You can add extra data fields to each point in the database (except pulse points). The data fields can contain any information that you require and are added to the CDBPoint table (see Class Information in the ClearSCADA Guide to the Database). For example, you may need to store a Boolean value that indicates whether a point was modified successfully by an external program.
To add an extra point data field, you need to add a Standard type of extra field and then configure it to have Data as its Section setting. If you want it to be hidden from view, you will need to clear the Show on Form setting for the field. For more information, see Create or Modify an Extra Field.
Example:
An external application is used to export the values of a point to another system. The program needs to write a time value to the point so that it can determine the times at which previous exports have taken place. When the next export occurs, the data that was reported between the last export time and the current time will be exported.
The Extra Point Data Fields feature is used to create an ExportTime field. The program will write the time of the latest export to the ExportTime field.
NOTE: Point Data fields are not shown as columns on Queries Lists and cannot be included in filters.