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Inhibits and Overrides: Applications Seen in a Safety Perspective
Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Engineering Cybernetics.
2011 (English)MasteroppgaveStudent thesis
Abstract [en]
The main purpose of this thesis has been to identify the general usage of the applications textit{inhibit} and textit{override} for a collection of installations operated by Statoil ASA. The applications are provided by a Safety and Automation System (SAS) that performs monitoring, control and safeguarding of the plant and its process. Logs that keep track of the SAS operator's actions and other facility-related events have been received from each installation, and regarded with respect to: * the general evolvement and trend of the application usage * instances of inhibits/overrides of long-term character * redundant signals that are inhibited/overridden simultaneously * critical time periods that exhibit high activity * tags that are frequently involved in the application usage The results that were obtained for each above-mentioned point made it possible to give a stetement of how the installations are controlled through utilization of the safety-impairing, but useful applications.
Place, publisher, year, edition, pages
Institutt for teknisk kybernetikk , 2011. , 95 p.
Keyword [no]
ntnudaim:5953, MTTK teknisk kybernetikk, Reguleringsteknikk
URN: urn:nbn:no:ntnu:diva-13176Local ID: ntnudaim:5953OAI: diva2:434334
Available from: 2011-08-15 Created: 2011-08-15

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