Cewe Prometer 100, Руководство пользователя

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Page 48 of 72 Prometer 100 User Manual BGX501-943-R01
7.10 Historical registers
Historical registers are used by the Prometer 100 to store current register values at defined points so as to be
able to read them later. Stored in historical registers are all maximum demand values, TOU registers and
energy registers, with the exception of energy registers by phase. The historical registers are time stamped to
indicate when storage occurred. The Prometer 100 can store up to 15 historical registers.
Date and time
Energy registers
Maximum demand
values
Time of use registers
7.10.1.1 Finish historical period
By finishing a historical period, the current registers values are stored in historical registers and the maximum
demand values are reset. When a period is finished, an event is stored in the meter’s event log. Periods can be
finished in various ways:
•
Via meter push button
The period is finished when the meter’s MD Reset button is
pressed.
This requires that the historical registers are configured to permit
finish via the meter button.
•
Via M-Cubed
The period is finished when a command is given from M-Cubed or
third-party software.
•
At any configured billing
date
The period is finished when the meter clock reaches the
configured billing date
•
Via digital input
The period ends when a pulse is received at a digital input on the
meter.
This requires both that the historical registers are configured to
permit ending via a digital input and that an input is configured for
this purpose.
7.10.1.2 Lock out time for finish historical period
The Lock out time prevents the user to create a new historical period within a configured time. It can be
configured from 1 hour to 40 days.
7.11 Time of use
Time of use is a function that enables energy to be divided up into various registers depending on the rate that
applied when the energy was measured. In the Prometer 100, tariff structure can be stored that switch rates at
predetermined times according to a configurable pattern. A tariff structure consists of seasons, day types and
holiday dates. The maximum number of rates is eight.
•
Day types specify how rates change during a 24-hour day.
•
Seasons specify the day types that apply during the days of the week, Monday to Sunday.
•
Holiday dates specify the day type that applies on a certain date.
•
Rate input can be used to control active rate depending on the state of digital input signals.