IEC 62056-3-1:2013

FOREWORD
1 Scope
2 Normative references
3 Abbreviations
4 General description
5 Local bus data exchange without DLMS
6 Local bus data exchange with DLMS
7 Local bus data exchange with DLMS/COSEM
8 Local bus data exchange - Hardware
Annex A (normative) - Specification language
Annex B (normative) - Timing types and characteristics
Annex C (normative) - List of fatal errors
Annex D (normative) - Coding the command code
        field of frames
Annex E (normative) - Principle of the CRC
Annex F (normative) - Random integer generation for
        response from forgotten stations
Annex G (normative) - Random number generation
        for authentication (profile without DLMS)
Annex H (normative) - Systems management implementation
Annex I (informative) - Information about exchanges
Bibliography

IEC 62056-3-1:2013 describes three profiles for local bus data exchange with stations either energized or not. For non-energized stations, the bus supplies energy for data exchange. Three different profiles are supported:
- base profile;
- profile with DLMS;
- profile with DLMS/COSEM. The three profiles use the same physical layer and they are fully compatible, meaning that devices implementing any of these profiles can be operated on the same bus. The transmission medium is twisted pair using carrier signalling and it is known as the Euridis Bus. This first edition cancels and replaces the first edition of IEC 62056-31, issued in 1999, and constitutes a technical revision. The main technical changes are:
- addition of a profile which makes use of the IEC 62056 DLMS/COSEM Application layer and COSEM object model,
- review of the data link layer which is split into two parts: a pure Data Link layer; a "Support Manager" entity managing the communication media;
- ability to negotiate the communication speed, bringing baud rate up to 9 600 bauds.