RSView Supervisory Edition Installation Guide

13 • USING DATA LOGGING• • • • •• MM is the month.• DD is the day.• NNNN is the sequential file identifier. This number indicates the sequence files werecreated in. You can have up to 9999 file sets per day. At midnight, the sequence startsat 0000 again.• is a text string you can specify to help identify the logfile. The maximum string length is 20 characters.• is the file type. The type is enclosed in parentheses. There are three filetypes: Tagname, Float (for analog and digital tag values), and String.13 • PlaceholderExample: Long file nameThe log file named 2004 10 30 0004 Oven Temperatures (Float).dat was createdOctober 30 2004. The 0004 indicates that this is the fourth file set created that day. OvenTemperatures is the log file identifier string, which the user defined to help identify thedata. (Float) indicates that this file contains analog or digital tag values.ODBC database storage formatUse the ODBC database storage format to store data in an ODBC data source such asOracle or Microsoft SQL Server. The ODBC format stores data in up to three tables:• Tag table (optional)—stores tag names in an index so they can be referenced using a2- or 4-byte numeric field (rather than a 40-byte character field) in the float and stringtables.• Float table—stores analog and digital tag values.• String table (optional)—stores string tag values.For details about the contents of the tables, see page C-4.ODBC backup files are stored as binary files with the extension .obf. You cannot view thecontents of the .obf files.How ODBC tables are namedThe ODBC tables are created with the default names TagTable, FloatTable, andStringTable. In the Data Log Models dialog box, you can edit these names before creatingthe tables, or you can specify the names of different tables.13-3