SN EN 62056-31 : 2000

1 General
      1.1 Scope
      1.2 Normative references
2 General description
      2.1 Basic vocabulary
      2.2 Layers and protocols
      2.3 Specification language
      2.4 Communication services for local bus data
             exchange without DLMS
             2.4.1 Remote reading exchange
             2.4.2 Remote programming exchange
             2.4.3 Point to point remote transfer
                      exchange
             2.4.4 Broadcast remote transfer frame
             2.4.5 Bus initialization frame
             2.4.6 Forgotten station call exchange
             2.4.7 Frame fields
             2.4.8 Principle of the energy remote supply
             2.4.9 Non-energized station preselection
                      exchange
             2.4.10 Communication exchange after
                      preselection
             2.4.11 Alarm function
      2.5 Communication services for local bus data
             exchange with DLMS
      2.6 Systems management
3 Local bus data exchange without DLMS
      3.1 Physical layer
             3.1.1 Physical-62056-31 protocol
             3.1.2 Physical parameters
             3.1.3 Timing diagrams
             3.1.4 Physical services and service
                      primitives
             3.1.5 State transitions
             3.1.6 List and processing of errors
      3.2 Data Link layer
             3.2.1 Link-62056-31 protocol
             3.2.2 Management of exchanges
             3.2.3 Data Link services and service
                      primitives
             3.2.4 Data Link parameters
             3.2.5 State transitions
             3.2.6 List and processing of errors
      3.3 Application layer
             3.3.1 Link-62056-31 protocol
             3.3.2 Application services and service
                      primitives
             3.3.3 Application parameters
             3.3.4 State transitions
             3.3.5 List and processing of errors
4 Local bus data exchange with DLMS
      4.1 Physical layer
      4.2 Data Link layer
             4.2.1 Link-E/D protocol
             4.2.2 Management of exchanges
             4.2.3 Data Link services and service
                      primitives
             4.2.4 Data Link parameters
             4.2.5 State transitions
             4.2.6 List and processing of errors
      4.3 Application layer
             4.3.1 Transport sub-layer
             4.3.2 Application sub-layer
5 Local bus data exchange - Hardware
      5.1 General
      5.2 General characteristics
             5.2.1 Signal transmission at 50 kHz
             5.2.2 Energy supply signal transmission
             5.2.3 Simple Secondary Station and multiple
                      Secondary Station
      5.3 Bus specification
             5.3.1 General characteristics
             5.3.2 Cable characteristics
             5.3.3 Wiring
      5.4 Magnetic plug
             5.4.1 Function
             5.4.2 Common mechanical characteristics
             5.4.3 Electrical Block diagram with simple
                      plug
             5.4.4 Electrical Block Diagram with energy
                      supply plug
      5.5 Functional specifications of Primary Station
             transmitter (for 50 kHz signal)
      5.6 Functional specifications of Primary Station
             receiver (for 50 kHz signal)
      5.7 Functional specification of Secondary Station
             transmitter (for 50 kHz signal)
      5.8 Functional specifications of Secondary Station
             receiver (for 50 kHz signal)
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 (architecture without
                    DLMS)
Annex H (normative) Systems management implementation
Annex I (informative) Information about exchanges
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications

Details two new architectures for local bus data exchange with stations either energized or not. The bus supplies energy for data exchange, for non-energized stations. First architecture completes the base protocol with remote transfer services. The second architecture gives operation of dlms services by using the same physical layer and medium. The compatibility guarantees possible use of Iec 61142 and iec 62056-31 equipment on the same bus.