G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 13/36 (2006.01) G05B 15/02 (2006.01) G05B 19/042 (2006.01) G06F 15/16 (2006.01) G06F 15/46 (1990.01)
Patent
CA 2093469
INTERFACE FOR PROVIDING MULTIPLE COMPUTER SYSTEMS ACCESS TO A PROCESS CONTROL SYSTEM ABSTRACT An interface apparatus which provides communications between a process control system and a computer system comprises a first processor, a second processor, and a memory unit divided into two portions, memory A and memory B. The first processor is of a type compatible with processors utilized in modules of the process control system, the modules being connected to a first network and communicating to each other via a first protocol. The second processor is of a type compatible with processors utilized by computers of the computer system, the computers being connected to a second network and communicating to each other via a second protocol. The first processor is connected to the first network and appears like a module to all the other modules. Likewise, the second processor is connected to the second network and appears like a computer to all the other computers connected to the second network. A computer communicates to the process control system by communicating to the interface, the second processor of the interface accepting the message and storing it in memory B portion. The first processor obtains messages from memory B, communicates with the appropriate module, and stores the obtained reply in memory A portion. The second processor looks for the reply in memory portion A, and when available, fetches the reply and transmits it to the requesting computer, thereby effecting communications between the systems.
Heim Thomas W.
Kish Karl S.
Heim Thomas W.
Honeywell Inc.
Kish Karl S.
Smart & Biggar
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