JAMES P FERREIRA
Radio and Television Technicians in Amherst, NH
License number
Massachusetts 8558
Type
Master Technician
Address
Address
Amherst, NH
Professional information
Intelligent Process Control Communication System And Method Having Capability To Time Align Corresponding Data Sets
US Patent:
5519603, May 21, 1996
Filed:
Jul 12, 1994
Appl. No.:
8/273773
Inventors:
James D. Allbery - Farmington Hills MI
Peter A. Troisi - Westford MA
Susan J. Johnson - Novi MI
James H. Cullen - Bedford MA
Richard L. Butler - Toledo OH
James P. Ferreira - Amherst NH
Joseph Ellison - Detroit MI
Stanley R. Nunn - Novi MI
Chiman L. Patel - Andover MA
James E. Uban - Wellesley MA
Dale H. Schultz - Midland MI
Peter A. Troisi - Westford MA
Susan J. Johnson - Novi MI
James H. Cullen - Bedford MA
Richard L. Butler - Toledo OH
James P. Ferreira - Amherst NH
Joseph Ellison - Detroit MI
Stanley R. Nunn - Novi MI
Chiman L. Patel - Andover MA
James E. Uban - Wellesley MA
Dale H. Schultz - Midland MI
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
G05B 1500
US Classification:
364133
Abstract:
An intelligent front-end communication system which is interposed between a plurality of actively redundant process control computers and a computer network. The intelligent front end communication system includes at least one front end computer which is coupled to the computer network, and a serial communication interface which is coupled between the actively redundant process control computers and the front end computer. The serial communication interface transmits sequential sets of dynamic data from the actively redundant process control computers to the front end computer. The front end computer includes a plurality of reflective or shadow memory buffers for storing and time aligning corresponding sets of dynamic data which are asynchronously received from the serial communication interface.