Verification of PLC Properties Based on Formal Semantics in Coq - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Conference Papers Year : 2011

Verification of PLC Properties Based on Formal Semantics in Coq

Jan Olaf Blech
  • Function : Author
  • PersonId : 904137
Sidi Ould Biha
  • Function : Author
  • PersonId : 872347

Abstract

Programmable Logic Controllers (PLC) are widely used in embedded systems for the industrial automation domain. We propose a formal semantics of two languages defined in the IEC 61131-3 standard for PLC programming. The first one is the Instruction List (IL) language, an assembly like language. The second one is the Sequential Function Charts (SFC) language, a graphical high-level language that allows to describe the main control-flow of the system. A PLC system description may comprise SFC and IL code. We formalized the semantics in the proof assistant Coq. Furthermore, we present an associated tool for automatically generating SFC representations from a graphical description - the text based IL code can be handled in Coq directly - and its usage for verification purposes. We demonstrate our approach to prove safety properties of a PLC in a real industrial demonstrator.
No file

Dates and versions

inria-00601907 , version 1 (21-06-2011)

Identifiers

  • HAL Id : inria-00601907 , version 1

Cite

Jan Olaf Blech, Sidi Ould Biha. Verification of PLC Properties Based on Formal Semantics in Coq. International Conference on Software Engineering and Formal Methods, SEFM 2011, Nov 2011, Montevideo, Uruguay. ⟨inria-00601907⟩
207 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More