Rockwell Automation Energy Management Accelerator Toolkit Quick Start - Manual (Page 425)

Rockwell Automation Publication IASIMP-QS016C-EN-P - October 2014 425
Appendix
B
Custom Units and Value Types
This appendix shows how to configure custom base units, units, and value types used by meter tags for logging energy data.
The FactoryTalk EnergyMetrix software collection of base units are those most commonly used in energy management
applications. A base unit consists of a unit and a scaling factor. For example, VA (voltampere) is a base unit, and kVA
(kilovoltampere) is a unit, with a scaling factor of 0.001.
Value types are used by reporting and billing functions to aggregate values of a specific type in one or more meters or
groups. The FactoryTalk EnergyMetrix software value types represent the most commonly used electrical energy
management parameters. Value types are set up as consumption or demand. Consumption types are treated as accumulated
values of energy or process output, for example, real energy net. Demand types are treated as rate values such as real power
demand.
If FactoryTalk EnergyMetrix software does not contain the base units, units, and value types required, you’ll need to create
them.
Verify Base Units
1. Select Unit Setup on the System tab.
2. Click the Base Units tab.
3. Click the Base unit pull-down menu to show
the available units.
4. Verify that all base units required are available
in the list.
You’ll need to create those base units that don’t appear in the FactoryTalk EnergyMetrix list. For the Efficient Industries
Plant 1 example, create these base units:
• gallons (gal) for fuel oil, propane, and water
• therms (thm) for natural gas
• pounds (lbs) for steam
• cubic feet (cf ) for air
TIP For advanced users, an SQL query named Accel Tk Units Value Units.sql is available that will automatically populate the
database with value types and units. This query is in the System Layout and Wiring folder of the Energy Management
Accelerator Toolkit CD image.