Toshiba nv-pack, Manual

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Unified Controller nv-pack series typeFR Virtualization Functional Manual
55
B.1.2
When the host system clock is changed
When the system clock ((2) in the figure) of the PLC (host) is changed by nV-Tool etc.,
the change is immediately reflected in the hardware clock of the virtual machine ((3) in
the figure). At this time, it is not reflected in the Windows system clock ((4) in the figure),
but depending on the Windows setting / environment, the hardware clock may be
referenced and may be reflected to the Windows system clock ((4) in the figure).
Host OS
typeFR machine
Guest OS (Windows)
Virtual machine
(4) System clock
(3) Hardware clock
(1) Hardware clock
(2) System clock
FigureB.3. When the host system clock is changed
B.1.3
When the Windows system clock is changed
When Windows's system clock ((4) in the figure) is changed on Windows, the change is
immediately reflected in the hardware clock of the virtual machine ((3) in the figure).
Changes on Windows will not be reflected in the host system clock or hardware clock.
Therefore, when Windows restarts, that change will be reset.
Host OS
typeFR machine
Guest OS (Windows)
Virtual machine
(4) System clock
(3) Hardware clock
(1) Hardware clock
(2) System clock
FigureB.4. When the Windows system clock is changed