BS EN IEC 61158-4-4:2019 – TC:2020 Edition
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Tracked Changes. Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 4 elements
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 102 |
IEC 61158-4-4:2019 specifies 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 and 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. This third edition cancels and replaces the second edition published in 2014 and constitutes a technical revision. The main changes include the following significant technical changes with respect to the previous edition: lt;br /gt;a) additional user parameters to services; lt;br /gt;b) additional services to support distributed objects;c) additional secure services
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 52 | undefined |
| 55 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 57 | CONTENTS |
| 59 | FOREWORD |
| 61 | INTRODUCTION |
| 62 | 1 Scope 1.1 General 1.2 Specifications 1.3 Procedures 1.4 Applicability 1.5 Conformance |
| 63 | 2 Normative references 3 Terms, definitions, symbols and abbreviations 3.1 Reference model terms and definitions |
| 65 | 3.2 Service convention terms and definitions |
| 66 | 3.3 Terms and definitions |
| 69 | 3.4 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 |
| 70 | 4.1.1 Functional classes 4.1.2 Functions of the DLL Figures Figure 1 – Relationship of PhE, DLE and DLS-user |
| 72 | Figure 2 – DLE state diagram for confirmed and unconfirmed, unacknowledged DLPDUs |
| 73 | Figure 3 – DLE state diagram for confirmed acknowledged DLPDUs |
| 74 | Figure 4 – DLE state diagram for unconfirmed acknowledged DLPDUs |
| 75 | Figure 5 – Full duplex DLE receive state diagram Figure 6 – Full duplex DLE transmit state diagram |
| 78 | Figure 7 – Link access example |
| 79 | 4.1.3 Service assumed from the PhL |
| 81 | 4.2 General structure and encoding of PhIDUs and DLPDUs, and related elements of procedure 4.2.1 PhIDU structure and encoding |
| 82 | 4.2.2 Frame check sequence |
| 83 | 4.2.3 Common DLPDU structure, encoding and elements of procedure |
| 84 | Figure 8 – Simple Type 4-route format Figure 9 – Extended Type 4-route format |
| 85 | Figure 10 – Complex Type 4-route format Figure 11 – Immediate Type 4-route format |
| 86 | Figure 12 – IP Type 4-route format |
| 87 | Figure 13 – Control-status format Figure 14 – Data-field-format |
| 88 | 4.3 DLPDU-specific structure, encoding and elements of procedure 4.3.1 Confirmed DLPDU Tables Table 1 – Summary structure of DLPDUs |
| 89 | 4.3.2 Unconfirmed DLPDU Table 2 – Structure of confirmed DLPDUs |
| 90 | Table 3 – Structure of unconfirmed DLPDUs |
| 91 | 4.3.3 Acknowledge DLPDU 4.3.4 Immediate-reply DLPDU Table 4 – Structure of acknowledge DLPDU Table 5 – Structure of immediate-reply DLPDU |
| 92 | 4.4 DLservice elements of procedure 4.4.1 Receipt of a DLUnitdata request primitive |
| 93 | 4.4.2 Receipt of a DLUnitdata response primitive |
| 94 | 4.4.3 Autonomous DLE acknowledge 4.4.4 Generation of a DLUnitdata indication primitive |
| 95 | 4.5 Route mechanism 4.5.1 Request Type 4-route generation |
| 96 | Figure 15 – Source / destination designator Figure 16 – Simple Type 4-route generation Figure 17 – Extended Type 4-route generation |
| 97 | 4.5.2 DLroute generation Figure 18 – Complex and IP Type 4-route generation Figure 19 – Simple DLroute generation |
| 98 | 4.6 Link-access system Figure 20 – Extended DLroute generation Figure 21 – Complex and IP DLroute generation |
| 99 | 4.7 Local variables, counters and queues 4.7.1 V(ACPDU) – acknowledge confirmed PDU 4.7.2 V(AUPDU) – acknowledge unconfirmed PDU 4.7.3 V(NA) – node-address 4.7.4 V(NDLE) – number of DLEs 4.7.5 V(PNR) – permitted number of retries 4.7.6 V(DC) – device class (simple or normal) 4.7.7 V(BR) – bit rate 4.7.8 V(MID) – max indication delay |
| 100 | 4.7.9 V(DMRT) – default max retry time 4.7.10 Q(UR) – user request queue 4.7.11 C(LAC) – link access counter 4.7.12 C(LIC) – link idle counter |
| 101 | Bibliography |
