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. 05, 1989
Filed:
Sep. 28, 1987
Applicant:
Inventors:
Jesse T Quatse, Corte Madera, CA (US);
Lionel Heitz, Crolles, FR;
Jacky Pergent, Carros le Neuf, FR;
Olivier Penot, Antibes, FR;
Assignee:
La Telemecanique Electrique, , FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ;
U.S. Cl.
CPC ...
364900 ; 364184 ; 36492693 ; 3649447 ; 3649448 ; 3649456 ; 371 494 ; 371 671 ; 371 683 ; 34082516 ;
Abstract
An input/output device monitors the transmission of information between a processor of a programmable controller and sensors and actuators of a process to be controlled. This device includes electronic circuits adapted for calculating the parities of the digital words which pass therethrough, these parities being compared with corresponding parities calculated by the processor which thereafter invalidates the words having two different parities.