Meter Configuration And Functionality - Secure Liberty 100 Technical Reference Manual

Scheduling of the meter mode change for a future date will not disturb the current settings in the meter until the
specified date and time is reached. If power is off during the scheduled date and time, the switchover will occur
when power is restored.
The meter performs the following activities when it receives a command to switch from Credit to Prepayment
mode or Prepayment to Credit mode:
● Performs a billing snapshot at the time of mode switching.
● Changes the meter operating mode and sends the information to the HES or, if the mode switching
command is for a future date sends an acknowledgement on receipt of the command. However, if the
received command is recognised as invalid or the meter is unable to implement the mode switching
command then it will reject it and record the reason for rejection and if configured to do so, will notify the
HES.
● During mode switching process from Credit to Prepayment the meter will not interrupt the user's supply.
If the meter account has no credit during this switching process then as part of configuration, the retailer
can either add a credit amount or immediately activate the Emergency Credit in the meter.
● When the meter is operating in Credit or Prepayment mode and the supply is disabled due to account
expiry, switching its operating mode will change the meter's switch to 'READY' state. A meter with
'READY' switch state will restore the supply by user interaction at the meter or IHD. A command to
change the meter to Prepayment will initiate the following: activate Emergency Credit on change or add
a credit amount to the account to ensure the user is not disconnected; set Emergency Credit settings;
set Friendly Credit; set date and time for mode switching.
● When a meter in Prepayment mode receives the command to switch to credit mode, it resets all the
Prepayment account balances, outstanding debts and settings after changing the mode.

5.8 Meter Configuration and Functionality

The meter verifies and authenticates the commands it receives over WAN before executing them. If
authentication fails, the meter will reject the command. The meter sends acknowledgement on receiving
configuration commands having schedules and actions to be performed on a future date and will execute the
command on the intended date and if configured will send event notification to HES. These future dated
commands can be cancelled or overwritten by a new command.
The following parameters are configurable in Liberty 100 meters via authenticated commands:
● Tariff type
● Tariff rates and tiers
● Price
● Block reset for block tariffs
● DST
● Prepayment settings – Low Credit, Emergency Credit threshold, cut-off value, Emergency Credit limit
● Non-interrupt periods (Friendly Credit calendar) and vulnerable Users (supply interrupt is permanently
disabled).
● Mode of operation
● Site ID
● Supplier information
● Maximum possible credit balance
● Prepayment PAN (Payment Card ID)
● Billing period
● Standing charge (daily)
● Password configuration
BGX501-767-R02 Liberty 100 Smart Electricity Meter Technical Reference Manual Page 37 of 116