Rockwell Automation FactoryTalk Historian Classic User Guide - Manual (Page 72)

Chapter 4 Analyzing FactoryTalk Historian Classic Data
you make a change to the settings on the Time Selection
toolbar, you must click Refresh to view the change.
• The All Times button is used to show all data that has
ever been collected, without specifying the start and end times.
This is especially useful if you do not know the start and end
date for which data has been collected.
• The Time Range button enables you to specify the start
and end times to which the data will be restricted. Use this
button if you want to report only on data between a specific
beginning and ending time.
• The Time Span button restricts time to the past by a
unit of time. This button is useful if you want to show all data
from the past 24 hours, the past 7 days, or the past year. When
you use this button with an auto-refresh chart and data that is
currently being collected, the chart will continue to refresh
with the current date/time as the end time.
• The Past Time from End Time button uses a unit of
time before the specified end time. For example, this button is
useful if you want to show all data from the week before
August 2, 2005.
• The Future Time from Start Time button uses a unit
of time after the specified start time. For example, this button
is useful if you want to show all data from the week after
August 2, 2005.
To change a date or time on the Time Selection toolbar, use the
drop-down arrow to the right of the field or type a value directly in
the field.
For our tutorial example, click All Times and then click Refresh. Your
table should look similar to the following:
72 Rockwell Automation Publication HIST-UM001K-EN-E-June 2014