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01.03.2000

 System for Control of Cooling Water Circulation / Distributed Control System

Just a few years ago prices of control systems in distributed configurations were too high comparing to central configurations, that they have been used mainly in DCS systems. Technological progress of integrated circuits and spreading of information technologies caused the costs of both solutions to be now comparable. Unification of communication networks developed by leading suppliers of automation systems and availability of their specification in form of international standards (e.g. SINEC L2 by SIEMENS - currently Profibus) caused further improvement of competition strength of distributed systems. In current solutions the digital part of the system is getting closer to process data source, and Profibus PA networks or Fieldbus Foundation allow to eliminate analog signal as a information media of measurement. A system for control of Cooling Water Circulation in "Janikosoda" S.A., developed and executed by ASKOM in 1999 is an example of consequent use of all features of distributed system and latest instrumentation technology.

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