RSView Supervisory Edition Installation Guide

• • • • •RSVIEW SUPERVISORY EDITION USER’S GUIDEYou can set up an application to create new file sets:• periodically.• at specified times.• when a particular event occurs.You can also select Never, in which case all data is logged to one file set. Log files aresaved in the folder you specify on the Paths tab.Deleting file sets and ODBC database recordsIf a data log model uses file sets, you can set up file management to delete file sets after aspecified period or once a specified number of file sets has been created. If you neverwant file sets deleted, clear the check boxes under Delete Oldest Files.Data log file sets are deleted only when a new file set is created. If the application createsa new file set each day and deletes the oldest file set every third day, there will be file setsfor the three previous days’ data, as well as a file set for the current day.If a data log model uses the ODBC database format, you can purge old records from thedatabase using standard relational database tools or SQL queries. You can also set upRSView to delete (purge) records in the ODBC database after a specified time.For more information, see Help.Specifying when to log dataIn the Log Triggers tab of the Data Log Models editor, you specify what will trigger datato be logged and when or how frequently this will occur. You can set up logging so tagvalues are logged:• periodically (periodic logging).• only when a tag’s value changes (on-change logging).• when a particular event occurs and triggers the DataLogSnapshot command (ondemandlogging). For for more information about the DataLogSnapshot command,see page 13-11.You can also combine types of logging. For more information, see “Combining logging”on page 13-11.Choosing the data to be loggedIn the Tags in Model tab of the Data Log Models editor, you specify which tags will bescanned for data for the data log model. Log models can contain up to 10,000 tags.For more information, see Help.13-6