Rockwell Automation 9307 FactoryTalk EnergyMetrix - Manual (Page 198)

FactoryTalk EnergyMetrix Software
198
How to use X-Y Charting and Targeting
The X-Y Trend Chart provides graphical tools to help you analyze energy usage and
identify areas for reducing cost.
Overview of X-Y Trend, Targeting, and CUSUM Analysis
The X-Y chart plots one dependent (Y) variable against up to 3 independent (X) variables.
It performs statistical analysis methods including linear regression, targeting, and
CUSUM (cumulative sum) analysis.
Calculation Interval
The calculation interval specifies the time span each point on the X-Y chart represents.
Data for each point is aggregated depending upon the meter tag and value type of the
selected X and Y variables. For Consumption type value types, each point represents the
total usage during the time span (regardless of whether the Log Delta Reading attribute is
set or not). For other value types, each point represents the average of the values during
the time span. You can select among three intervals:
 All data - each point represents a single logged value, or one logging interval
 Day - each point represents a summary of one day's logged values
 Week - each point represents a weekly summary
The X-Y trend chart is included in the ChartsPlus option.