IEC 61131-5:2000

Programmable controllers - Part 5: Communications

IEC 61131-5:2000 specifies communication aspects of a programmable controller. It specifies from the viewpoint of a PC how any device can communicate with a PC as a server and how a PC can communicate with any device. In particular, it specifies the behavior of the PC as it provides services on behalf of other devices and the services the PC application program can request from other devices. This bilingual version (2012-08) corresponds to the monolingual English version, published in 2000-11.
This publication is to be read in conjunction with the IEC 61131 series.

Automates programmables - Partie 5: Communications

La CEI 61131-5:2000 spécifie les aspects des automates programmables (AP) relatifs à la communication. Elle spécifie, du point de vue d'un AP, la manière dont chaque périphérique peut communiquer avec un AP en tant que serveur et la manière dont l'AP peut communiquer avec chaque périphérique. Elle spécifie, en particulier, le comportement de l'AP lorsqu'il fournit des services pour le compte d'autres périphériques et les services que le programme application de l'AP peut demander aux autres périphériques. La présente version bilingue (2012-08) correspond à la version anglaise monolingue publiée en 2000-11.
Cette publication doit être lue conjointement avec la série CEI 61131.

General Information

• Status: Published
• Publication Date: 14-Nov-2000
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: SC 65B - Measurement and control devices
• Drafting Committee: WG 7 - TC 65/SC 65B/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 30-Nov-2000
• Completion Date: 15-Nov-2000

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD
61131-5
First edition
2000-11
Programmable controllers –
Part 5:
Communications
Automates programmables –
Partie 5:
Communications
Reference number
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INTERNATIONAL IEC
STANDARD
61131-5
First edition
2000-11
Programmable controllers –
Part 5:
Communications
Automates programmables –
Partie 5:
Communications
 IEC 2000  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 Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
XD
International Electrotechnical Commission
For price, see current catalogue

– 2 – 61131-5  IEC:2000(E)
CONTENTS
Page
FOREWORD . 6
Clause
1 Scope . 8
2 Normative references . 8
3 Definitions. 9
4 Symbols and abbreviations. 11
5 Models . 11
5.1 PC network communication model. 11
5.2 PC functional model . 12
5.3 PC hardware model. 14
5.4 Software model . 14
6 PC communication services. 15
6.1 PC subsystems and their status . 15
6.2 Application specific functions. 22
7 PC communication function blocks . 28
7.1 Overview of the communication function blocks . 28
7.2 Semantic of communication FB parameters. 29
7.3 Device verification. 34
7.4 Polled data acquisition . 38
7.5 Programmed data acquisition . 41
7.6 Parametric control. 51
7.7 Interlocked control . 54
7.8 Programmed alarm report . 61
7.9 Connection management. 69
7.10 Example for the use of communication function blocks . 73
8 Compliance and implementer specific features and parameters . 76
8.1 Compliance. 76
8.2 Implementation specific features and parameters . 77
Annex A (normative) Mapping to ISO/IEC 9506-5. 78
Annex B (normative) PC behavior using ISO/IEC 9506-2. 98
Figure 1 – Scope of this part of IEC 61131. 8
Figure 2 – PC communication model. 12
Figure 3 – Programmable controller functional model . 13
Figure 4 – Programmable controller hardware model. 14
Figure 5 – PC software model. 15
Figure 6 – Programmable controller power supply . 19
Figure 7 – Type description of status information . 21
Figure 8 – Interlocked control timeline. 24
Figure 9 – Function REMOTE_VAR . 31

61131-5  IEC:2000(E) – 3 –
Figure 10 – Principle of status signalling . 32
Figure 11 – Timing diagram of the ERROR and STATUS outputs . 32
Figure 12 – STATUS function block . 34
Figure 13 – USTATUS function block . 35
Figure 14 – Timing diagram of the STATUS function block . 35
Figure 15 – State diagram of STATUS function block . 36
Figure 16 – State diagram of USTATUS function block. 37
Figure 17 – READ function block . 39
Figure 18 – Timing diagram of READ function block. 39
Figure 19 – State diagram of READ function block . 40
Figure 20 – Programmed data acquisition data flow . 41
Figure 21 – USEND function block . 42
Figure 22 – URCV function block . 42
Figure 23 – Timing diagram of USEND and URCV function blocks . 43
Figure 24 – State diagram of USEND function block. 43
Figure 25 – State diagram of URCV function block . 45
Figure 26 – BSEND function block . 47
Figure 27 – BRCV function block . 48
Figure 28 – Timing diagram of BSEND and BRCV function blocks. 48
Figure 29 – State diagram of BSEND function block. 49
Figure 30 – State diagram of BRCV function block . 50
Figure 31 – WRITE function block. 52
Figure 32 – Timing diagram of WRITE function block . 53
Figure 33 – State diagram of WRITE function block . 53
Figure 34 – SEND function block . 55
Figure 35 – RCV function block. 56
Figure 36 – Timing diagram of SEND and RCV function blocks . 57
Figure 37 – State diagram of SEND function block . 58
Figure 38 – State diagram of RCV function block . 60
Figure 39 – NOTIFY function block . 62
Figure 40 – ALARM function block . 63
Figure 41 – Timing diagram of ALARM function block . 64
Figure 42 – State diagram of NOTIFY function block . 65
Figure 43 – State diagram of ALARM function block. 67
Figure 44 – CONNECT function block . 69
Figure 45 – Timing diagram of CONNECT function block . 70
Figure 46 – State diagram of CONNECT function block. 71
Figure 47 – Example in function block diagram language . 76
Table 1 – Status presenting entities . 16
Table 2 – PC summary status . 17
Table 3 – Status of I/O subsystem . 18
Table 4 – Status of processing unit . 18

– 4 – 61131-5  IEC:2000(E)
Table 5 – Status of power supply . 19
Table 6 – Status of memory. 19
Table 7 – Status of communication subsystem . 20
Table 8 – Status of implementer specific subsystem . 20
Table 9 – Presentation of status information . 21
Table 10 – Device verification features . 23
Table 11 – Data acquisition features . 23
Table 12 – Control features . 24
Table 13 – Alarm reporting features . 25
Table 14 – Startable and stoppable units . 25
Table 15 – Meaning of I/O State . 26
Table 16 – I/O state. 26
Table 17 – Execution and I/O control features. 26
Table 18 – Loadable units. 27
Table 19 – Application program transfer features . 27
Table 20 – Connection management features . 28
Table 21 – Overview of the communication function blocks . 28
Table 22 – Semantic of communication FB parameters . 30
Table 23 – Values of the SCOPE parameter. 31
...

IEC 61131-5 ®
Edition 1.0 2000-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Programmable controllers –
Part 5: Communications
Automates programmables –
Partie 5: Communications
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IEC 61131-5 ®
Edition 1.0 2000-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Programmable controllers –
Part 5: Communications
Automates programmables –
Partie 5: Communications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XD
ICS 25.040.40; 35.240.50 ISBN 978-2-83220-262-3

– 2 – 61131-5  IEC:2000
CONTENTS
FOREWORD . 6

1 Scope . 8
2 Normative references. 8
3 Definitions . 9
4 Symbols and abbreviations . 11
5 Models . 11
5.1 PC network communication model . 11
5.2 PC functional model . 12
5.3 PC hardware model . 14
5.4 Software model. 14
6 PC communication services . 15
6.1 PC subsystems and their status . 15
6.2 Application specific functions . 22
7 PC communication function blocks . 28
7.1 Overview of the communication function blocks . 28
7.2 Semantic of communication FB parameters . 29
7.3 Device verification . 34
7.4 Polled data acquisition . 38
7.5 Programmed data acquisition . 41
7.6 Parametric control . 51
7.7 Interlocked control . 54
7.8 Programmed alarm report . 61
7.9 Connection management . 69
7.10 Example for the use of communication function blocks . 73
8 Compliance and implementer specific features and parameters . 76
8.1 Compliance . 76
8.2 Implementation specific features and parameters . 77

Annex A (normative) Mapping to ISO/IEC 9506-5 . 78
Annex B (normative) PC behavior using ISO/IEC 9506-2 . 98

Figure 1 – Scope of this part of IEC 61131 . 8
Figure 2 – PC communication model . 12
Figure 3 – Programmable controller functional model . 13
Figure 4 – Programmable controller hardware model . 14
Figure 5 – PC software model . 15
Figure 6 – Programmable controller power supply . 19
Figure 7 – Type description of status information . 21
Figure 8 – Interlocked control timeline . 24
Figure 9 – Function REMOTE_VAR . 31
Figure 10 – Principle of status signalling . 32
Figure 11 – Timing diagram of the ERROR and STATUS outputs . 32
Figure 12 – STATUS function block . 34

61131-5  IEC:2000 – 3 –
Figure 13 – USTATUS function block . 35
Figure 14 – Timing diagram of the STATUS function block . 35
Figure 15 – State diagram of STATUS function block . 36
Figure 16 – State diagram of USTATUS function block . 37
Figure 17 – READ function block . 39
Figure 18 – Timing diagram of READ function block . 39
Figure 19 – State diagram of READ function block . 40
Figure 20 – Programmed data acquisition data flow . 41
Figure 21 – USEND function block . 42
Figure 22 – URCV function block . 42
Figure 23 – Timing diagram of USEND and URCV function blocks . 43
Figure 24 – State diagram of USEND function block . 43
Figure 25 – State diagram of URCV function block . 45
Figure 26 – BSEND function block . 47
Figure 27 – BRCV function block . 47
Figure 28 – Timing diagram of BSEND and BRCV function blocks . 48
Figure 29 – State diagram of BSEND function block . 49
Figure 30 – State diagram of BRCV function block . 50
Figure 31 – WRITE function block . 52
Figure 32 – Timing diagram of WRITE function block . 53
Figure 33 – State diagram of WRITE function block . 53
Figure 34 – SEND function block . 55
Figure 35 – RCV function block . 56
Figure 36 – Timing diagram of SEND and RCV function blocks . 57
Figure 37 – State diagram of SEND function block . 58
Figure 38 – State diagram of RCV function block . 60
Figure 39 – NOTIFY function block . 62
Figure 40 – ALARM function block . 63
Figure 41 – Timing diagram of ALARM function block . 64
Figure 42 – State diagram of NOTIFY function block . 65
Figure 43 – State diagram of ALARM function block . 67
Figure 44 – CONNECT function block . 69
Figure 45 – Timing diagram of CONNECT function block . 70
Figure 46 – State diagram of CONNECT function block . 71
Figure 47 – Example in function block diagram language . 76

Table 1 – Status presenting entities . 16
Table 2 – PC summary status .
...