MULTIPLEXING CONTROL SYSTEM AND MULTIPLEXING METHOD THEREFOR

WIPO Patent Application WO/2001/084252

A1

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 a plant is provided for each process signal. The process input/output unit for the process signal of high criticality 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 criticality is diplexed. A process input/output unit for the process signal of low criticality is monoplexed. The process signals of the diplexed process input/output units and the monoplxed process input/output unit are controlled by a controller having a master right among the process controllers.

MIURA KAZUHIKO (JP)
TAKAHASHI SHOEI (JP)
ASAKURA KAZUYASU (JP)
MARUYAMA YOSHIO (JP)
SHIMIZU KATSUHITO (JP)
MORI YUKIKO (JP)
AKATSU TOHRU (JP)

PCT/JP2001/001430

November 08, 2001

February 26, 2001

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HITACHI LTD (JP)
MIURA KAZUHIKO (JP)
TAKAHASHI SHOEI (JP)
ASAKURA KAZUYASU (JP)
MARUYAMA YOSHIO (JP)
SHIMIZU KATSUHITO (JP)
MORI YUKIKO (JP)
AKATSU TOHRU (JP)

G05B9/03; G05B19/418; (IPC1-7): G05B9/03

JPS625402A	1987-01-12
JPH10207591A	1998-08-07
JP2000112519A	2000-04-21
JPH0962304A	1997-03-07
JPH10124408A	1998-05-15

Takada, Yukihiko (Saiwai-cho 2-chome Hitachi-shi, Ibaraki, JP)

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