Readout To Dlms - Landis+Gyr E650 Series User Manual

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5.7.2

Readout to DLMS

DLMS specification
Objective
Principle
DLMS items
© Landis+Gyr
Stored values
e.g. 1.6.1*04
e.g. 1.6.1&04
The identification by the energy supply company itself uses an identification
number. ID1.1 (designation of ownership by the energy supply company),
ID1.2 (any desired number) or ID2.1 (serial number) are available. The
identification is comprised as follows in this case:
/LGZ...
/LGZ 4...
/LGZ4 \2...
/LGZ4\2 \B32...
/LGZ4\2\B32 12345678
While the readout according to IEC 62056-21 uses a predefined protocol,
readout to DLMS enables the power supply company to read out values
individually. The company therefore has systematic access to specific
values without being influenced by other values that are not required.
Various meter manufacturers – including Landis+Gyr – together with
related organisations, have compiled the language specification DLMS
(Device Language Message Specification).
The objective of DLMS is to use a common language for data exchange in
energy measurement and other sectors. In addition to end units such as
meters, tariff units, etc. DLMS also defines the interfaces, transmission
channels and system software.
DLMS delivery oriented protocol can be compared to sending a letter: the
sender writes the address of the recipient on the letter and hands it to the
post office for transport. The way in which the postal department transports
the letter is of no consequence to the sender and receiver. The only
important thing is that the address of the recipient is clearly shown and that
the letter is received, read and it can be seen from whom the letter
originates.
Units with DLMS operate in a similar way. They provide the values –
termed objects – required by the receiver (e.g. control centre) and pass
them via interface to the transport medium (channel). How the values reach
the recipient is again immaterial for both parties.
DLMS is an object-oriented language. The DLMS objects

have an unique name in the form of the EDIS identification number

contain the value in an exactly defined form and

are configured in a similarly exactly defined format.
Examples are number of resets with date and time, cumulative maxima,
rolling mean values, maxima, energy status, associated stored values, etc.
The hyphen following the identification
number and the rate (1.6.1) denotes the
type of resetting:
*04 Resetting made internally or
remote controlled
&04 Resetting performed manually
Manufacturer
Transmission rate 4 = 4800 bps
Extended communication possibility
2 = DLMS-compatible meter
Meter Firmware version
Identification number specified
by parameterisation (maximum
8 characters)
D000030108 en m – E650 Series 3 – ZMD300AT/CT – User Manual
Operation
(Landis+Gyr)