Using MATLAB, SIMULINK and Control System Toolbox: a practice approach
Using MATLAB, SIMULINK and Control System Toolbox: a practice approach
PLC-automata: a new class of implementable real-time automata
Theoretical Computer Science - Special issue on real-time systems and concurrent and distributed software
Automata For Modeling Real-Time Systems
ICALP '90 Proceedings of the 17th International Colloquium on Automata, Languages and Programming
Modeling Heterogeneous Real-time Components in BIP
SEFM '06 Proceedings of the Fourth IEEE International Conference on Software Engineering and Formal Methods
III-Phase Verification and Validation of IEC Standard Programmable Logic Controller
CIMCA '06 Proceedings of the International Conference on Computational Inteligence for Modelling Control and Automation and International Conference on Intelligent Agents Web Technologies and International Commerce
Verification and Implementation of Dependable Controllers
DEPCOS-RELCOMEX '08 Proceedings of the 2008 Third International Conference on Dependability of Computer Systems DepCoS-RELCOMEX
Translation-Based Model Checking for PLC Programs
COMPSAC '09 Proceedings of the 2009 33rd Annual IEEE International Computer Software and Applications Conference - Volume 01
PLC programming with signal interpreted Petri nets
ICATPN'03 Proceedings of the 24th international conference on Applications and theory of Petri nets
Verification and implementation of software for dependable controllers
International Journal of Critical Computer-Based Systems
Formal modeling and synthesis of programmable logic controllers
Computers in Industry
Designing safe, reliable systems using scade
ISoLA'04 Proceedings of the First international conference on Leveraging Applications of Formal Methods
Automatic code generation for PLC controllers
SAFECOMP'05 Proceedings of the 24th international conference on Computer Safety, Reliability, and Security
Ladder diagram and Petri-net-based discrete-event control design methods
IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews
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Programmable Logic Controllers (PLCs) are widely used in industry. PLC systems are reactive systems which run cyclically. In each cycle, the system state is checked and the program is executed once to determine the system behavior for a single cycle. Development of PLC systems conventionally follows the V-model, but increasing demand for efficiency and reliability requires a new rigorous and rapid design flow. In this paper, we propose a component-based formal modeling and synthesis method for cyclic execution platforms and apply it to PLC. Our method consists of three main phases: modeling, verification and code synthesis. In the modeling phase, the BIP (Behavior-Interaction-Priority) framework which is flexible and expressive is used as the modeling language. Real-time behavior, which is intensely concerned in PLC systems, can be modeled as well. In the verification phase, the system model is translated to timed automata and checked by Uppaal. Verification helps to ensure correctness of the model and further increases reliability of the implementation. In the code synthesis phase, the software part of the system model is extracted and synthesized to cyclic code. Although the PLC software runs cyclically, the software model is not necessarily given in a cyclic manner. We propose an algorithm which can generate high-performance cyclic code from a model which describes the business work-flow. This feature significantly simplifies program development. A set of tools is implemented to support our design flow and they are applied to an industrial case study for a PLC system that controls dozens of physical devices in a huge palace.