Using Relative Time

For the relative time mode, a base value (such as 0:00:00.0) is used for the start time of the chart, and the end time is calculated based on the time span for the query. Switching to relative mode does not change the data shown in the chart or the actual start and end time of the trend query. Only the time axis is updated.

To use relative time

• On the View menu, in the Time group, select Relative.

For example, the following chart shows five minutes of data in relative mode. The query for the data starts at 12:00:00 and ends at 12:05:00, but the time axis shows a start time of 0:00:00 and an end time of +0:05:00.

In relative time mode:

• The times shown for the time axis cursors, if enabled, are relative times. For more information on the display format for times, see Time Offset Formats.

• The times shown in the Time Bar are relative times. The first offset time is the base time (for example, 0:00:00.000), and the second time is the time span of the specified offset. The first offset time is always set to 0:00:00 when you transition into relative mode.

  

• The Tag List shows the actual start time for the tag data.

  

• The Tag Properties dialog box shows the start time option. For more information, see Configuring Trend Options for a Tag.