The 15-minute film in your meter's memory: retrieving it, reading it, making it useful.
Electronic meters record not just cumulative registers but how consumption is distributed over time: this time series, typically kept in 15-minute periods, is the load profile. In the IEC 62056-21 world the primary profile is called P.01; some meters carry a second channel as P.02.
The profile reaches as far back as the meter's memory allows — typically a few months. Each record holds the period's average power (or energy increment) and a status word.
The profile is requested in programming mode with the R5 command and a time-range parameter: the P.01(ZSTs13;ZSTs13) pattern carries start and end times, and the meter dumps records in blocks.
A typical header line looks like P.01(1250801000000)(00000000)(15)(2)(1.5)(kW)... — start time, status word, period in minutes, channel count, channel OBIS code and unit, followed by one line of values per period. The status word flags events such as power failures and clock adjustments.
Demand analysis: contract-power violations and the exact hour of peak load are read straight from the profile. Fraud and anomaly detection: inconsistency between register growth and profile totals is the classic trace of tampering.
In billing disputes the profile is the evidence of when consumption actually happened. In transformer and feeder planning, profiles of meters on the same line are stacked to derive true coincident load.
In our Windows and Android apps, pick the date range and pull P.01 in one click; the app decodes status words, charts the series and exports to Excel/PDF. For long profiles we recommend uninterrupted transfer over MO-USB or MO-WIFI; on battery models, do not interrupt while RDY is lit.