====Count Example: Calculate Per-Shift Energy Use====

In this example, we want to know how much power our different shifts and crews are using.

Our power meters have a simple 'kWh' output that we can use.

===Available Information===

^Asset^Property^Desc^
|Incomer Meter|Power Usage|A measured amount of power usage.|

===Initial Layout===

{{start_counter.png}}

To begin with, we have one [[counter_pivot|Pivot]] node named //Pivot On//, and one [[counter_totaliser|Total Output]] node named //Total//

The output node is fed from an [[ardi_point|ARDI Point]] (a point of data from the field), while the pivot is driven from a [[timing_diff|Time Difference]] node.

===Step 1: Choose the Pivot===

Our first step is to choose //what we are going to pivot on//.

In this case, we want the totals per **shift** or per **crew**. We can do this by pivoting on the name of the current Event.

  * Right-click on the Time Difference node and choose 'Remove'
  * Right-click in empty space, choose 'Add', 'ARDI' and 'Event Name'
  * Enter the name of the Event Source - in this case, 'Shift Schedule'.
  * Drag the lower output from the Event Name node into the Pivot node.
  * Right-click the Pivot node, choose 'Title' and type 'Shift'

===Step 2: Change the Node Type===

The default counter graph includes the **Total** node, which works if we already have some sort of count data.

In this case, we want to convert a //rate// to a //total//. So we want to replace the Total node with a [[counter_rate|Rate]] node.

  * Right-click on the Total node and choose 'Remove'
  * Right-click in empty space, choose 'Add', 'Count' and 'Rate'
  * Make sure the time multiplier is set to 3600 (one hour in seconds)
  * Right-click the new node, choose 'Title' and type 'Power Usage'

===Step 3: Choose the Data to Count===

Next, we need to choose //the data we want to totalise//.

We can use the existing ARDI Point.

  * Click on the ARDI Point and change the name to 'Incomer Meter.Power Usage'

{{counter_meters_complete.png}}

//NOTE: The above example is actually calculating **total meters travelled per day**, but the logic is identical.//

===Analytic Complete===

And you're done - by pressing **Save and Visualise**, you'll have a simple analytic showing the total amount of energy consumption for each shift and crew.

{{pivot_mode_display.png}}