Process control system, process control apparatus, and program update method
AssigneeYokogawa Electric Corporation
InventorsYusuke Takeno, Takeshi Ohno
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Abstract
A process control system includes a first process control apparatus and a second process control apparatus. The second process control apparatus includes a data takeover unit configured to acquire, from the first process control apparatus, takeover data required to be taken over to continue a system function when switching from the first process control apparatus to the second process control apparatus is performed and restore the takeover data in the second process control apparatus and a timing determiner configured to determine a timing when the switching will be performed.
Claims15
A program update method for use in a process control system comprising a first process control apparatus which does not include an online update manager of a system program and a second process control apparatus which includes the online update manager, the program update method comprising:
- acquiring, by the online update manager of the second process control apparatus, takeover data, which is data required to be taken over so that a system function is continued, from the first process control apparatus when switching from the first process control apparatus to the second process control apparatus is performed and restoring the takeover data in the second process control apparatus;
- and
- determining, by the online update manager of the second process control apparatus, a timing when the switching will be performed,
- wherein
- when a function extension of an online update function of the process control system is performed, an extension function is embedded into the online update manager of the second process control apparatus, and the extension function is not embedded into the first process control apparatus.
A process control system, comprising:
- a first process control apparatus which does not include an online update manager of a system program, and comprises a first memory;
- and a first processor connected to the first memory;
- and
- a second process control apparatus which includes the online update manager, and comprises a second memory;
- and a second processor connected to the second memory,
- wherein the second processor is configured to make the online update manager of the second process control apparatus:
- acquire, from the first process control apparatus, takeover data which is required to be taken over to continue a system function, when switching from the first process control apparatus to the second process control apparatus is performed;
- restore the takeover data in the second process control apparatus;
- and
- determine a timing when the switching will be performed, and
- wherein
- when a function extension of an online update function of the process control system is performed, an extension function is embedded into the online update manager of the second process control apparatus, and the extension function is not embedded into the first process control apparatus.
A process control apparatus in which switching from another process control apparatus which does not include an online update manager of a system program is performed, the process control apparatus including the online update manager, the online update manager of the process control apparatus comprising:
- a memory;
- and
- a processor connected to the memory, the processor being configured to:
- acquire, from the another apparatus, takeover data which is required to be taken over from the another apparatus to continue a system function when the switching is performed and restore the takeover data in the process control apparatus;
- and
- determine a timing when the switching will be performed,
- wherein
- when a function extension of an online update function of a process control system is performed, an extension function is embedded into the online update manager of the process control apparatus, and the extension function is not embedded into the another process control apparatus.
Dependencies are inferred from the claim text.