You manually adjust the automation server clock when you configure or commission an automation server. When the automation server is running on a fully commissioned site it is important that you use a network time server to avoid drifting time in the automation server.
The Date & Time view displays the local time in the perspective of the automation server time zone settings and not in the perspective of WorkStation.
In WorkStation, in the System Tree pane, select the automation server you want to configure.
Click the Control Panel tab.
Click Network time and time zones .
In the automation server Date & time view, select Manually adjust date & time .
In the Local date & time boxes, enter the date and time of the automation server.
Click the Save button