4.3 · Read Instantaneous Prepay Values

18.16a · Where the SMETS1 GSME only supports reading of the value equivalent to PaymentDebtRegister (with its Message Mapping Catalogue meaning) to the nearest whole number of GBP , the value returned by the S1SP in the PaymentDebtRegister (with its Message Mapping Catalogue meaning) shall be the milli pence equivalent of the nearest whole number of GBP.

18.16b · Where the SMETS1 ESME or SMETS1 GSME has a value equivalent to DebtRecoveryRatePriceScale (with it DUIS meaning) greater than -5 and the SMETS1 Device returns the values equivalent to the TimeDebtRegister1and TimeDebtRegister2 (with their Message Mapping Catalogue meanings) to that scale , the values returned by the S1SP in the TimeDebtRegister1and TimeDebtRegister2 (with their Message Mapping Catalogue meanings) shall be rounded down so that they are accurate only to the scale specified in the DebtRecoveryRatePriceScale value.

18.16c · Where the target SMETS1 ESME or SMETS1 GSME does not support reading of Accumulated Debt Register, Emergency Credit Balance, Meter Balance, Payment Debt Register and the Time Debt Registers [1..2] (with their SMETS1 meanings) when the Payment Mode is Credit Mode and the Device is in Credit Mode (with their SMETS meanings), the S1SP shall return a SMETS1 Response indicating failure.

18.16d · Where the target SMETS1 ESME or SMETS1 GSME also records decreases in the Emergency Credit Balance and increases in the Accumulated Debt Register as decreases in the Meter Balance (with their SMETS1 meanings) then the corresponding values returned will reflect this behaviour.