Title:
冗長化装置
Document Type and Number:
Japanese Patent JP6774095
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent immediate switching from an active system to a standby system by minor abnormal conditions and temporary abnormal conditions, and thereby prevent degradation of an operating rate of a system due to useless switching.SOLUTION: When a main control circuit unit 21M of an active system is detected to be an inoperative state and a secondary control circuit unit 21S of a standby system is switched and operated, a switching control unit 22 performs communication by using 3-systems of communication paths M1-M3 between the main control circuit unit 21M and itself. When the main control circuit unit 21M is detected to be an inoperative state in communication paths of 2-systems or more, the secondary control circuit unit 21S is switched and operated. Thereby, even when the main control circuit unit 21M is detected to be an inoperative state in 1-system of communication path by the occurrence of minor abnormal conditions and temporary abnormal conditions, the switching from the main control circuit unit 21M of the active system to the secondary control circuit unit 21S of the standby system is prevented from being performed.SELECTED DRAWING: Figure 2
Inventors:
Noriaki Shimizu
Yasutaka Sakazume
Yasutaka Sakazume
Application Number:
JP2016226342A
Publication Date:
October 21, 2020
Filing Date:
November 21, 2016
Export Citation:
Assignee:
Carecom Co., Ltd.
International Classes:
A61G12/00; G06F11/20; H02J9/06
Domestic Patent References:
| JP2013239034A | ||||
| JP2006163455A |
Foreign References:
| US20080098249 |
Attorney, Agent or Firm:
Kazuyuki Tachibana