Secure Liberty 100 Technical Reference Manual page 27

The snapshot data consists of the following information as per its configuration:
● Basic information consisting of the snapshot time, last billing snapshot time, the cause of snapshot and
site ID.
● Device information consisting of the supplier ID, meter serial number, meter firmware name, commodity
type and the meter type.
● Current tariff information consisting of the tariff type, tariff ID, tariff label and the meter mode.
● Cumulative energy register values for active import, reactive import, active export and reactive export.
● Time of use (TOU) energy rate register values based on the tariff type and charging scheme.
● Maximum demand values for active import and active export energy along with its time of occurrence.
● Prepayment and Credit mode information consisting of currency code,- meter account balance, total
vend added to date, cost of consumption and standing charges since last billing, and outstanding debt
at the time of snapshot.
● TOU energy rate register advance values based on the tariff type and charging scheme of the current
active tariff.
● New tariff information (i.e. tariff type, tariff ID, tariff label and the meter mode) which is available when
the current tariff or price have been changed.
● Debt account information (i.e. accumulated debt register values and outstanding debt types).
All snapshots have a date and time stamp, snapshot reason and the last billing date and time. Snapshot data is
available for all configured energy types.
5.2.4.1 Midnight Snapshot
Liberty 100 takes a daily snapshot of the energy registers at every midnight and stores the data for the last
fourteen (14) days. The meter does not record midnight snapshots for any complete days when power was off
for the complete day. The snapshot data is updated daily on FIFO basis.
Note: The stored data can be sent remotely to the HES.
5.2.4.2 Billing Snapshot
The meter will take a snapshot of its energy registers for billing purpose for any of the following actions:
● Change of tariff
● Price change
● Scheduled billing date
● On-demand billing
● Change of meter operating mode
● Occurrence of an abnormal event, for example, corruption of energy register
● Change of Supplier
● Change of Tenancy
The meter stores a total of 13 billing snapshots. Billing snapshot data is updated on a FIFO basis.
On change of tariff and meter operating mode, a billing snapshot is performed before the event.
a) Change of tariff – the meter takes a billing snapshot before activation of a new tariff configuration.
Change of tariff comprises the following:
• Change of tariff scheme
• Tariff type
• TOU seasonal calendar and
• Block reset duration
BGX501-767-R02 Liberty 100 Smart Electricity Meter Technical Reference Manual Page 27 of 116