ABB COM600 series Data Historian Operator's Manual page 62

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COM600 series, Version 5.0
Data Historian Operator's Manual
the variable data is retrieved. As the column headings are often the same, an additional
attribute related to the heading is used to specify the data source as follows:
Table 5.2.2-1 Abbreviations used in the legend column headers
Abbreviations used in the legend column headers
F = Future
P = Past
I = Item
For general graph types, the headers of the columns related to the first history data (e.g.
"Variable") and the headers of the respective calculated value columns (for example,
"Average") are shown without any abbreviation ("P", "I"). The headers related to the
first future data begin with the letter "F" (for example, "F Variable" ).
The second history data and the second future data are used only for the "XY-scales"
and the "Ordered stacked column" graph types. The abbreviations in these cases are "P2"
for the second history data headers and "I2" for the headers of the calculated value
columns of the second history data. The abbreviation "F2" (for example, "F2 Description
(Variable)") specifies the columns related to the second future data.
The columns that are typically used in a legend are related to the first history data and
the respective calculated values (see Table 5.2.2-2).
Table 5.2.2-2 List of the generally used columns in the legend
Column header Description
Item icon The item's type as an icon. The column position of this is fixed. The icons
used are described inTable 4.10-4 in 4.10, Icons.
Text The variable's description in the database, if the data is retrieved from
process history; otherwise the search specification (source and retrieved
attributes) or a freely selected text created by the definer.
Description A description text for the variable (or the history where the data is retrieved
from).
Variable The variable's name in the database. You can change the active variable
here.
Alias The alias of the variable in the database.
Unit The unit of the variable's current value in the database.
History The history table where the data is retrieved from. You can change the
active history here.
Current value The variable's updated current value.
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