Title:
SCADA WEB HMI SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/248339
Kind Code:
A1
Abstract:
The present invention provides a SCADA web HMI system that can prevent delay in updates of display on screens of HMI client machines and stoppage of a server machine even when a processing load on the server machine is large. A SCADA server machine comprises a communication driver and a client management unit that is connected one-to-one with HMI client machines. The client management unit comprises: a reception thread that receives signal data from the communication driver; first and second signal data buffers that can store the signal data, which is received by the reception thread, in association with a signal data identifier for each data type; and a transmission thread that reads signal data stored in the first or second signal data buffer, and transmits the read signal data to an HMI client machine. While the transmission thread is reading signal data from one of the first and second signal data buffers and transmitting the read signal data to an HMI client machine, signal data stored in the other one of the first and second signal data buffers is overwritten.
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Inventors:
HASHIZUME TAKAHARU (JP)
NOJIMA AKIRA (JP)
SHIMIZU NOBUO (JP)
NOJIMA AKIRA (JP)
SHIMIZU NOBUO (JP)
Application Number:
PCT/JP2022/024703
Publication Date:
December 28, 2023
Filing Date:
June 21, 2022
Export Citation:
Assignee:
TOSHIBA MITSUBISHI ELECTRIC INDUSTRIAL SYSTEMS CORP (JP)
International Classes:
H04L67/5651; H04Q9/00
Domestic Patent References:
| WO2021245752A1 | 2021-12-09 | |||
| WO2017168674A1 | 2017-10-05 |
Foreign References:
| JP2020013527A | 2020-01-23 | |||
| JP2014003590A | 2014-01-09 |
Attorney, Agent or Firm:
TAKADA, TAKAHASHI & PARTNERS (JP)
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