Change Of Tenancy (Cot); Meter Switch State - Secure Liberty 100 Technical Reference Manual

5.14

Change of Tenancy (COT)

On receipt of a COT request any delayed COT request will be cancelled and the meter will perform one or more
of the following actions, depending on the configuration:
● Performs a billing action before and after change of tenancy.
● Takes a billing snapshot before and after change of tenancy; if the meter is operating in Credit mode
then the meter balance is also reset.
● Resets Credit and Debt registers (in Prepayment mode the Credit register will automatically start using
EC allowance, if available).
● Resets tariff to its Default mode value.
● Clears snapshot registers, historical load profile information, payment card ID, UTRN log, prepayment
log, account log, hardware log, configuration log, supply quality log, operating condition log, supply log
and tamper log.
● Changes the meter's switch state to 'Off' or 'READY' state.
After COT activation the meter logs an event, together with the date and time of COT activation, and then
makes the following information available for display:
● Load profile data from the SIP of effective COT time.
● Daily and weekly energy consumption data from the effective COT date.
● Monthly consumption data not more than 45 days from the effective COT date.
● Up to five accepted historical vend UTRNs from the effective COT date.
In the case of change of tenancy the following three situations may occur:
1. The tenant has left the premise without notification,
2. The tenant notifies that he is leaving the premise immediately, or
3. The tenant notifies that he will leave the premise on a future date.
For the three cases listed above the actions taken at the meter on receiving a COT request are:
Case 1: On receipt of the above information from the new tenant, the supplier sends a COT request to the meter
immediately. On receipt of this request the meter performs all the actions listed above immediately and stores
the following information related to the new tenant that will be made available on the meter display and on the
IHD:
• The last 5 accepted vend UTRN history
• Daily, weekly and monthly kWh consumption, as well as cost of consumption figures
• Load profile data
Case 2: On receipt of the above information, the supplier sends a COT request to the meter immediately. On
receipt of this request the meter performs all the actions listed above immediately.
Case 3: On receipt of the above information, the supplier sends a delayed COT request to the meter which will
be performed on the day the tenant leaves the premise. On receipt of this request the meter will schedule all the
actions listed above to be performed on the specified date.
5.15

Meter Switch State

The meters switch has three states – On, Off and READY and is driven to these states by the following events:
BGX501-767-R02 Liberty 100 Smart Electricity Meter Technical Reference Manual Page 43 of 116