Rockwell Automation FactoryTalk View Machine Edition Users Guide - Manual (Page 539)

28-1
28
Set up trends
This chapter describes:
 What trends are.
 Summary of steps for creating a trend graphic object.
 Create trends, and the Trend Object Properties dialog box.
 The parts of the trend graphic object.
 The different chart types.
 Choose colors, fonts, lines, and markers for the trend.
 Test the trend.
 Use objects from the Trends graphic library.
 Use buttons to control the trend at run time.
 Print trend data.
 Run-time errors for trends.
About trends
A trend is a visual representation of current or historical tag values. The trend provides
operators with a way of tracking plant activity as it is happening.
You can:
 Plot data for as many as eight tags or expressions on one trend.
 Create a trend that is part of a graphic display or acts as the entire graphic display.
 Plot data over time, or plot one variable against another in an XY Plot chart to show
the relationship between them.
 Show isolated or non-isolated graphs. Isolated graphing places each pen in a separate
band of the chart. With non-isolated graphing, pen values can overlap.
 Create buttons to allow the operator to pause, scroll, and print the trend data.
The illustration below shows a trend that has been added to a graphic display. You can
view the following display by opening the InstantFizz_ME sample application.