Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Paul G. Kucharski0
Anthony Gerard Gibart0
Charles Martin Rischar0
Joseph Paul Izzo0
Michael Dean Kalan0
Date of Patent
October 23, 2007
0Patent Application Number
106638630
Date Filed
September 16, 2003
0Patent Primary Examiner
Patent abstract
A safety controller executes a control program in two processing units to detect processor failure by comparison of the execution in each unit. This comparison is made rapid by synchronizing the input variables at the beginning of the task and comparing output variables at a conclusion of the task, avoiding line-by-line comparison of input and output variables. Intermediate variables, that are neither input nor output values, are compared at a less frequent interval.
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