DLMS - Device Language Message Specification

What is the DLMS protocol?

DLMS — Device Language Message Specification

DLMS/ COSEM (or IEC 62056) is the main glob­al stan­dard for smart ener­gy meter­ing, con­trol and man­age­ment. It includes spec­i­fi­ca­tions for media-spe­cif­ic com­mu­ni­ca­tion pro­files, an object-ori­ent­ed data mod­el and an appli­ca­tion lay­er protocol.

  • DLMS/ COSEM smart meter­ing pro­to­col is not spe­cif­ic to elec­tric­i­ty meter­ing and can also be used for oth­er util­i­ties such as gas, water and heat.
  • The suite of stan­dards is devel­oped and main­tained by the DLMS User Asso­ci­a­tion (DLMS UA) and has been adopt­ed by the Inter­na­tion­al Elec­trotech­ni­cal Com­mis­sion (IEC) into the IEC 62056 series of standards.

DLMS/ COSEM con­sists of three main parts:

  • COSEM (Com­pan­ion Spec­i­fi­ca­tion for Ener­gy Meter­ing) describes the gen­er­al object mod­el and can be used for all kinds of applications.
  • OBIS (Object Iden­ti­fi­ca­tion Sys­tem) is the nam­ing sys­tem of the objects.
  • DLMS (Device Lan­guage Mes­sage Spec­i­fi­ca­tion) is the appli­ca­tion lay­er pro­to­col that is used to trans­form the data into mes­sages.

 

 

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