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2020/04/07 WCC Lite user manual
12 DLMS
12.1 Overview
DLMS (Device Language Message Specification) is a suite of standards developed and maintained
by the DLMS User Association. COSEM (Companion Specification for Energy Metering) includes a
set of specifications that define the transport and application layers of the DLMS protocol.
In DLMS/COSEM all the data in electronic utility meters and devices are represented by means of
mapping them to appropriate classes and related attribute values.
Objects are identified with the help of OBIS (OBject Identification System) codes (as per IEC
62056­61).
The DLMS driver allows only for readout and displaying only numeric values of DLMS object data
fields. Connection via TCP or serial (RS232/RS485) port are supported.
The setup of the DLMS driver consists of communication and tag configuration. Protocol specific
parameters (except for DLMS/IEC handshake mode) apply for both serial and IP connections.
12.2 Configuration
12.2.1 Devices section
serialnumber , server_address and id define the meter addressing parameters. Either
serialnumber (meter serial number) or a combination of server_address (physical server
address) and
id
(logical server address) is used. If a serial number is provided, physical and logical
server addresses are ignored.
master_address
defines the client address. This usually depends on the authentication used. Most
meters support 16 for no authentication.
type
defines the object referencing. SN should be used for short name referencing and LN for
logical name referencing.
mode
defines the initial handshake mode. IEC initiates the connection according to IEC 62056­21
(’/?!’), at the default initial baud rate (300 7E1). DLMS initiates the connection in DLMS mode. The
IEC setting is irrelevant when an IP connection is used.
timeout_ms
defines the reply timeout for telegrams both via serial and TCP.
auth and password define the authentication mode and password. This can be set to None, or
other authentication variant (see table below), depending on the mode configured and supported
by the particular meter.
ip
and
port
define the IP address and TCP port for DLMS communication via IP.
When
ip
and
port
are configured, any serial port settings are ignored and
connection is initiated only via IP.
Connection parameters are device specific and can differ between makes,
models and utility companies. For initial connection settings please refer to the
configuration of the particular meter.
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1.4.0 | ELSETA | DLMS