Tou Schedules; Season Changes; Power Failure And Restoration; Ilc2 Option Board Configuration - Elster A3 ALPHA Product Manual

June 2008
At midnight, the ILC2 option board copies the A3 ALPHA meter's billing data to
a separate memory location. A demand reset is then performed immediately
thereafter. During the next reading of all its registered meters, the collector
retrieves and stores the copy of the billing data. Once the billing data is stored in
the collector, it can be retrieved by MAS at the next read of the collector.
This feature allows individual meters to be identified to a specific billing date that
conforms to the consumer's request or the utility's business process. Neighbor-
ing meters can have individual billing dates and are not forced to be read on the
same day. Changes to the billing date are handled through a schedule change in
MAS.

TOU Schedules

The A3 ALPHA meter can be programmed using Metercat to operate on a TOU
program. Each program includes a TOU schedule and display list. Each TOU
schedule for the A3 ALPHA meter consists of weekday, weekend, and two spe-
cial day types (that is, holidays). The display list controls the values that are
shown on the A3 ALPHA meter LCD. See the A3 ALPHA Meter Technical Man-
ual (TM42-2190) for information on the values that can be displayed on the
A3 ALPHA meter LCD.

Season Changes

Season changes for the A3 ALPHA meter are controlled by the calendar in the
A3 ALPHA meter.

Power Failure and Restoration

When there is a power failure, the A3 ALPHA meter initiates a shutdown and
stores the A3 ALPHA meter billing data and status information in EEPROM. All
information stored in the ILC2 option board is stored in battery-backed RAM.
The A3 ALPHA meter's real-time clock and the data stored in the ILC2 option
board are maintained by the super capacitor and battery in the A3 ALPHA meter
during a power failure. If both the super capacitor and battery fail, all RAM in the
meter and in the ILC2 will be lost.
Upon subsequent power restoration, an error code is generated for both the
A3 ALPHA meter and the ILC2 option board.
■ For information on A3 ALPHA meter error codes, see the A3 ALPHA
Meter Technical Manual (TM42-2190).
For information on ILC2 option board error codes, see "ILC2 Option
■
Board Error Codes" on page 7.

ILC2 Option Board Configuration

At the time of ordering, the node can be configured to report register data in one
of two ways:

short data format

■
long data format
■
Short data format. The short data format returns the first kWh consumption
data configured in the meter, three current maximum demand quantities, identi-
fication for 1 channel of load profiling, and 1 channel of load profiling to the col-
lector.
The first demand quantity can be assigned to the maximum demand of
■
any of the four tiers or can be assigned to the total demand.
A3 ALPHA Meter/Node (ILC2)
Product Guide
DRAFT
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