The procedure of migrating SCADA and DCS functionality of the ISA-95 process automation
architecture to a Service based automation architecture is discussed. Challenges in such
migration are discussed and defined. From here the necessary migration technology and
procedures are proposed. The critical migration technology is based on the mediator
concept. The migration procedure is based on a functionality perspective and comprises four
steps: initiation, configuration, data processing and control execution. Its argued that these …

ABSTARCT The use of Service Oriented Architectures (SOAs) in industrial automation
promises an improved cross-layer integration as well as a functionality decoupled from the
technical implementation. Compared with the earlier investigated manufacturing industry,
control systems in the process industry reveal additional challenges in terms of migration
from a legacy control system to an SOA control system. The successful migration of a highly
integrated process control system, without reducing reliability or availability and, at the same …