Add Credit; Credit Top Up - Wan / Han - Honeywell AS302P Operating Instructions Manual

Single phase smart meter
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17.4. Add Credit

Credit can be added to the meter in the following ways:
From DCC via the WAN/HAN, known as a PTUT (Payment Top-up Transaction)
By the Customer entering a UTRN using the Pushbuttons on the meter User Interface
By the Customer entering a UTRN using a PPMID connected to the HAN
A UTRN (Unique Transactional Reference Number), is a 20 Digit Code unique to a particular Smart Meter.
When the PTUT or UTRN is received by the meter it will perform the following checks:
1.
Compare the Credit Value with the Maximum Credit Threshold, if the Credit Value is largest then the UTRN will
be rejected
2.
Compare the projected new Meter Balance with the Maximum Meter Balance Threshold, if the new Balance is
largest then the UTRN will be rejected
3.
Verify the Authenticity of the UTRN
4.
Verify it is intended for this meter
5.
Generate a PTUT Counter and compare this against the last 100 verified PTUT entries and reject any duplicate
presentation of verified UTRN's and PTUTs
6.
Count the number of Invalid Number of UTRN's Entered and Processed
If the PTUT or UTRN is rejected for reasons 1, 2, 3, 4, 5 above then the meter will generate an entry in the Security Log.
The new Meter Balance will be updated once any appropriate reductions are made (See Section – Allocation for Credit
Top Up), if the Meter Balance rises above the Disablement Threshold then the Contactor will be Armed (the contactor
symbol will flash). An Alert will be sent on the HAN Interface, indicating the Contactor is Armed.
On successful application of an Addition of Credit, the Billing Data Log will be updated and an Alert containing a UTC Date
and Time stamped Meter Balance value will be sent via the HAN.
The last 10 Top Ups can be viewed on the display.
Top Up Information is shown on the display:
Top Up Amount (£0.00)
Top Up Date and Time (dd-mm-yy hh:mm)
If incorrect UTRN attempts are made from the PPMID or the User interface then:
A count of the incorrect UTRN attempts is incremented
If this count equals 10 then
-
further attempts are locked out for a 30 minute period
-
an Event is raised
If a remote UTRN is received then this will be validated regardless of the state of the lock-out. If this UTRN is also invalid
then the counter will be incremented.
On receipt of a valid UTRN the Lock-out Counter will be reset to zero.
The meter completes all SMETS / GBCS requirements to ensure only valid UTRNs / PTUTs are accepted and processed.
It is also recommended that the Supplier reads the meter to ensure that the UTRNs /PTUTPs accepted by the meter are
aligned with the Financial Transactions seen through the Backend Systems. It is also recommended that the Security Log
is also read on a regular basis to identify if incorrect UTRNs / PTUTs are being entered on a regular basis.
17.4.1. Credit Top Up – WAN / HAN
PTUTs can be sent via the DCC to the meter.
© Honeywell - M450 001 1D - 23.05.2019
Operating & Maintenance Instructions
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