Title:
REDUNDANCY SYSTEM OF DIGITAL CONTROLLER SYSTEM
Document Type and Number:
Japanese Patent JPS5486081
Kind Code:
A
Abstract:
PURPOSE:To minimize spreading effect caused by the disorder of system by providing two loop stations actuating as the primary and the secondary with respect to the same control loop by exchanging from the primary to the secondary for the abnormal condition. CONSTITUTION:Main loop station 16 takes in the detecting value PV with the control of control station to produce the operation power MV. The transmission between the loop station and control station is operated through the analog bus 11 and digital bus 12. The control station controls concurrently the secondary control station 17, by which the outputs of both stations are followed-up. Now, with the disorder of the main station, the relay is actuated to change the secondary loop station by actuating the switch 19.
Inventors:
TAKADA KEISUKE
OSAGAWA KAZUTAKA
OSAGAWA KAZUTAKA
Application Number:
JP15286177A
Publication Date:
July 09, 1979
Filing Date:
December 21, 1977
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
G05B9/03; G05B15/02; (IPC1-7): G05B9/03; G05B15/02
Domestic Patent References:
| JPS4912747A | 1974-02-04 | |||
| JPS5183978A | 1976-07-22 |