There are two methods.

[Change the setting on V series]
Change setting in Local mode > [Comm. setting] and press [Apply] switch.

To restore the screen data setting, press [Restore Screen Data Setting] > [Reset PLCx Only] or [Reset All] (PLC1-8).

[Change the setting in the screen program]
Setting location: [System Setting] > [Hardware Setting] > [PLCx Properties]