{"id":245437,"date":"2024-10-19T16:08:33","date_gmt":"2024-10-19T16:08:33","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-61158-4-42019\/"},"modified":"2024-10-25T11:08:38","modified_gmt":"2024-10-25T11:08:38","slug":"bs-en-iec-61158-4-42019","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-61158-4-42019\/","title":{"rendered":"BS EN IEC 61158-4-4:2019"},"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 document 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 datalink 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 document, 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 document also specifies conformance requirements for systems implementing these procedures. This document 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\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      2<\/td>\nNational foreword <\/td>\n<\/tr>\n
      5<\/td>\nAnnex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
      7<\/td>\nCONTENTS <\/td>\n<\/tr>\n
      9<\/td>\nFOREWORD <\/td>\n<\/tr>\n
      11<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
      12<\/td>\n1 Scope
      1.1 General
      1.2 Specifications
      1.3 Procedures
      1.4 Applicability
      1.5 Conformance <\/td>\n<\/tr>\n
      13<\/td>\n2 Normative references
      3 Terms, definitions, symbols and abbreviations
      3.1 Reference model terms and definitions <\/td>\n<\/tr>\n
      15<\/td>\n3.2 Service convention terms and definitions <\/td>\n<\/tr>\n
      16<\/td>\n3.3 Terms and definitions <\/td>\n<\/tr>\n
      19<\/td>\n3.4 Symbols and abbreviations
      3.4.1 Constants, variables, counters and queues
      3.4.2 Miscellaneous
      4 Data Link Protocol Definition
      4.1 Overview of the DLprotocol <\/td>\n<\/tr>\n
      20<\/td>\n4.1.1 Functional classes
      4.1.2 Functions of the DLL
      Figures
      Figure 1 \u2013 Relationship of PhE, DLE and DLS-user <\/td>\n<\/tr>\n
      22<\/td>\nFigure 2 \u2013 DLE state diagram for confirmed and unconfirmed, unacknowledged DLPDUs <\/td>\n<\/tr>\n
      23<\/td>\nFigure 3 \u2013 DLE state diagram for confirmed acknowledged DLPDUs <\/td>\n<\/tr>\n
      24<\/td>\nFigure 4 \u2013 DLE state diagram for unconfirmed acknowledged DLPDUs <\/td>\n<\/tr>\n
      25<\/td>\nFigure 5 \u2013 Full duplex DLE receive state diagram
      Figure 6 \u2013 Full duplex DLE transmit state diagram <\/td>\n<\/tr>\n
      28<\/td>\nFigure 7 \u2013 Link access example <\/td>\n<\/tr>\n
      29<\/td>\n4.1.3 Service assumed from the PhL <\/td>\n<\/tr>\n
      31<\/td>\n4.2 General structure and encoding of PhIDUs and DLPDUs, and related elements of procedure
      4.2.1 PhIDU structure and encoding <\/td>\n<\/tr>\n
      32<\/td>\n4.2.2 Frame check sequence <\/td>\n<\/tr>\n
      33<\/td>\n4.2.3 Common DLPDU structure, encoding and elements of procedure <\/td>\n<\/tr>\n
      34<\/td>\nFigure 8 \u2013 Simple Type\u00a04-route format
      Figure 9 \u2013 Extended Type\u00a04-route format <\/td>\n<\/tr>\n
      35<\/td>\nFigure 10 \u2013 Complex Type\u00a04-route format
      Figure 11 \u2013 Immediate Type\u00a04-route format <\/td>\n<\/tr>\n
      36<\/td>\nFigure 12 \u2013 IP Type\u00a04-route format <\/td>\n<\/tr>\n
      37<\/td>\nFigure 13 \u2013 Control-status format
      Figure 14 \u2013 Data-field-format <\/td>\n<\/tr>\n
      38<\/td>\n4.3 DLPDU-specific structure, encoding and elements of procedure
      4.3.1 Confirmed DLPDU
      Tables
      Table 1 \u2013 Summary structure of DLPDUs <\/td>\n<\/tr>\n
      39<\/td>\n4.3.2 Unconfirmed DLPDU
      Table 2 \u2013 Structure of confirmed DLPDUs <\/td>\n<\/tr>\n
      40<\/td>\nTable 3 \u2013 Structure of unconfirmed DLPDUs <\/td>\n<\/tr>\n
      41<\/td>\n4.3.3 Acknowledge DLPDU
      4.3.4 Immediate-reply DLPDU
      Table 4 \u2013 Structure of acknowledge DLPDU
      Table 5 \u2013 Structure of immediate-reply DLPDU <\/td>\n<\/tr>\n
      42<\/td>\n4.4 DLservice elements of procedure
      4.4.1 Receipt of a DLUnitdata request primitive <\/td>\n<\/tr>\n
      43<\/td>\n4.4.2 Receipt of a DLUnitdata response primitive <\/td>\n<\/tr>\n
      44<\/td>\n4.4.3 Autonomous DLE acknowledge
      4.4.4 Generation of a DLUnitdata indication primitive <\/td>\n<\/tr>\n
      45<\/td>\n4.5 Route mechanism
      4.5.1 Request Type\u00a04-route generation <\/td>\n<\/tr>\n
      46<\/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
      47<\/td>\n4.5.2 DLroute generation
      Figure 18 \u2013 Complex and IP Type\u00a04-route generation
      Figure 19 \u2013 Simple DLroute generation <\/td>\n<\/tr>\n
      48<\/td>\n4.6 Link-access system
      Figure 20 \u2013 Extended DLroute generation
      Figure 21 \u2013 Complex and IP DLroute generation <\/td>\n<\/tr>\n
      49<\/td>\n4.7 Local variables, counters and queues
      4.7.1 V(ACPDU) \u2013 acknowledge confirmed PDU
      4.7.2 V(AUPDU) \u2013 acknowledge unconfirmed PDU
      4.7.3 V(NA) \u2013 node-address
      4.7.4 V(NDLE) \u2013 number of DLEs
      4.7.5 V(PNR) \u2013 permitted number of retries
      4.7.6 V(DC) \u2013 device class (simple or normal)
      4.7.7 V(BR) \u2013 bit rate
      4.7.8 V(MID) \u2013 max indication delay <\/td>\n<\/tr>\n
      50<\/td>\n4.7.9 V(DMRT) \u2013 default max retry time
      4.7.10 Q(UR) \u2013 user request queue
      4.7.11 C(LAC) \u2013 link access counter
      4.7.12 C(LIC) \u2013 link idle counter <\/td>\n<\/tr>\n
      51<\/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>\n2019<\/td>\n52<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":245444,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-245437","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\/245437","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\/245444"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=245437"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=245437"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=245437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}