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:
May. 16, 1995
Filed:
Apr. 28, 1992
David A DiCarlo, Windsor, OH (US);
William E Floro, Willoughby, OH (US);
Mike Keith, Willowick, OH (US);
John J Baier, Saline, MI (US);
Jeffrey H Campau, Pinckney, MI (US);
Daniel P Noonen, Saline, MI (US);
Stuart B Siegel, Clinton, MI (US);
Allen-Bradley Company, Inc., Milwaukee, WI (US);
Abstract
Data is exchanged between two modules of a programmable controller by originator module writing the information in an interface memory in one of the modules and the recipient module reading the information from the memory. An initialization procedure is performed before any information is exchanged in that manner. The module containing the memory writes the size of the memory for reading by the other module. Sets of test data are stored in the memory by each module and checked by the other module to determine if data can be passed accurately between the modules in both directions. Then data identifying the type of one of the modules is exchanged to insure that the other module knows the type of module with which it is dealing.