Utrn Transactions - Secure Liberty 100 Technical Reference Manual

Configurable time-based debt deduction rules are summarised in the following table:
Deduction type Meter account in
credit zone
Debt Deduction allowed
Debt Deduction allowed
Standing charge Deduction allowed
Standing charge Deduction allowed

5.6 UTRN Transactions

A Unique Transaction Reference Number (UTRN) is an encrypted code used for changing a meter's account,
changing the meter's switch state or changing the meter's configuration. There are five (5) types of UTRNs:
a) Vend UTRN: used for adding, deducting, or setting the meter's account to an absolute value either
locally or remotely with immediate effect; a vend UTRN will have information such as the date and time
of the transaction, transaction source, amount and currency code.
The meter can hold a maximum credit balance of up to the limit defined in the Prepayment configuration
which must not exceed £21,474.00; if a vend amount is sent to the meter either locally or remotely
causing the meter's account to exceed its maximum credit limit then the meter will reject the vend.
b) Supply connection UTRN: used for disconnecting the supply or changing the switch state to 'READY'; a
supply UTRN contains information such as the date and time of the transaction, transaction source,
activation time and intended supply state.
c) Engineering service UTRN: used for the following services in the meter with immediate effect:
o
switching the meter operating mode to Default mode
o enable or disable the local optical port
o enable or disable HAN joining
o leave the HAN
o clear event logs
o clear Site ID and Payment Card ID
o clear load profile data and snapshot data
An engineering service UTRN will have the date and time of the transaction, transaction source and the
type of service performed.
d) Vend + additional Tariff UTRN: used for sending a tariff with an account vend and will have information
similar to that of a Vend UTRN. This UTRN type is also accepted by meters in Credit mode in order to
change the meter's operating mode from Credit to Prepay. At manufacture the meter is configured to
always maintain one set of prepayment limits and a Friendly Credit calendar which will be applied at the
time of mode change from Credit to Prepay via a UTRN. The following information can be updated
using the UTRN:
BGX501-767-R02
EC in use
Deduction allowed
Deduction not
allowed
Deduction allowed
Deduction not
allowed
Liberty 100 Smart Electricity Meter Technical Reference Manual
Supply disabled
Stored in debt
register
Deduction not
allowed
Stored in debt
register
Deduction not
allowed
EC expired in FC
zone (i.e. the meter
account is zero or
negative)
Stored in debt register
Stored in debt register
Stored in debt register
Stored in debt register
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