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. 22, 2013
Filed:
May. 14, 2010
Charles M. Rischar, Chardon, OH (US);
David A. Johnston, Mentor, OH (US);
Bruce J. Moore, Mayfield Heights, OH (US);
Eugene M. Liberman, Rocky River, OH (US);
Kenwood H. Hall, Hudson, OH (US);
Charles M. Rischar, Chardon, OH (US);
David A. Johnston, Mentor, OH (US);
Bruce J. Moore, Mayfield Heights, OH (US);
Eugene M. Liberman, Rocky River, OH (US);
Kenwood H. Hall, Hudson, OH (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
The subject matter disclosed herein describes a method of allocating and persisting memory in an industrial controller without requiring a battery backup or a large capacitive storage system. Each data object is identified as static or dynamic. Static objects are further classified by whether frequent access of that data object is required. Each of the data objects is stored in non-volatile memory. The dynamic data objects and static data objects requiring frequent access are stored in volatile memory. A record of static data objects is maintained in non-volatile memory and a record of dynamic data objects is maintained in volatile memory. Upon power loss, the present value of each dynamic data object is copied to non-volatile memory. When power is restored, the values of both the dynamic data objects and the static data objects that require frequent access at run-time are copied from non-volatile memory to volatile memory.