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:
Dec. 01, 1987
Filed:
Nov. 14, 1985
Applicant:
Inventor:
Akihisa Ueda, Niigata, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 16 ; 371 29 ; 371 62 ;
Abstract
A system arrangement for detecting the uncontrollable operation of a control system includes an interrupt signal generating circuit which issues the interrupt signal to the central processing unit (CPU) on a hardware basis so that the CPU is interrupted at a constant interval even during the uncontrollable operation of the control system. The CPU responds to the interrupt signal to initiate the interrupt processing routine, which then detects the state of uncontrollable operation basing on the trace of the computational processes carried out by the CPU.