Rockwell Automation 9307 FactoryTalk EnergyMetrix - Manual (Page 96)

FactoryTalk EnergyMetrix Software
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Meter Tag Common Elements
Whether a meter tag represents a power monitor parameter, a PLC data table address, an
FactoryTalk EnergyMetrix server roll-up parameter, a manual data entry point, or an OPC
item, meter tags share several common elements. Not all tag types use every element.
Meter Tag Type
Select from None, Device, Manual, Derived, or Alarm. When you select a tag type, the
meter tag setup page will change to suit the tag type.
Meter Tag Name
The name cannot contain the following characters: . (period), # (pound), or ‘ (single
quote).
Value Type
This field is automatically populated for power monitor, EEM and roll-up tags. For other
tags, select a value type if desired from the pull-down menu.
Value types are used by the reporting and billing functions to aggregate values of a
specific type in one or more meters or groups. The default collection of value types in
FactoryTalk EnergyMetrix software represents the most commonly used electrical energy
management parameters. Value types can be set up as Consumption or Demand.
Consumption value types are treated as accumulated values of energy or process output,
for example, real energy net. Demand value types are treated as ‘rate’ values such as real
power demand.
The Unit Setup page permits you to add or edit value types.
Log Rate
The time expressed in minutes between subsequent data logging activity for the meter tag.
Number of Demand Periods
This parameter is used with power monitor and EEM tags and must be the equivalent to
the number of demand periods averaged together configured in the source device.
Address and Tag Format
These fields are automatically populated for power monitor device tags and partially
populated for 1803-EEM device tags. For other tag types, you must enter the appropriate
address and data type. For derived tags, you can select a data type or leave it blank.
The time that FactoryTalk EnergyMetrix software takes to log data during each
polling interval is dependent on the number of devices, meters, and tags set up in
FactoryTalk EnergyMetrix software; the performance of the local area network; and
the characteristics of the server hardware, for example, number of processors,
clock rate, and amount of RAM. Setting a Logging Rate faster than the system can
complete each polling interval may result in lost data and poor system
performance.