User Manual

Data Logger
10 DataLogger
Data can be logged and saved in the iX Developer database.
Any number of tags can be connected to a data logger, and data values irrespective
of type can be logged. A project can have multiple data loggers with different
sampling alternatives.
If you want to open a database file to inspect logged data, then you need to install
an appropriate third party database viewer tool.
Logged data can also be viewed in the trend viewer object by selecting a LogItem
for a curve in the Edit Curves dialog.
If iX Runtime is restarted at some point during the data logging, an additional
empty row is added in the Data Logger table in order to clearly visualize the
interruption in the Trend Viewer.
Note:
Loggingofdataconsumessystemresourcesandmemory. Tosavememory,itis
preferablethatallLogItemst hatshouldbeloggedwiththesamesamplingintervalsare
placedinthesamedatalogger.
Note:
Inordertoimportorexport.xls-filesMicrosoftExcelmustbeinstalled.
Any individual data logger database can be exported in csv format using the
Database Export action. It is recommended to use the database export method
rather than the backup method.
Relatedinformation
Database
Database Export
Adding aTrend ViewerObject
10.1 DataLoggingStra tegies
Logging of data can be made at time intervals or based on changed tag values.
Logging of data can be made either by collecting all s amples at every log event, or
by coll ecting only changed values. Collecting only changed values saves memory
and improves performance.
10.1.1 LoggingBasedon
TimeInterval
To collect data that changes frequently, logging data based on time interval is
recommended.
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