Software Environment for Automated Verification of Distributed Industrial Controllers following Iec61499

Abstract. This paper presents the Verification Environment for Distributed Applications (VEDA), which is a software package for Deep Debugging of distributed controllers. Deep Debugging is a combination of model-based simulation and verification united by a homogeneous graphical user interface. VEDA deals with controllers defined in IEC61131 and IEC61499 and automatically generates the formal model of the controller given the controller’s source code. VEDA includes some facilities to develop models of plants: a graphic editor for Signal-Net Systems models and means to specify visualization of the model. It allows also to simulate the controller/plant closed-loop system, and to prove formally whether the overall behavior of the system satisfies some desired/undesired properties. For better analysis, results of the verification can be visualized by tracing trajectories with timing diagrams of required parameters. Formulation of specifications is facilitated using the visual Signal Diagram Specification Language (SDSL).