Extend Project with Simple Objects Release 09/02
5–8 ProTool Co nfig ur ing Win do ws-bas ed S yste ms
Start Up Instr uctions
5.8 Archiving Process Values
Windows-based systems provide the possibility of archiving process values, i.e. saving
them on a permanent basis, and evaluating them.
Note
The internal Flash memory not permissible as the storage location for archive files in
the case of Windows CE-based units because cyclical archiving reduces the service
life of the Flash memory and, thus, the service life of the unit itself.
In this example, the process values of the tag "VAR_1" created in Section "Assigning a
tag to the input/output field (Page 3–6) should be saved in an archive. The archive, in
this case, is a text file in which the process values are stored according to the
Microsoft CSV standard.
In CSV files, all data is stored as ANSI characters and separated by separators (e.g.
semi-colons). They can be read in and edited for evaluation by other programs.
Adding a new archive
• Double click on "Archives" on the left-hand side of the project window
A new archive is created and the appropriate Properties dialog opens. The standard
setting "Start Archiving Automatically" in "Behavior on Restart" causes process
value archiving to be started automatically when the unit is activated.
• Click on the "Settings" tab control
The standard setting, "FIFO buffer" in "Behavior When Archive Full", causes the
oldest data to be overwritten when the archive is full.
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