公开(公告)号：US20230315673A1

公开(公告)日：2023-10-05

申请号：US18008387

申请日：2020-06-11

Applicant: Hitachi High-Tech Corporation

Inventor： Kazushi YAMASHINA ,  Takashi SAEGUSA ,  Yoshiro GUNJI ,  Tetsuji OHSAWA ,  Yutaka KASAI ,  Junichi KITAMURA ,  Naoya ISHIGAKI ,  Shusaku MAEDA ,  Yoshikuni YOKOSE

IPC: G06F13/42 ,  G01R31/26 ,  G06F13/34

CPC classification number: G06F13/4247 ,  G01R31/2601 ,  G06F13/34

Abstract: A distributed control system includes a tree topology network or a daisy-chain network including a communication parent station, communication child stations, and a plurality of communication paths among the communication parent station and the communication child stations, in which the communication parent station and the communication child stations include a scheduling unit that controls a transfer cycle that is temporal intervals of data transfer. The scheduling unit sets the transfer cycle that is the fastest out of a plurality of the data as a reference cycle, counts the number of times each time the reference cycle elapses, and imparts a value of the number of times to the reference cycle as a cycle number. When the cycle number reaches an optional number, the number of times is returned to an initial value, which makes one cycle of transfer control, and the transfer control is repeatedly executed. For the timing of the reference cycle at which the data is transferred, the scheduling unit defines a cycle number to which the reference cycle corresponds, on the basis of first information corresponding to the data.

公开(公告)号：US20250168092A1

公开(公告)日：2025-05-22

申请号：US18840551

申请日：2022-12-29

Applicant: Hitachi High-Tech Corporation

Inventor： Kazushi YAMASHINA ,  Tetsuji OHSAWA ,  Yuichiro SHIGA

IPC: H04L43/0823 ,  H04L1/00

Abstract: The present invention addresses the problem of inferring the cause of a fault in a distributed system configured from a plurality of distributed devices. A distributed system configured from a plurality of distributed devices capable of communicating over a communication channel, wherein each of the distributed devices has: a communication port for receiving a communication signal from another distributed device; a storage unit for storing device information which expresses properties of the distributed system; and an inspection unit for detecting a communication error via the communication signal, indicating said communication error, and inferring the cause of the communication error by comparing the device information with the communication error information, which includes the time when the communication error occurred, the communication error type and the place where the communication error was detected.