Plant control system and interlock factor specifying method
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United States of America Patent
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Feb 18, 2014
Grant Date -
Sep 23, 2010
app pub date -
Jan 24, 2006
filing date -
Jan 24, 2006
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Abstract
This disclosure describes, for a example, a plant control system comprising: program editing means for creating a control program including an interlock condition and diagnosis of interlock; plant control means for executing a program object in the control program; and interlock diagnosing means for updating and displaying satisfaction/dissatisfaction of the interlock condition at a predetermined point before the present, further specifying only a source factor variable of the dissatisfaction even if plural stages of interlock circuits are formed, and automatically displaying the source factor variable in a graphic language, the interlock diagnosing means having a logical operation unit and a display unit.
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