Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 232)

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RSView32 User’s Guide
press action. When an operator presses the button, the command is
issued, a new file is created, and data is logged to that file.
Deleting ODBC database records and .dbf log files
If your data log model uses the ODBC database format, you can
purge old records from the database using standard relational database
tools or SQL queries. You can also configure RSView32 to delete
(purge) records in the ODBC database after a specified time.
If your data log model uses the dBASE IV format, you can delete .dbf
log file sets after a specified period or once a specified number of file
sets has been created. If you never want .dbf files deleted, leave the
check boxes under Delete Oldest Files blank.
Data log file sets are deleted only when a new file set is created. So, if
your project creates a new file set each day and deletes the oldest file
set every third day, your project will have file sets for the three
previous days’ data as well as a file set for the current day.