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Title:
PLANT INSTRUMENTATION CONTROL SYSTEM, AND PROGRAM REWRITING METHOD FOR PLANT INSTRUMENTATION CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP2022130945
Kind Code:
A
Abstract:
To provide a plant instrumentation control system and a program rewriting method for the plant instrumentation control system characterized in that an unauthorized update program will not actually run.SOLUTION: Each controller 10A or 10B includes a first program memory area 12AP1 or 12BP1 where a program is stored, a second program memory area 12AP2 or 12BP2 where a program is stored, an equivalent processing unit 11A or 11B that makes the first program memory area 12AP1 or 12BP1 and the second program memory area 12AP2 or 12BP2 equivalent to each other, and an arithmetic processing unit 13A or 13B that reads input data entered at an input/output device 20 and runs the program in the first program memory area or second program memory area.SELECTED DRAWING: Figure 1

Inventors:
FUKAMI HIROKI
Application Number:
JP2021029627A
Publication Date:
September 07, 2022
Filing Date:
February 26, 2021
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G05B9/02
Attorney, Agent or Firm:
Parumo Patent Attorneys Office