DLMS User Association

Questions and answers - FAQ

A) General questions

	What is DLMS?
	What is COSEM?
	What is the DLMS User Association?
	What are the benefits of DLMS/COSEM?
	How is DLMS/COSEM different from other standards for meter data exchange?
	Where is DLMS/COSEM used?
	Who provides DLMS/COSEM metering systems?
	How can I join the DLMS User Association?
	Is DLMS/COSEM an open specification?
	What communication media are supported?
	Can I use DLMS/COSEM over the internet?
	Can I use DLMS/COSEM over PLC?
	What is xDLMS?

B) Questions on the DLMS/COSEM specification

	Is DLMS/COSEM suitable for simple meters?
	Short name or logical name referencing?
	What is the purpose of the upper HDLC address?
	What is the purpose of the management logical device?
	What is the purpose of the public client?
	The Association objects, what are they?
	How to connect a logical device?
	What is the logical device name?
	Security features, what is supported by COSEM?
	OBIS names, what are they?
	Manufacturer specific objects, are they possible?
	What elements of the specification need to be registered?
	How can a meter report an event?
	Are examples for DLMS/COSEM information exchange available?

C) Questions on Conformance Testing

	Conformance testing, how can I get my implementation tested?
	Conformance test reports, how can I obtain?
	How can I get my implementation registered as DLMS/COSEM compliant?
	How the conformance test tool is maintained?
	How should products be labelled after passing the conformance test?
	If I make enhancements to my product after it has passed conformance test, do I need to re-test my product?
	Product configurations, do they have to be re-tested?

Note: This document answers some Frequently Asked Questions concerning the DLMS/COSEM specification and its use. IT has been compiled by the experts of the DLMS User Association. The answers to the questions are not intended to provide a definitive technical answer but rather to inform new users of the specification.

Feedback is welcome, in terms of comments on this document or a new questions for consideration.

Copyright: This material may be freely reproduced, except for advertising, endorsement or commercial purposes. The DLMS User Association must be acknowledged as the source.