{"id":244312,"date":"2024-10-19T16:02:56","date_gmt":"2024-10-19T16:02:56","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61158-4-42014\/"},"modified":"2024-10-25T11:01:52","modified_gmt":"2024-10-25T11:01:52","slug":"bs-en-61158-4-42014","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61158-4-42014\/","title":{"rendered":"BS EN 61158-4-4:2014"},"content":{"rendered":"

1.1 General<\/h3>\n

The data-link layer provides basic time-critical messaging communications between devices in an automation environment.<\/p>\n

This protocol provides a means of connecting devices through a partial mesh network, such that most failures of an interconnection between two devices can be circumvented. In common practice the devices are interconnected in a non-redundant hierarchical manner reflecting application needs<\/p>\n

1.2 Specifications<\/h3>\n

This standard specifies<\/p>\n

    \n
  1. \n

    procedures for the timely transfer of data and control information from one data-link user entity to a peer user entity, and among the data-link entities forming the distributed data-link service provider;<\/p>\n<\/li>\n

  2. \n

    the structure of the fieldbus DLPDUs used for the transfer of data and control information by the protocol of this standard, and their representation as physical interface data units.<\/p>\n<\/li>\n<\/ol>\n

    1.3 Procedures<\/h3>\n

    The procedures are defined in terms of<\/p>\n

      \n
    1. \n

      the interactions between peer DL-entities (DLEs) through the exchange of fieldbus DLPDUs;<\/p>\n<\/li>\n

    2. \n

      the interactions between a DL-service (DLS) provider and a DLS-user in the same system through the exchange of DLS primitives;<\/p>\n<\/li>\n

    3. \n

      the interactions between a DLS-provider and a Ph-service provider in the same system through the exchange of Ph-service primitives.<\/p>\n<\/li>\n<\/ol>\n

      1.4 Applicability<\/h3>\n

      These procedures are applicable to instances of communication between systems which support time-critical communications services within the data-link layer of the OSI or fieldbus reference models, and which require the ability to interconnect in an open systems interconnection environment.<\/p>\n

      Profiles provide a simple multi-attribute means of summarizing an implementation\u2019s capabilities, and thus its applicability to various time-critical communications needs.<\/p>\n

      1.5 Conformance<\/h3>\n

      This standard also specifies conformance requirements for systems implementing these procedures. This standard does not contain tests to demonstrate compliance with such requirements.<\/p>\n

      PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      6<\/td>\nEnglish
      CONTENTS <\/td>\n<\/tr>\n
      8<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
      9<\/td>\n1 Scope
      1.1 General
      1.2 Specifications
      1.3 Procedures
      1.4 Applicability
      1.5 Conformance <\/td>\n<\/tr>\n
      10<\/td>\n2 Normative references
      3 Terms, definitions, symbols and abbreviations
      3.1 Reference model terms and definitions <\/td>\n<\/tr>\n
      12<\/td>\n3.2 Service convention terms and definitions <\/td>\n<\/tr>\n
      13<\/td>\n3.3 Terms and definitions <\/td>\n<\/tr>\n
      16<\/td>\n3.4 Symbols and abbreviations
      4 Data Link Protocol Definition
      4.1 Overview of the DLprotocol <\/td>\n<\/tr>\n
      17<\/td>\nFigures
      Figure 1 \u2013 Relationship of PhE, DLE and DLS-user <\/td>\n<\/tr>\n
      19<\/td>\nFigure 2 \u2013 DLE state diagram for confirmed and unconfirmed, unacknowledged DLPDUs <\/td>\n<\/tr>\n
      20<\/td>\nFigure 3 \u2013 DLE state diagram for confirmed acknowledged DLPDUs <\/td>\n<\/tr>\n
      21<\/td>\nFigure 4 \u2013 DLE state diagram for unconfirmed acknowledged DLPDUs <\/td>\n<\/tr>\n
      22<\/td>\nFigure 5 \u2013 Full duplex DLE receive state diagram
      Figure 6 \u2013 Full duplex DLE transmit state diagram <\/td>\n<\/tr>\n
      25<\/td>\nFigure 7 \u2013 Link access example <\/td>\n<\/tr>\n
      28<\/td>\n4.2 General structure and encoding of PhIDUs and DLPDUs, and related elements of procedure <\/td>\n<\/tr>\n
      31<\/td>\nFigure 8 \u2013 Simple Type\u00a04-route format
      Figure 9 \u2013 Extended Type\u00a04-route format <\/td>\n<\/tr>\n
      32<\/td>\nFigure 10 \u2013 Complex Type\u00a04-route format
      Figure 11 \u2013 Immediate Type\u00a04-route format <\/td>\n<\/tr>\n
      33<\/td>\nFigure 12 \u2013 IP Type\u00a04-route format <\/td>\n<\/tr>\n
      34<\/td>\nFigure 13 \u2013 Control-status format
      Figure 14 \u2013 Data-field-format <\/td>\n<\/tr>\n
      35<\/td>\n4.3 DLPDU-specific structure, encoding and elements of procedure
      Tables
      Table 1 \u2013 Summary structure of DLPDUs <\/td>\n<\/tr>\n
      36<\/td>\nTable 2 \u2013 Structure of confirmed DLPDUs <\/td>\n<\/tr>\n
      37<\/td>\nTable 3 \u2013 Structure of unconfirmed DLPDUs <\/td>\n<\/tr>\n
      38<\/td>\nTable 4 \u2013 Structure of acknowledge DLPDU
      Table 5 \u2013 Structure of immediate-reply DLPDU <\/td>\n<\/tr>\n
      39<\/td>\n4.4 DLservice elements of procedure <\/td>\n<\/tr>\n
      42<\/td>\n4.5 Route mechanism <\/td>\n<\/tr>\n
      43<\/td>\nFigure 15 \u2013 Source \/ destination designator
      Figure 16 \u2013 Simple Type\u00a04-route generation
      Figure 17 \u2013 Extended Type\u00a04-route generation <\/td>\n<\/tr>\n
      44<\/td>\nFigure 18 \u2013 Complex and IP Type\u00a04-route generation
      Figure 19 \u2013 Simple DLroute generation <\/td>\n<\/tr>\n
      45<\/td>\n4.6 Link-access system
      Figure 20 \u2013 Extended DLroute generation
      Figure 21 \u2013 Complex and IP DLroute generation <\/td>\n<\/tr>\n
      46<\/td>\n4.7 Local variables, counters and queues <\/td>\n<\/tr>\n
      48<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 4 elements<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      BSI<\/b><\/a><\/td>\n2014<\/td>\n50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":244317,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-244312","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/244312","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/244317"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=244312"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=244312"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=244312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}