An OPC UA interface for an evolvable ISA88 control moduleAn OPC UA interface for an evolvable ISA88 control module
Faculty of Applied Economics
Management Information Systems (MIS)
Optical Metrology, 3D design and Mechanics (Op3Mech)
16th IEEE International Conference on Emergent Technologies and Factory Automation, September 5-9, 2011, Toulouse, France
University of Antwerp
Normalized systems theory has recently been proposed to engineer evolvable information systems. This theory includes a potential of improvement in control software for the automation of production systems. This paper aims at contributing towards evolvable and therefore easy-to-maintain control software. We introduce IEC 61131-3 code which complies with the theorems of normalized systems, forming a building block which complies with the model of an ISA88 control module, accessible via an OPC UA interface. Since OPC UA brings control software to a new level, it enables original intra-process projects to interoperate in an inter-process context. OPC UA offers new possibilities for system integration, but might also lead to a larger impact of evolvability problems.