Publication 1404-UM001D-EN-E - October 2004
7-18 Data Logging
• Peak AM – selects morning peak time-of-use hours. Default 2048
(800 Hex, 11:00 to 11:59 a.m.)
• Peak PM – selects afternoon peak time-of-use hours. Default 7 (7
Hex, 12:00 noon to 2:59 p.m.)
Reading Time-of-Use Log Data
The Powermonitor 3000 stores the TOU log in three sets of 13 records
each, one set for real energy and demand, a second for reactive
energy and demand, and the last for apparent energy and demand.
For each set, record 0 contains the in-process records for the current
month. Records are stored to non-volatile memory every 2 minutes.
Records 1 to 12 contain the monthly records for the previous 12
months. When the log day occurs, the records are shifted down, with
the record 0 moving into record 1 and the oldest record being deleted.
Tables A.56 contains the real energy and demand time-of-use data
from the record selected during the most recent write to Table A-55.
This read-only table of 12 floating-point elements contains the
following data:
• Off-peak MWh
• Off-peak kWh
• Off-peak demand Watts
• Mid-peak MWh
• Mid-peak kWh
• Mid-peak demand Watts
• Peak MWh
• Peak kWh
• Peak demand Watts
• Start date in YY/MM/DD format
• End date in YY/MM/DD format
• Record number 0 thru 12
Tables A.57 and A.58 are identical except that Table A.57 contains
reactive energy and demand TOU data and Table A.58 contains
apparent energy and demand TOU data.
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