05416908 is referenced by 17 patents and cites 19 patents.

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.

Title
Interface between industrial controller components using common memory
Application Number
7/875173
Publication Number
5416908
Application Date
April 28, 1992
Publication Date
May 16, 1995
Inventor
Stuart B Siegel
Clinton
MI, US
Daniel P Noonen
Saline
MI, US
Jeffrey H Campau
Pinckney
MI, US
John J Baier
Saline
MI, US
Mike Keith
Willowick
OH, US
William E Floro
Willoughby
OH, US
David A DiCarlo
Windsor
OH, US
Agent
Quarles & Brady
Assignee
Allen Bradley Company
WI, US
IPC
G06F 13/14
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