The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2007
Filed:
Sep. 16, 2003
Anthony Gerard Gibart, New Berlin, WI (US);
Paul G. Kucharski, Waukesha, WI (US);
Joseph Paul Izzo, New Berlin, WI (US);
Michael Dean Kalan, Highland Heights, OH (US);
Charles Martin Rischar, Chardon, OH (US);
Anthony Gerard Gibart, New Berlin, WI (US);
Paul G. Kucharski, Waukesha, WI (US);
Joseph Paul Izzo, New Berlin, WI (US);
Michael Dean Kalan, Highland Heights, OH (US);
Charles Martin Rischar, Chardon, OH (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
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.