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:
Sep. 11, 2007
Filed:
Jun. 02, 2004
Applicant:
Itaru Tanabe, Naka, JP;
Inventor:
Itaru Tanabe, Naka, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
To offer a control system that is not only equipped with a high fail-safe function but also capable of avoiding erroneous failure detection. The CPUoutputs a drive signal DC for driving the load L according to the input signals from sensors Sand Sby means of the load drive element. The monitor ICdetects abnormal condition of equipment and outputs the first reset signal RESfor resetting the CPUand also outputs the second reset signal RESwhen the first reset signal REShas been outputted for a specified number of times. The compulsory turn-off circuitstops the output to the load L according to the second reset signal RESoutputted from the monitor IC