause subsequent software upgrades and software Difficult to maintain, making software upgrades and software maintenance costly

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