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. 06, 1992
Filed:
Aug. 15, 1990
Applicant:
Inventors:
Mark A Lucak, Saline, MI (US);
Jonathon R Engdahl, Saline, MI (US);
Michael T Klein, Ann Arbor, MI (US);
Assignee:
Allen-Bradley Company, Inc., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ; G08C / ;
U.S. Cl.
CPC ...
371 32 ; 371 33 ;
Abstract
An interface circuit couples a host processor in an industrial control system to a local area communications network. In includes a protocol machine for receiving and transmitting messages on the network and an interface controller which is programmed to implement one or more protocols. As a message is received by the protocol machine, the interface controller anticipates a responsive message which it writes to the protocol machine even as the message is being received. If the message is received accurately, the responsive message is transmitted without delay.