Use the Resolution tab

Use the Resolution tab to specify the "granularity" of the data to be returned.

To configure the resolution:

1. If cyclic retrieval is used for the calculation you selected, configure the following options in the Cyclic area.

   • XX values over equal time intervals: The number of rows to be returned for a specified time period. For cyclic retrieval, the rows are spaced evenly across the time period, and the default row count is 100 rows. For cyclic retrieval, the row count is applied for each tag in a query.

   • Values spaced every XX ms: The sampling rate, in milliseconds, for retrieving the data in cyclic mode.

   • Full: All records between the start and end dates are returned. This option is only available for cyclically-stored tags.

   • Interpolate: Linear interpolation is used between stored values. Interpolation only applies for values of cyclically-stored analog tags where no criteria has been specified. Also, the resolution must be set to return all values or to return values spaced according to a time interval.

2. If delta retrieval is used for the calculation you selected, configure the following options in the Delta area.

   • All rows: Return all rows in the record set.

   • First XX rows: The total number of consecutive rows to be returned, starting from the first row in the record set.

   • Value deadband: The percentage of full scale (range), in engineering units. Any value changes that are less than this percentage are not returned. Applies only to delta retrieval.

   • Time deadband: The minimum time, in milliseconds, between returned values for a single tag. Applies only to delta retrieval.