Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 209)

Configuring data logging
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7–9
String table (optional)—stores string tag values
For a detailed description of the tables’ contents, see page 16-17.
ODBC backup files are stored as binary files with the extension .obf.
You cannot view the contents of the .obf files.
How ODBC tables are named
The ODBC tables are created with the default names TagTable,
FloatTable, and StringTable. However, you can edit these names
before creating the tables, or specify different tables to use, in the Data
Log Setup dialog box. If you specify a backup path for an ODBC
model, RSView32 names the backup log files as described for narrow
.dbf files. If you use long file names you can specify a log file identifier
string for the backup file names.
Using an existing ODBC data source
You can log data to an existing ODBC data source, but its tables must
contain fields that are formatted for the RSView32 data log. There are
two ways to prepare tables for data logging to an existing database:
set up the RSView32 data log fields in the existing ODBC tables
before setting up your data log model
automatically or manually create new tables in the existing database
in the Data Log Setup dialog box