Use the Criteria tab

Use the Criteria tab to specify the filtering criteria for the data value(s) to be returned.

To configure value criteria

1. To configure criteria for a discrete tag, select the first Value check box and set the criteria to be either a 1 or 0. Go to Step 4.

2. To configure criteria for an analog tag:

   1. Select the first Value check box and set the criteria for the data value. For example, the value must be greater than ( > ) 1500.

   2. (Optional) Select the second Value check box and set another criteria for the data value. For example, the value must be less than ( < ) 2000.

   3. Go to Step 4.

3. (Optional) Select the Value not null check box to filter out NULL values from the results.

4. (Optional) In the Quality list, click the quality criteria for the data. Only data values that match the quality you specify (Good, Bad, Doubtful) are returned.

5. (Optional) In the Criteria applicability list, select the moment at which the edge detection criteria is met.

   • first true: Returns only rows that are the first to successfully meet the criteria (return true) after a row did not successfully meet the criteria (returned false). This is also known as “leading” edge detection.

   • no longer true: Returns only rows that are the first to fail the criteria (return false) after a row successfully met the criteria (returned true). This is also known as “trailing” edge detection.

   • true: Returns all rows that successfully meet the criteria; no edge detection is implemented at the specified resolution.

   • first true or no longer true: All rows satisfying both the leading and trailing conditions are returned.