Rockwell Automation 9307 FactoryTalk EnergyMetrix - Manual (Page 72)

FactoryTalk EnergyMetrix Software
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Set up a Meter
A meter is a logical source of data to FactoryTalk EnergyMetrix software and is the unit
used for licensing FactoryTalk EnergyMetrix Manager software. There are two types of
meters.
 Device Meters are data sources that are associated with Devices. Tags associated with
Device Meters are generally polled automatically
 Manual Meters are data sources that permit data to be entered manually. A Manual
Meter may also be used as a ‘virtual’ meter with derived tags
Meters are assigned to Groups and Domains and may be apportioned among more than
one Group or Domain.
Meter Types
Meters can be assigned meter types. You can add meter types only by adding rows to the
dbo.MeterTypes table in the FactoryTalk EnergyMetrix EMMA database. Meter types are
a useful index for filtering meters in MPR scripts. Manual meters can be assigned any
Meter Type so long as its meter tags are set up as manual meter tags.
Meter Tags
Meters can be considered collections of Meter tags. A tag is the basic unit of data
collection in FactoryTalk EnergyMetrix software. A tag can be a Device tag, a Manual tag,
a Derived tag, or an Alarm tag.
 Device tags are associated with data values polled from a Device. You can set up
Device tags to be polled in real time or to be polled from the device's trend (or
snapshot) log by using automatic data repopulation (ADR).
 Manual tags are placeholders in the database that allow a user to manually input
values that are used in reports but are not available as device tags.
 Derived tags are the result of calculations performed on combinations of other meter
tags.
Most meter tags are associated with a Value type. The value type is used by the billing and
reporting functions to aggregate data of a certain type from one or more meters or groups.
FactoryTalk EnergyMetrix software includes a number of default Value types. You can
add custom Value types from the Unit Setup screen in the System tab.
You must set up at least one Group or Domain before you can set up Devices and
Meters. You must set up Devices before you set up device-based Meters.