IEC 61334-6:2000 pdf download-Distribution automation using distribution line carrier systems – Part 6: A-XDR encoding rule.
1 Scope and object This part of IEC 61 334 defines a set of encoding rules – the A-XDR 3) encoding rules – that may be used to derive the specification of a transfer syntax for values of types defined in the DLMS core standard using the ASN.1 notation (see IEC 61 334-4-41 ). These A-XDR encoding rules are also to be applied for decoding such a transfer syntax in order to identify the data values being transferred. The A-XDR encoding rules • are used at the time of communication; • provide optimal 4) encoding for DLMS PDUs. NOTE Provided that A-XDR ensures optimal encoding for DLMS PDUs, it is intended to be the default encoding rule for DLMS-based communication protocols. Nevertheless, the default – and also the possibly usable optional – encoding rules will be specified in the Application Layer document of the given protocol (for example, IEC 61 334-4-42), as part of the Application context. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61 334. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 61 334 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. IEC 61 334-4-41 :1 996, Distribution automation using distribution line carrier systems – Part 4: Data communication protocols – Section 41: Application protocols – Distribution line message specification IEC 61 334-4-42:1 996, Distribution automation using distribution line carrier systems – Part 4: Data communication protocols – Section 42: Application protocols – Application layer.