Using The Filter Functionality - ABB COM600 series Data Historian Operator's Manual

5.2.3.
64
COM600 series, Version 5.0
Data Historian Operator's Manual
Button Description
You can drag the legend's items (rows) to change their order. This also
changes the order of curves in the plot.
This is useful, for example, if the plot of a variable you want to view is
behind other plots.
You can also temporarily hide the plot that covers the one you are
interested in or change the plot area limits of variable items.
Buttons used to hide or reveal the 'Limits' and 'Statistics' items.

Using the filter functionality

The filter column provides a very flexible interface for modifying the display of any of
the selected variables. The key principle is that the user can define a filter to perform
the desired operations by typing in the keywords defined in the filter syntax. The syntax
and keywords are described in the following paragraphs and tables.
The syntax consists of a filter selection part and the time period part. For example
"AVG10MIN" calculates and shows the averages over ten minute time spans. Several
filters can also be applied one after another. They are separated with the symbol "|", for
example "AVG1MIN|MAX1H" produces the hourly maximum values from the one
minute average values.
Vtrin automatically changes history tables, if this optimizes
the search. You can set off this optimization by starting with
an empty filter, that is, the "|" sign. For example, "AVG1MIN"
is optimized while" |AVG1MIN" is not optimized.
To enter the desired filter syntax, double-click the filter field of the selected variable.
This opens the field in editing mode. You can now type in the desired filter. A drop-
down menu appears after the first character is typed showing all filter keywords beginning
with the letter. Erase all letters typed to retrieve all available filter types.
To remove the filter press Delete or erase the field empty and press Enter.
If no time period is defined, the filter takes the whole visible time period as input. Thus,
for example, "AVG" produces the average over the selected time period. To apply the
filter with a selected time period append the filter syntax with a number and one of the
pre-defined time identifiers. For example, "AVG10MIN" returns the ten minute averages
for the selected time period.
Table 5.2.3-1 The set of available filters
AAVG Arithmetic Average
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