Title:
CONTROL DEVICE, CONTROL SYSTEM, AND TIME SYNCHRONIZATION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2023/062930
Kind Code:
A1
Abstract:
This control device constitutes a control system for executing control of a controlled device, and comprises: a communication unit that transmits/receives information relating to the control device; a shared data storage unit that stores time synchronization information received, via the communication unit, from a control device serving as a time master device; a synchronization updating unit that controls the storage of time synchronization information to the shared data storage unit of the host control device by synchronizing with the performance of storage with respect to a shared data storage unit of another control device; a time management unit that detects a clock deviation amount with respect to the time master device, and stores the detected clock deviation amount in the shared data storage unit; and a mediation unit that selects the time master device on the basis of the clock deviation amount stored in the shared data storage unit, mediates with the other control device, and determines the time master device.
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Inventors:
SASAMOTO MANABU (JP)
SHIMIZU TOSHIKI (JP)
OTSUKA YUSAKU (JP)
SAKATA TERUAKI (JP)
SHIMIZU TOSHIKI (JP)
OTSUKA YUSAKU (JP)
SAKATA TERUAKI (JP)
Application Number:
PCT/JP2022/030797
Publication Date:
April 20, 2023
Filing Date:
August 12, 2022
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H04L7/00; G05B19/05; H04L12/28
Domestic Patent References:
| WO2021079599A1 | 2021-04-29 | |||
| WO2021131530A1 | 2021-07-01 |
Foreign References:
| JP2009284054A | 2009-12-03 |
Attorney, Agent or Firm:
TOU-OU PATENT FIRM (JP)
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