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RSView Supervisory Edition Installation Guide

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string, which the user defined to help identify the data. (Float) indicates<br />

that this file contains analog or digital tag values.<br />

ODBC database storage format<br />

Use the ODBC database storage format to store data in an ODBC<br />

data source such as Oracle or Microsoft SQL Server. The ODBC<br />

format stores data in up to three tables:<br />

• Tag table (optional)—stores tag names in an index so they can be<br />

referenced using a 2- or 4-byte numeric field (rather than a 40-byte<br />

character field) in the float and string tables.<br />

• Float table—stores analog and digital tag values.<br />

• String table (optional)—stores string tag values.<br />

For details about the contents of the tables, see page C-5.<br />

ODBC backup files are stored as binary files with the extension .obf.<br />

You cannot view the contents of the .obf files.<br />

How ODBC tables are named<br />

The ODBC tables are created with the default names TagTable,<br />

FloatTable, and StringTable. In the Data Log Models dialog box, you<br />

can edit these names before creating the tables, or you can specify the<br />

names of different tables.<br />

If you specify a backup path for an ODBC model, <strong>RSView</strong> names the<br />

backup log files as described on page 13-3.<br />

Creating data log models<br />

To set up a data log model, in the Data Log Models editor specify:<br />

• which log file format to use.<br />

• where to store data log files (primary or secondary paths).<br />

13–4 <strong>RSView</strong> <strong>Supervisory</strong> <strong>Edition</strong> User’s <strong>Guide</strong>

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