Iskra WM3M4 - Power Loss Behaviour; Unexpected Reset Behaviour

DIGITAL SIGNATURE (VALID ONLY FOR WM3M4C)
User’s Manual WM3M4 &WM3M4C
43
6.5.18 Input / Output Data Table
47100
47611
Input Message (JSON/Binary)
47612
48123
Output Message (JSON)
48124
48155
Public Key (raw)
48156
48187
Signature (raw)
48188
48315
Signature ASN.1
48316
Binary Output Message Lenght
48317
Binary Output Message
Table 17: Input/Output table
6.6 Power loss behaviour
If power loss happens during charging, meter continues to measure energy and duration after power
is restored. All events are saved (begin and tariff changes) but meter does not save time, because it is
not relevant anymore (meter is without battery). Meter detects this irregular state and reports it with
measurement status 2 in register 47000.
Control unit must set time and billing dataset to continue. Then End transaction command can be
send. Meter will generate and sign complete transaction with time error flag (“EF”: “t”).
6.7 Unexpected reset behaviour
Meter will set Energy error flag (“EF”: “E”) if unexpected reset happens during charging. Measured
energy consumption is not valid.