IEC PAS 62409:2005

Real-time Ethernet for Plant Automation (EPA)(R)

defines the EPA (Ethernet for Plant Automation) system structure, data link layer protocol, application layer service definition and protocol based on ISO/IEC 8802-3:2000, RFC 791, RFC 768 and so on. XML-based device description is also defined

General Information

• Status: Replaced
• Publication Date: 27-Jun-2005
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: SC 65C - Industrial networks
• Drafting Committee: WG 9 - TC 65/SC 65C/WG 9
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 14-Dec-2007

Relations

• Replaced By: IEC 61158-6-14:2007 - Industrial communication networks - Fieldbus specifications - Part 6-14: Application layer protocol specification - Type 14 elements
• Effective Date: 05-Sep-2023
• Replaced By: IEC 61158-4-14:2007 - Industrial communication networks - Fieldbus specifications - Part 4-14: Data-link layer protocol specification - Type 14 elements
• Effective Date: 05-Sep-2023
• Replaced By: IEC 61158-5-14:2007 - Industrial communication networks - Fieldbus specifications - Part 5-14: Application layer service definition - Type 14 elements
• Effective Date: 05-Sep-2023
• Replaced By: IEC 61158-3-14:2007 - Industrial communication networks - Fieldbus specifications - Part 3-14: Data-link layer service definition - Type 14 elements
• Effective Date: 05-Sep-2023

Standards Content (Sample)

PUBLICLY
IEC
AVAILABLE
PAS 62409
SPECIFICATION
First edition
2005-06
Real-time Ethernet for ®
Plant Automation (EPA )
Reference number
IEC/PAS 62409:2005(E)
Publication numbering
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PUBLICLY
IEC
AVAILABLE
PAS 62409
SPECIFICATION
First edition
Pre-Standard
2005-06
Real-time Ethernet for ®
Plant Automation (EPA )
© IEC 2005 – Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
XH
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – PAS 62409 © IEC:2005 (E)

CONTENTS
INTRODUCTION.10

FOREWORD.11

1 Scope.13

2 Normative references.13

3 Common terms and definitions .14

3.1 ISO/IEC 7498-1 Terms.14
3.2 ISO/IEC 8824-1 Terms.15
3.3 ISO/IEC 10731 Terms.15
3.4 IEC 61158-5 Terms.16
3.5 IEC 61804-2 Terms.17
3.6 ISO/IEC 8802-3 Terms.17
3.7 Additional terms and definitions .18
4 Abbreviated terms and acronyms .20
5 Conventions .22
5.1 Convention for Object definitions.22
5.2 Conventions for services definitions .23
5.2.1 General .23
5.2.2 Service parameters .23
5.3 Conventions for state machines .24
6 EPA system architecture.25
6.1 Overview .25
6.2 EPA architecture.26
6.2.1 Relationship to the ISO OSI Reference Model .26
6.2.2 EPA system architecture .27
6.3 Network Topology.29
6.3.1 Overview .29
6.3.2 EPA devices.31
6.4 Communication process between EPA devices.31
6.4.1 Overview .31
6.4.2 EPA link object .32

6.4.3 An example.33
6.5 EPA system configuration and startup .35
6.5.1 Configuration.35
6.5.2 Device Startup.36
7 EPA data link layer protocol .36
7.1 Overview .36
7.2 DLL model.37
7.2.1 Medium Access Control (MAC) .37
7.2.2 Logic Link Control (LLC).37
7.2.3 EPA Communication Scheduling Management Entity (ECSME).37
7.2.4 DLL services .37
7.2.5 Transaction between DLL and PhL .37
7.3 EPA communication scheduling procedure .38
7.3.1 General .38

PAS 62409 © IEC:2005 (E) – 3 –

7.3.2 Scheduling procedure .39

7.3.3 Priority.45

7.3.4 Time synchronization.45

7.4 ECSME PDU structure .45

7.4.1 NonPeriodicDataAnnunciation PDU .45

7.4.2 EndofNonPeriodicDataSending PDU.46

7.4.3 EPA PDU.47

7.5 Encoding of ECSME Packet .48

7.5.1 Encoding of NonPeriodicDataAnnunciation message .48

7.5.2 Encoding of EndofNonPeriodicDataSending message.48

7.5.3 Encoding of EPA message .49
8 EPA application layer service definition.49
8.1 Concepts.49
8.1.1 Overview .49
8.1.2 Architectural relationships.49
8.1.3 EPA application layer structure.51
8.1.4 EPA application layer naming and addressing .52
8.1.5 Architecture summary.52
8.1.6 EPA application layer services procedures.52
8.2 Data Type ASE.52
8.3 Communication model specification.52
8.3.1 EPA AE .52
8.3.2 EPA System Management ASE.53
8.3.3 Domain ASE.77
8.3.4 Event ASE .83
8.3.5 Variable ASE.88
8.3.6 Application relationship ASE .95
8.3.7 EPA Socket Mapping ASE.98
8.4 Summary of Services in EPA application layer.101
9 EPA application layer protocol specification .102
9.1 Syntax description .102
9.1.1 Fixed format PDU description .102
9.1.2 Confirmed request service.103
9.1.3 Confirmed response service .103
9.1.4 Confirmed error.103

9.1.5 Error type.103
9.1.6 Error class.104
9.1.7 Unconfirmed request .104
9.1.8 EPA application layer PDU .104
9.1.9 APDU header format .104
9.1.10 EPA System Manage Entity services.105
9.1.11 EPA Application Access Entity (AAE) services .107
9.1.12 Abstract syntax of data type.110
9.2 Transfer Syntax .111
9.2.1 Encodingof basic data types .111
9.2.2 Object definitions in EPA System Management ASE .118
9.2.3 Definition of objects used in EPA application access entity.124
9.2.4 Encoding of EPA APDU Header.128
9.2.5 Encoding of EPA System Management Entity service parameters .129

– 4 – PAS 62409 © IEC:2005 (E)

9.2.6 Encoding of AAE Services.136

9.3 Protocol State Machine.143

9.4 EPA SME State Machines.143

9.4.1 Primitives.143

9.4.2 Protocol State Machine Descriptions .145

9.4.3 State Transitions.146

9.4.4 Function descriptions .148

9.5 Application Access Entity Protocol Machine.154

9.5.1 Primitives.154

9.5.2 AAE state machine.15
...