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A Refinement-Based Validation Method for Programmable Logic Controllers

Hai Wan 1 Xiaoyu Song 1 Gang Chen 2 Ming Gu 1 
1 FORMES - Formal Methods for Embedded Systems
LIAMA - Laboratoire Franco-Chinois d'Informatique, d'Automatique et de Mathématiques Appliquées, Inria Paris-Rocquencourt
Abstract : Programmable logic controllers (PLCs) are widely used in computer-based industrial applications. Timers play a pivotal role in PLC real-time embedded system applications. The paper addresses the formal validation of PLC systems with timers in the theorem proving system Coq. The timer behavior is characterized formally. A refinement validation methodology is presented in terms of an abstract model and a concrete model. The refinement is calibrated by a mapping relation. The soundness of the methodology is shown in the proving system. An illustrative case study demonstrates the eectiveness of the approach.
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Hai Wan, Xiaoyu Song, Gang Chen, Ming Gu. A Refinement-Based Validation Method for Programmable Logic Controllers. The 10th International Conference on Quality Software, Jul 2010, Zhangjiajie, Hunan, China. ⟨inria-00516014⟩

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