selected time span as the default values. You see them in the value boxes next to
the time span start and end times.
•
If you change your selection, the value boxes show new default values.
HistoryUpdating_CurrentHistoryTrend.jpg
Figure 5.7.1-1 Trend of a variable from a non-periodic table
Description
Display term
The value used as the start value for a time
span based history value updating. Initialized
with the value of the variable at the start time of
the time span.
Start value
The start time of the time span.
Start time
The end time of the time span.
End time
The value used as the end value for a time span
based history value updating. Initialized with the
value of the variable at the end time of the time
span.
End value
79
COM600 series, Version 5.0
1MRS756739
Data Historian Operator's Manual
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