Title:
GATEWAY DEVICE, GATEWAY CONTROL METHOD, AND GATEWAY CONTROL PROGRAM
Document Type and Number:
WIPO Patent Application WO/2022/239116
Kind Code:
A1
Abstract:
A gateway device (10) according to the present invention relays safety data communication between a safety input/output unit (40) and a safety controller (20) that controls the safety input/output unit (40). The gateway device (10) comprises a state monitoring control unit (130) and a safety control unit (120). The state monitoring control unit (130) manages a control state that corresponds to the state of a safety control system (80) and that is a safe state or an unsafe state. The state monitoring control unit (130) applies safety data that the gateway device (10) has received from the safety input/output unit (40) to state transition information indicative of state transition of the control state, and thereby controls the state transition of the control state. When the control state is changed from the unsafe state to the safe state, the safety control unit (120) generates safety data that indicates the safe state and that is transmitted to the safety input/output unit (40).
Inventors:
MIYAZAKI KIYOHITO (JP)
Application Number:
PCT/JP2021/017904
Publication Date:
November 17, 2022
Filing Date:
May 11, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G05B23/02; G05B19/048; H04L12/66
Domestic Patent References:
| WO2003001306A1 | 2003-01-03 | |||
| WO2014041829A1 | 2014-03-20 |
Foreign References:
| JP2015100356A | 2015-06-04 | |||
| CN106911673A | 2017-06-30 | |||
| JP2008507929A | 2008-03-13 |
Attorney, Agent or Firm:
CROSS-BORDER PATENT FIRM (JP)
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