Rockwell Automation 1408-EMxx PowerMonitor 1000 Unit - Manual (Page 42)

42 Rockwell Automation Publication 1408-UM001D-EN-P - September 2013
Chapter 2 PowerMonitor 1000 Unit Features
Related Functions
• Demand metering
Time of Use Logs
The power monitor maintains records of energy and demand organized by times
of use you define. These records may be used for billing and cost allocation by
RSPowerPlus software.
There are up to three time-of-use (TOU) logs, one for real energy and demand,
one for reactive energy and demand, and one for apparent energy and demand.
Within each log, energy consumption and peak demand are recorded into off-
peak, mid-peak, and on-peak categories. The days and times that define the mid-
and on-peak periods are user selectable. All times of use not defined as mid- or on-
peak are considered off-peak.
This function applies to catalog numbers 1408-EM1 (one TOU log, real energy
only), 1408-EM2 (three TOU logs, energy, and demand), and 1408-EM3 (three
TOU logs, energy, and demand).
Logged Parameters
Each TOU log consists of 13 records, an in-process record for the current month,
and one record each for the previous 12 months. The monthly records operate in
a circular or FIFO fashion. On a user-selected day each month, the current record
is pushed into the monthly record stack and cleared. Each record contains the
following data:
• Net energy: off-peek, mid-peek, and on-peak
• Peak demand: off-peek, mid-peek, and on-peak
• Start and end date/time of the record
• Record number
Results
Time of use log records can be accessed only via communication.
Commands
• Store and clear current TOU Record
• Clear TOU Log
Related Functions
• Energy metering
• Demand metering