Add or edit a dimension

To add or edit a dimension:

1. In the Operations Control Management Console, expand a server group, and then expand a server.

2. Expand Configuration Editor, expand System Configuration, and then expand Tag Configuration.

3. Right-click Engineering Units Catalog, and then select Unit Dimensions and Systems.... The Canonical Unit Dimension and System dialog displays.

   

4. Select New Dimension... to create a new dimension, or double-click the name of a dimension in the Dimensions column to edit it. The dimension properties dialog displays.

   

5. If you are creating a new dimension, enter a name in the Dimension field. If you are editing an existing dimension, you cannot change the name and this field is read-only.

6. If the dimension has a corresponding integral or derivative dimension, select the Time Integral dimension and/or Time Derivative dimension from the list. Otherwise, choose N/A. The time integral dimension is appropriate for converting a dimension that measures a rate, while the time derivative is appropriate for converting a dimension that measures a quantity.

   For example, the "Length" dimension's time derivative is speed.

   

   Likewise, the "Speed" dimension's time integral is length.

   

   Note: Time integrals and time derivatives can be used in "integral" or "rate of change" queries to request data in alternate units. For example, a "meters/second" tag can be used to query the distance traveled over a period of time.

7. Select OK when you are done editing.