User Manual
LoRaWAN
mME DTZ541 Three-phase electricity meter
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8 Tariff control
For the DTZ541 with double tariff function, the tariffs may be activated and controlled via terminals
13 and 15 or via the LMN interface. Control via the LMN interface has priority over the control signal
supplied to the control terminals. If the activation via the LMN interface is recognized and there is no
further activation for a period of more than 90s, the priority status is canceled again and activation via
control terminals is used. If the DTZ541 is in the operating mode "Operation in a secure SMGw
environment", the dual tariff function must be set to the "suppressed" state for all energy directions.
8.1 Configuration of the dual tariff function
Another register with data type "Unsigned8" and class "Data" must be included under the code
numbers (01 00 5E 31 01 0D). This can be written as well as read. Writing automatically deactivates
the dual tariff function. Writing with impermissible bit combinations must be answered with the
attention "81 81 C7 C7 FE 05". The permitted bit coding and corresponding functions are described
in the following table.
Task
Bit7
MS
B
Bit6 Bit5
Bit4 Bit3 Bit2 Bit1
Bit0
LSB
DTF prepared in energy direction "1.8 ..."
1
DTF "1.8 ..." suppressed in energy direction
0
DTF prepared in energy direction "2.8 ..."
1
DTF suppressed in energy direction "2.8 ..."
0
Assignment "LMN tariff control ON"
Or Register "... 8.1" is active
1
Assignment "LMN tariff control ON"
Or Register "... 8.2" is engaged
0
reserved
0
0
0
0
0
8.2 LMN command for tariff switching
Another register with data type “Boolean” and class “Data” must be included under the code numbers
(01 00 5E 31 01 0C). This can be written as well as read. Writing (TRUE or FALSE) automatically
activates the dual tariff function. The letter is to be ignored (and answered with the attention "81 81
C7 C7 FE 05") if at least one double tariff function is not in the "prepared" state. If the double tariff
