Specification and formal verification of temporal properties of production automation systems

This article describes our approach for the specification and verification of production automation systems with real-time properties. We focus on the graphical MFERT notation and RT-OCL (Real-Time Object Constraint Language) for the specification of state-oriented real-time properties. RT-OCL is an extension of the Object Constraint Language (OCL) that is part of the Unified Modeling Language (UML). We introduce the formal semantics of RT-OCL based on a formal model of UML Class and State Diagrams and provide a mapping to temporal logics. The applicability of our approach is demonstrated by the case study of a manufacturing system with automated guided vehicles.