I.S. EN IEC 61158-4-21:2019
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Industrial communication networks - Fieldbus specifications - Part 4-21: Data-link layer protocol specification - Type 21 elements
Hardcopy , PDF
English
09-07-2019
14-05-2023
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations
4 Overview of the data-link protocol
5 General structure and encoding
6 DLPDU structure and procedure
7 DLE elements of procedure
8 Constants and error codes
Bibliography
The DLL provides basic time-critical data communications between devices in an automated environment.
| Committee |
TC 65
|
| DocumentType |
Standard
|
| ISBN |
978-2-8322-6777-6
|
| Pages |
122
|
| ProductNote |
THIS STANDARD ALSO REFERS TO- IETF RFC 768, IETF RFC 791, IETF RFC 793 The date of any NSAI previous adoption may not match the date of its original CEN/CENELEC document.
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| Standards | Relationship |
| EN IEC 61158-4-21:2019 | Identical |
| IEC 61158-4-21:2019 | Identical |
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