公开(公告)号：US20240241804A1

公开(公告)日：2024-07-18

申请号：US18561776

申请日：2022-04-21

Applicant: Hitachi, Ltd.

Inventor： Naohiro IKEDA ,  Kotaro SHIMAMURA

IPC: G06F11/16

CPC classification number: G06F11/1679 ,  G06F11/1641

Abstract: The safety device includes a plurality of arithmetic units which output an arithmetic result of input data as arithmetic data in each control period, a first comparison unit which compares information indicating the control period at a timing at which each of the plurality of arithmetic units outputs the arithmetic data, a plurality of temporary storage units which hold the arithmetic data output by the plurality of arithmetic units, a second comparison unit configured to compare the arithmetic data held by the plurality of temporary storage units, and an output unit configured to output the arithmetic data to outside. Each of the plurality of temporary storage units outputs the arithmetic data held therein according to a comparison result from the first comparison unit, and the output unit outputs the arithmetic data output by the temporary storage units to the outside according to a comparison result from the second comparison unit.