US 12,141,569 B2
Redundant system and load drive control device
Yoshiaki Mizuhashi, Hitachinaka (JP); Mitsuhiko Watanabe, Hitachinaka (JP); Yoshitaka Abe, Hitachinaka (JP); and Mamoru Ogura, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/769,417
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Oct. 9, 2020, PCT No. PCT/JP2020/038236
§ 371(c)(1), (2) Date Apr. 15, 2022,
PCT Pub. No. WO2021/075361, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 2019-191241 (JP), filed on Oct. 18, 2019.
Prior Publication US 2024/0126528 A1, Apr. 18, 2024
Int. Cl. G06F 8/65 (2018.01)
CPC G06F 8/65 (2013.01) 17 Claims
OG exemplary drawing
 
1. A redundant system that controls one load by a plurality of control systems having a redundant configuration, the redundant system comprising:
a non-transitory computer-readable medium configured to store instructions executable by one or more processors, the instructions, when executed by the one or more processors, cause:
when an update program signal for the plurality of control systems is received, an update of a control program for each of the plurality of control systems in a predetermined order to be individually executed;
when a start request of the load is received during the execution of the update of a control program of one predetermined system, the load to be controlled by a system other than the one predetermined system; and
during control of the load by the system other than the one predetermined system:
the update of the control program of the one predetermined system to be continued; or
a rollback of the control program of the one predetermined system to be executed, and
wherein a control program update state of each system of the plurality of control systems is managed as a flag.