BS EN 61158-4-18:2012
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Industrial communication networks. Fieldbus specifications – Data-link layer protocol specification. Type 18 elements
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 40 |
IEC 61158-4-18:2010 specifies the protocol which provides communication opportunities to all participating data-link entities in a synchronously-starting cyclic manner, according to a pre-established schedule, and in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those data-link entities. The described 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. Profiles provide a simple multi-attribute means of summarizing an implementation’s capabilities, and thus its applicability to various time-critical communications needs. This bilingual version (2012-08) corresponds to the monolingual English version, published in 2010-08. This second edition cancels and replaces the first edition published in 2007 and constitutes a technical revision. The main changes with respect to the previous edition are: Editorial improvements and Addition of cyclic data segmenting.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | CONTENTS |
| 9 | INTRODUCTION |
| 10 | 1 Scope 1.1 General 1.2 Specifications 1.3 Procedures |
| 11 | 1.4 Applicability 1.5 Conformance 2 Normative references 3 Terms, definitions, symbols, abbreviations and conventions 3.1 Reference model terms and definitions |
| 12 | 3.2 Type 18: Symbols 3.3 Type 18: Additional conventions 4 DL-protocol overview 4.1 Introduction |
| 13 | 4.2 Polled DLE classes 4.3 Packed DLE classes 5 DLPDU encoding and transmission 5.1 DL – PhL interface |
| 14 | 5.2 DLPDU transmission encoding Figure 1 – HDLC flag |
| 15 | Tables Table 1 – HDLC convention summary |
| 16 | 6 DLPDU – basic structure 6.1 Overview 6.2 Address field Table 2 – HDLC exception summary Table 3 – Master-polled DLE address octet 0 |
| 17 | 6.3 Status field Table 4 – Slave-polled DLE address octet 0 Table 5 – Master-packed DLE address octet 0 |
| 18 | Table 6 – Master-polled DLE status octet 0 Table 7 – Master-polled DLE status octet 1 |
| 19 | 6.4 Data field Table 8 – Slave-polled DLE status octet 0 Table 9 – slave-polled DLE status octet 1 Table 10 – Slave-packed DLE status |
| 20 | Table 11 – DLPDU – Master-polled DLE acyclic data field |
| 21 | 7 DLPDU – Detailed structure, segmenting and reassembly Table 12 – DLPDU – Slave-polled DLE acyclic data field |
| 22 | Table 13 – Example master-polled DLE RY contiguous data field Table 14 – Example slave-polled DLE RX contiguous data field Table 15 – Example master-polled DLE RWw contiguous data field Table 16 – Example slave-polled DLE RWr contiguous data field |
| 23 | Table 17 – Bit-oriented segment header |
| 24 | Table 18 – Polled DLE acyclic segment number field Table 19 – Slave-polled DLE acyclic data type and sequence field |
| 25 | 8 Data transmission methods 8.1 Overview 8.2 Master-polled method Table 20 – DLPDU – Polled class poll with data Table 21 – Slave-polled DLE response timeout |
| 26 | 8.3 Level A slave-polled method Table 22 – DLPDU – Poll Table 23 – DLPDU – End of cycle Table 24 – slave-polled DLE request timeout |
| 27 | 8.4 Level B slave-polled method 8.5 Level C slave-polled method Table 25 – DLPDU – Level A poll response Table 26 – DLPDU – Level B poll response |
| 28 | 8.6 Master-packed method Table 27 – DLPDU – Level C poll response Table 28 – DLPDU – Packed class poll with data Table 29 – Slave-packed DLE response timeout |
| 29 | 8.7 Slave-packed method Table 30 – Slave-packed DLE request timeout Table 31 – DLPDU – Packed class poll response |
| 30 | 9 DL-management – procedures 9.1 Overview 9.2 Establish master-polled DLE procedure Table 32 – Slave-packed DLE time constraints Table 33 – DLPDU – Poll with test data |
| 31 | 9.3 Establish slave-polled DLE procedure Table 34 – Slave-polled DLE response timeout Table 35 – DLPDU – Poll test Table 36 – Slave-polled DLE request timeout |
| 32 | Table 37 – DLPDU – Poll test response Table 38 – Slave-polled DLE configuration parameter |
| 33 | 9.4 Establish master-packed DLE procedure Table 39 – DLPDU – Baud rate synchronization Table 40 – DLPDU – Poll test Table 41 – Slave-packed DLE response timeout |
| 34 | 9.5 Establish slave-packed DLE procedure Table 42 – Slave-packed DLE number of occupied DLE station slots Table 43 – Slave-packed DLE baud rate synchronization timeout |
| 35 | 9.6 Release connection procedure 9.7 Suspend connection procedure 9.8 Resume connection procedure Table 44 – Slave-packed DLE Master timeout Table 45 – DLPDU – Packed poll test response |
| 36 | 9.9 Activate standby Master procedure |
| 37 | Bibliography |
