Rockwell-automation FactoryTalk View Site Edition Users Guide Manual do Utilizador descarregar pdf (Página 613)

23 • SETTING UP TRENDS

23 • Placeholder

The trend in the following illustration uses shading to indicate tag values in alarm. The

difference between the tag’s value and the tag’s alarm level is shaded.

Example 1: Shading with three pens

The upper pen, Pen 2, has a constant value of 75 and the lower pen, Pen 3, has a constant

value of 25.

Pen 1 represents the tag called VIN_LEVEL. The trend is shaded whenever Pen 1 goes

above Pen 2 or below Pen 3. A plot for this trend looks like this:

Shading between pen

Upper-bound pen

Lower-bound pen

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Rockwell-automation FactoryTalk View Site Edition Users Guide Manual do Utilizador Página 613