Data processing: generic control systems or specific application – Generic control system – apparatus or process – Plural processors
Reexamination Certificate
2007-11-06
2007-11-06
Pham, Thomas K. (Department: 2121)
Data processing: generic control systems or specific application
Generic control system, apparatus or process
Plural processors
C700S247000
Reexamination Certificate
active
10721411
ABSTRACT:
A multiplexing control system has a common process input/output unit for distributing process signals from sensors for measuring the same state variable of a process to digital controllers. One process input/output unit for inputting/outputting a process signal between the multiplexing control system and plant is provided for each process signal. The process input/output unit for the process signal of high importance is triplexed. A process controller having an operating function is provided to each of the triplexed process input/output units. A process input/output unit for the process signal of intermediate importance is diplexed. A process input/output unit for the process signal of low importance is monoplexed. The process signals of the diplexed process input/output units and the monoplexed process input/output unit are controlled by a controller having a master right among the process controllers.
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Akatsu Tohru
Asakura Kazuyasu
Maruyama Yoshio
Miura Kazuhiko
Mori Yukiko
Dickstein & Shapiro LLP
Hitachi , Ltd.
Pham Thomas K.
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