Applet Time Intervals 
A block of time determined by the time, duration, and duration unit values used to display a section of a historical or time-based chart in your applet.
The chart uses the Time value as the start time. Timeuses the day@HH:mm:ssformat where the dayvalue can be Today, Yesterday, or Monday through Sunday. The time is in 24-hour format and must include minutes and seconds.
Example
To view data for today from 4:30 PM to 5:30 PM, the Time value should be set to Today@16:30:00. The Durationvalue should be 1 and the DurationUnitsvalue should be set to hours.
You can also do the following in your applet:
Select specific start and end dates
Modify the duration (width)
Select time periods or schedules that your system administrator defined
In addition to using the navigation bar to select a time interval, you can also select a time interval in a historical or time-related chart by choosing .