Rockwell-automation FactoryTalk Historian SE ProcessBook 3.2 User Guid Manual de usuario descargar pdf (Pagina 281)

7 ● Data Streams

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4. Click the Tag Search arrow, and then click PI calculation. The PI

Calculation Data dialog box appears.

If you want to display the ODBC Data dialog box instead of the PI

Calculation Data dialog box, then click the Tag Search arrow, and then

select ODBC.

5. Under Saved Data Sets, click the data set you want to add to the

trend.

6. Under Data Set Columns, select a column(s) to be plotted in the trend

(use the SHIFT or CTRL keys to select more than one column).

Value

Value of the expression for the calculation interval and type as of the

time stamp. In the case of summary data sets, this column holds the

value of the tag.

Total

The totalized value (time integral) of a tag over a given time,

according to values stored in the archive.

Average

Average value of the expression for the calculation interval and type.

Minimum

Minimum value of the expression for the calculation interval and type.

Maximum

Maximum value of the expression for the calculation interval and type.

PctGood

The time percentage, over a given range, when a tag's archived

values are good (not digital states).

Range

The difference between a tag's maximum and minimum values during

a given time, according to values stored in the archive.

StdDev

The time-weighted standard deviation of a tag over a given time,

according to values stored in the archive.

PStDev

The standard deviation of two or more arguments, where those

arguments represent the whole population.

Count

The number of events for a point over a given time.

7. Click OK.

Until you select a data set and at least one column, the OK button is

dimmed.

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Rockwell-automation FactoryTalk Historian SE ProcessBook 3.2 User Guid Manual de usuario Pagina 281