{"id":244307,"date":"2024-10-19T16:02:54","date_gmt":"2024-10-19T16:02:54","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-61158-4-202014\/"},"modified":"2024-10-25T11:01:49","modified_gmt":"2024-10-25T11:01:49","slug":"bs-en-61158-4-202014","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-61158-4-202014\/","title":{"rendered":"BS EN 61158-4-20:2014"},"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 International 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 inter actions 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 International 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\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      6<\/td>\nEnglish
      \n
      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
      11<\/td>\n3.2 Service convention terms and definitions <\/td>\n<\/tr>\n
      12<\/td>\n3.3 Common terms and definitions <\/td>\n<\/tr>\n
      13<\/td>\nFigures
      \n
      Figure 1 \u2013 Relationships of DLSAPs, DLSAP-addresses and group DLaddresses <\/td>\n<\/tr>\n
      14<\/td>\n3.4 Additional Type 20 definitions <\/td>\n<\/tr>\n
      20<\/td>\n3.5 Common symbols and abbreviations
      3.5.1 Data units
      3.5.2 Miscellaneous <\/td>\n<\/tr>\n
      21<\/td>\n3.6 Additional Type 20 symbols and abbreviations <\/td>\n<\/tr>\n
      22<\/td>\n4 Data-link layer protocol specification
      4.1 Overview <\/td>\n<\/tr>\n
      23<\/td>\n4.2 Parameters, timers and variables
      4.2.1 Parameters <\/td>\n<\/tr>\n
      24<\/td>\n4.2.2 Timers
      4.2.3 Variables <\/td>\n<\/tr>\n
      25<\/td>\n4.3 Logical link control
      4.3.1 General DLPDU structure
      Figure\u00a02\u00a0\u2013\u00a0DLPDU Structure
      Figure\u00a03\u00a0\u2013\u00a0Delimiter Structure <\/td>\n<\/tr>\n
      26<\/td>\nFigure\u00a04\u00a0\u2013\u00a0Construction of 1-octet address field <\/td>\n<\/tr>\n
      27<\/td>\nFigure\u00a05\u00a0\u2013\u00a0Construction of 5-octet address field
      Figure 6 \u2013 APDU format <\/td>\n<\/tr>\n
      28<\/td>\n4.3.2 DLPDU specific encoding and procedures <\/td>\n<\/tr>\n
      29<\/td>\n4.3.3 Framing
      4.3.4 Error detection
      Figure\u00a07\u00a0\u2013\u00a0DLPDU framing <\/td>\n<\/tr>\n
      30<\/td>\n4.3.5 Slave response to communication error
      Figure\u00a08\u00a0\u2013\u00a0Two dimensional parity detection <\/td>\n<\/tr>\n
      31<\/td>\nFigure\u00a09\u00a0\u2013\u00a0Communication error response DLL payload
      Tables
      \n
      Table\u00a01\u00a0\u2013\u00a0Slave response to communication error
      Table\u00a02 \u2013 Communication error code values <\/td>\n<\/tr>\n
      32<\/td>\n4.4 Medium access control
      4.4.1 Overview <\/td>\n<\/tr>\n
      33<\/td>\nFigure\u00a010\u00a0\u2013\u00a0MAC state machines
      Figure\u00a011\u00a0\u2013\u00a0Master controlled medium access <\/td>\n<\/tr>\n
      34<\/td>\n4.4.4 Token passing summary
      Figure\u00a012\u00a0\u2013\u00a0Burst mode controlled medium access
      Table\u00a03 \u2013 Token passing <\/td>\n<\/tr>\n
      35<\/td>\n4.4.5 XMIT machine
      Figure\u00a013\u00a0\u2013\u00a0XMIT state machine
      Table\u00a04 \u2013 XMIT state transitions <\/td>\n<\/tr>\n
      36<\/td>\n4.4.6 RECV machine
      Figure\u00a014\u00a0\u2013\u00a0RECV state machine <\/td>\n<\/tr>\n
      37<\/td>\n4.4.7 Slave MAC machine
      Table\u00a05 \u2013 RECV state transitions <\/td>\n<\/tr>\n
      38<\/td>\nFigure\u00a015\u00a0\u2013\u00a0Slave MAC state machine <\/td>\n<\/tr>\n
      39<\/td>\nTable\u00a06 \u2013 Slave MAC state transitions <\/td>\n<\/tr>\n
      40<\/td>\n4.4.8 Master MAC machine
      Figure\u00a016\u00a0\u2013\u00a0Master MAC state machine <\/td>\n<\/tr>\n
      41<\/td>\nTable\u00a07 \u2013 Master MAC state transitions <\/td>\n<\/tr>\n
      43<\/td>\n4.5 DL-management-information
      Table\u00a08 \u2013 Master DL parameters
      Table\u00a09 \u2013 Slave DL parameters <\/td>\n<\/tr>\n
      44<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 20 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>\n46<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":244309,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-244307","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\/244307","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\/244309"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=244307"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=244307"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=244307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}