Title:
CONTROLLER BACKUP METHOD
Document Type and Number:
Japanese Patent JPS61278902
Kind Code:
A
Abstract:
PURPOSE:To permit a little backup controllers to cope instantaneously with a case where a normal controller is troubled by loading control mechanism programs of M-units of controllers with priority among N-units of normal ocntrollers on a backup controller. CONSTITUTION:The control system of a power plant is provided with N-units of normal controllers 19, M-units of backup controllers 26 and a program loading device 16 provided with a function loading a function program to each controller 19. The priority order of each normal controller 19 is decided in accordance with the hourly sections of operating stages from the activation, operation and stop of the power plant on the basis of the states of the plant and controller at each stage. According to the priority order, the function program of the normal controller 19 is previously loaded on the backup controller 16. Thus the backup controllers less than the normal controllers cope instantaneously with the case where the normal controller 19 is troubled, thereby executing the backup of the control function of the troubled controller.
Inventors:
NIKAWARA SEIITSU
FUKAI MASAYUKI
FUKAI MASAYUKI
Application Number:
JP11973785A
Publication Date:
December 09, 1986
Filing Date:
June 04, 1985
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05B9/03; G06F11/20; (IPC1-7): G05B9/03
Attorney, Agent or Firm:
Masami Akimoto