In the [System Settings] window click [Display
Unit]. In the [Display] tab, when the [Reflect in Device/PLC] check
box is selected, change screen switches set up with the [Previous
Screen] function may not work properly.
In the [System Settings] window, click [Display
Unit]. In the [Display] tab, when [Standby Mode]=[Screen Change],
you cannot use a [Previous Screen] switch to return to the screen
that displayed before the Standby Mode Time elapsed.