![]() In Section 2, the ABB control system is described with particular focus on I/O and communication. ![]() The remainder of the paper is organized as follows. This paper reports on experiences from an ongoing project at ABB to redesign the software architecture of a control system to make it possible for different development centers to incorporate support for different I/O and communication systems. Additional, expected benefits of a component-based architecture are increased flexibility and ease of maintenance. In a case where different development centers are responsible for different parts of the functionality of a large system, a component-based architecture may be a good alternative to more traditional, monolithic architectures, usually comprising a large set of modules with many visible and invisible interdependen- cies. Interestingly, this may also require the software architecture of the developed systems to be rethought. globalization and the more competitive cli- mate make it necessary for international companies to work in new ways that maximize the synergies between business units around the world.
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