Manual

62 Rockwell Automation Publication 1426-UM001F-EN-P - November 2013
Chapter 4 Metering
Commands
The following commands are supported by the power monitor:
• Set GWh/kWh register
• Set GVARh/kVARh register
• Set GVAh/kVAh register
• Clear all energy registers
Related Functions
• KYZ output
• Energy log
• Configuration lock
Demand Metering
Demand is an electric power term that expresses the average energy usage over a
predefined period of time. The power monitor can be configured to measure
demand by using a fixed demand period or a sliding window. The demand period
can be timed internally, synchronized to an external demand end-of-interval
contact connected to the S2 status input, or synchronized by using
communication. The PowerMonitor 5000 unit, by default, calculates demand on
a fixed 15-minute demand period, synchronized to the power monitor internal
clock.
Projected demand calculates an instantaneous or linear projection of demand at
the end of a demand interval.
Table 9 - Demand Metering Metered Parameters
Parameter Description Range Units
kW_Demand The average total real power during the
last demand period.
± 0.000…9,999,999 kW
kVAR_Demand The average total reactive power during
the last demand period.
±0.000…9,999,999 kVAR
kVA_Demand The average total apparent power during
the last demand period.
0.000…9,999,999 kVA
Demand_PF The average PF during the last demand
period.
-100.0…100.0 PF
Demand_Amperes The average demand for amperes during
the last demand period.
0.000…9,999,999 A
Projected_kW_Demand The projected total real power for the
current demand period.
± 0.000…9,999,999 kW
Projected_kVAR_Demand The projected total reactive power for the
current demand period.
±0.000…9,999,999 kVAR
Projected_kVA_Demand The projected total apparent power for the
current demand period.
0.000…9,999,999 kVA
Projected_Ampere_Demand The projected average amperes for the
current demand period.
0.000…9,999,999 A