Configuring Displayed Engineering Units for a Tag

For each analog tag in a trend, you can configure the chart to display the data in units different from the tag's base unit.

Note: This feature must be licensed and correctly configured before you can change display units. Refer to the AVEVA Historian Administration Guide for more information on configuring engineering units, and the engineering units catalog.

To configure display units for an analog trend tag

1. In the Tag List pane, locate and select the tag which you want displayed in different units.

   The Display Units column indicates the units used to chart the tag data, while the Original Units column indicates the tag's configured units.

   

2. Clicking in the Display Units column for the selected tag displays a list of all the tag's related units. This list is composed of all the engineering units assigned to the same dimension as the original units, based on their association via the engineering units catalog.

   

3. Select an engineering unit from the list. The chart is refreshed and the tag data is displayed in the selected unit.

   Note: You may need to scale the tag after conversion if the data displays outside the current chart boundaries.