Rockwell Automation FactoryTalk View Site Edition Users Guide - Manual (Page 605)

23 • S ETTING UP TRENDS
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Pen icons
Pen icons, if specified, are shown at the right edge of the trend chart.
At run time, if a pen’s current value is within the scale shown on the vertical axis, the
pen’s icon is shown.
The position of the icon indicates the pen’s most recently recorded value, even if the trend
is paused, or if the most recent value has not yet been plotted.
Pen markers
As shown in the next illustration, pen markers are symbols that indicate data points. A
data point is the exact position of a value plotted on a trend chart.
You can use pen markers to show when data is sampled. For example, when the trend is
updated as the value changes, the pen marker indicates when the trend is updated.
You can also use pen markers to read pen values at run time.
If data is plotted frequently, the markers might not show as distinct, separate symbols on the
trend chart.
A ‘boxed’ pen
marker
An ‘Up triangle’ pen
marker