The"UNION" clause for the data extraction query is not support by the IMDB. Therefore the "Historical Log Window" will only display system messages even when set to view all message types.
Movicon Help on Line - Rel. 11.7.1301
Some of the parameters which are used for the IMDB parameters are the same ones used whether recording a historical Log, a Data Logger or a variable trace, etc. The significance of these parameters are described Below:
Enables the use of the IMDB manager to record data. In this case data will not be recorded in DataBase format through the ODBC drivers.
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The"UNION" clause for the data extraction query is not support by the IMDB. Therefore the "Historical Log Window" will only display system messages even when set to view all message types. |
A "The table <Table Name> has been created" message will be shown in the output window upon each project startup. The difference in messages when recording with IMDB and not ODBC is that messages for IMDB do not indicate table creations in physical databases but indicate that virtual tables have been created in RAM by taking data from the ".dat" file.
When this property is enabled, the system's global memory will be used for saving data and not that of the process. This option is especially indicated when using WinCE as operating system because the Movicon CE process memory has a limit of 32 Mbytes.
Further more this option is needed also when wanting to access data through external ActiveXs or libraries. In this way the IMDB tables are made available in ram and can be accessed using appropriated ActiveX or library functions.
Data is always saved in text files with the ".dat" extension and by enabling this option will also allow data to be saved in files in XML format.
Data is always saved in a text file with the ".dat" extension. When activating this option you will be able to save data in a CSV file which also includes the field names in the first row.
You can also customize the field delimitor character (Tab used for default) by editing the "XMLcIMDBDelimiter" tag directly in the project files. The ".movprj" project files must be modified for the Historical Log, the ".movrealtimedb" file must be modified for the Variable Trace and the ".movdlrec" file for the DataLoggers or Recipes. In this last case, it will also be possible to modify the xml tag through the XML Code Explorer window and possible to specify a different separator for each inserted DataLogger or Recipe object.
The ".dat" file used for recording data is crypted with a proprietary algorithm and with the public domain algorithm. XML files are not crypted.
This setting represents the time, in seconds, when the data is unloaded from memory to files.
This setting allows you to define the maximum number of records the Historical Log can execute. Once this limit had been reached, the data will start recycling. However, data with ages older than the maximum age set will be deleted even when the max. number of records has not yet been reached. This function is disabled when set at the '0' value which means that there are no restrictions to the number of records that can be executed.
