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:
Jul. 10, 2007
Filed:
Dec. 26, 2003
Akio Ono, Numazu, JP;
Akio Ono, Numazu, JP;
OMRON Corporation, Kyoto, JP;
Abstract
A unit for a programmable controller includes a user program memory storing a user program to be read out for carrying out a calculation process and a backup memory storing data with the same contents as the user program stored in the user program memory. An abnormality detector is provided for detecting a memory abnormality by comparing user data stored in the user memory and the backup memory while the programmable controller is operated. If a memory abnormality is detected, a restoration device repairs the data at the position where the abnormality was detected with the data at the corresponding position of the backup memory and the cyclic operation of the programmable controller is continued thereafter.