11
DLMS/COSEM
11.1 DLMS Standardization
11.1.1 The DLMS UA
The Device Language Message Specification1 user association was formed in 1997 by utilities and manufacturers to develop open standards for multiutility (all energy types) meter data exchange, for all application segments. As of 2010 it counts over 180 members, as well as multiple associate member organizations: ESMIG, M-Bus, Euridis.org, Selma, DVGW, PPCEM and the ZigBee Alliance. Over 140 meter types, from over 40 manufacturers, have been certified.
The DLMS UA maintains the specification, is the registration authority for IEC 62 056 (OBIS codes), performs technical support and training, and operates the conformance specification scheme. The DLMS UA is organized in two working groups:
- The Maintenance and Development WG, handling the development of the standard.
- The Final End Users and Developers WG, focused on use cases and gathering feedback from deployment and interop testing, led by French utility EDF.
11.1.2 DLMS/COSEM, the Colored Books
DLMS/COSEM separates the aspects of data modeling, data identification, messaging and transport:
- COSEM, the companion specification for energy metering, specifies the data model, that is, the standard object interfaces, with their attributes and methods. It maintains a registry of object interfaces (OBIS data identification codes). xDLMS messaging is used to access COSEM objects attributes and methods.
- DLMS itself is an ...
