Siemens SIMATIC 505 User Manual page 213

Defining a Data Point to Trend
12 • • • • FTTrend
Compact Database When Going Online check box, when checked, helps
to limit the amount of disk space used by FTTrend. When data is stored
in a database some of the fields are not completely full. By compacting
the trended data removes the spaces between these fields.
The data base filename and location are user defined. A new path and
filename can entered in the Database Path selection box. The Browse
button is used to help in the location of file folders and pre-established
files.
Deleting data that will not be reviewed can control the amount of data
stored in the database. This is accomplished by selecting a time frame of
data to keep and deleting the unwanted portion. To delete the unwanted
data select Delete Every radio button. Then enter the time frame to delete
the past data.
To create a data point to trend:
Select Data from under the Setup Menu
Result: Graph Data dialog box appears (figure 16)
Figure 16
Real time data and logged data can both be plotted together or separately.
Real Time Data point Setup
To add a real time point to plot, select the Add Real Time Point button.
Result: Data Point – Real Time dialog box appears (Figure 17)
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