EN 61784-3-3:2017

SLOVENSKI STANDARD
01-februar-2018
1DGRPHãþD
SIST EN 61784-3-3:2010
Industrijska komunikacijska omrežja - Profili - 3-3. del: Funkciijska varnost
procesnih vodil - Dodatne specifikacije za CPF 3 (IEC 61784-3-3:2016)
Industrial communication networks - Profiles - Part 3-3: Functional safety fieldbuses -
Additional specifications for CPF 3 (IEC 61784-3-3:2016)
Industrielle Kommunikationsnetze - Profile - Teil 3-3: Funktional sichere Übertragung bei
Feldbussen - Zusätzliche Festlegungen für die Kommunikationsprofilfamilie 3 (IEC 61784
-3-3:2016)
Réseaux de communication industriels - Profils - Partie 3-3: Bus de terrain de sécurité
fonctionnelle - Spécifications supplémentaires pour CPF 3 (IEC 61784-3-3:2016)
Ta slovenski standard je istoveten z: EN 61784-3-3:2017
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.05 9HþVORMQHXSRUDEQLãNH Multilayer applications
UHãLWYH
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61784-3-3

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2017
ICS 25.040.40; 35.100.05 Supersedes EN 61784-3-3:2010
English Version
Industrial communication networks - Profiles - Part 3-3:
Functional safety fieldbuses - Additional specifications for CPF 3
(IEC 61784-3-3:2016)
Réseaux de communication industriels - Profils - Partie 3-3: Industrielle Kommunikationsnetze - Profile - Teil 3-3:
Bus de terrain de sécurité fonctionnelle - Spécifications Funktional sichere Übertragung bei Feldbussen -
supplémentaires pour CPF 3 Zusätzliche Festlegungen für die
(IEC 61784-3-3:2016) Kommunikationsprofilfamilie 3
(IEC 61784-3-3:2016)
This European Standard was approved by CENELEC on 2016-08-16. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61784-3-3:2017 E
European foreword
The text of document 65C/851/FDIS, future edition 3 of IEC 61784-3-3, prepared by SC 65C
"Industrial networks", of IEC/TC 65 "Industrial-process measurement, control and automation" was
submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61784-3-3:2017.

The following dates are fixed:
• latest date by which the document has to be (dop) 2018-05-10
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2020-11-10
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61784-3-3:2010.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 61784-3-3:2016 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60870-5-1 NOTE Harmonized as EN 60870-5-1.
IEC 61000-6-7 NOTE Harmonized as EN 61000-6-7.
IEC 61131-6 NOTE Harmonized as EN 61131-6.
IEC 61158 (all parts) NOTE Harmonized as EN 61158 (all parts).
IEC 61496 (all parts) NOTE Harmonized as EN 61496 (all parts).
IEC 61508-1:2010 NOTE Harmonized as EN 61508-1:2010 (not modified).
IEC 61508-4:2010 NOTE Harmonized as EN 61508-4:2010 (not modified).
IEC 61508-5:2010 NOTE Harmonized as EN 61508-5:2010 (not modified).
IEC 61508-6:2010 NOTE Harmonized as EN 61508-6:2010 (not modified).
IEC 61784-5 (all parts) NOTE Harmonized as EN 61784-5 (all parts).
IEC 61800-5-2 NOTE Harmonized as EN 61800-5-2.
IEC 61804 (all parts) NOTE Harmonized as EN 61804 (all parts)
IEC 62443 (all parts) NOTE Harmonized as prEN 62443 (all parts)
IEC/TR 62685 NOTE Harmonized as CLC/TR 62685.
ISO 10218-1 NOTE Harmonized as EN ISO 10218-1.
ISO 12100 NOTE Harmonized as EN ISO 12100.
ISO 13849 (all parts) NOTE Harmonized as EN ISO 13849 (all parts)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 60204-1 (mod) -  Safety of machinery - Electrical equipment - -
of machines - Part 1: General requirements
IEC 61000-6-2 -  Electromagnetic compatibility (EMC) - Part EN 61000-6-2 -
6-2: Generic standards - Immunity standard
for industrial environments
IEC 61010-1 -  Safety requirements for electrical equipment EN 61010-1 -
for measurement, control and laboratory use
- Part 1: General requirements
IEC 61131-2 2007 Programmable controllers - Part 2: EN 61131-2 2007
Equipment requirements and tests
IEC 61131-3 -  Programmable controllers - Part 3: EN 61131-3 -
Programming languages
IEC 61158-2 -  Industrial communication networks - EN 61158-2 -
Fieldbus specifications - Part 2: Physical
layer specification and service definition
IEC 61158-3-3 -  Industrial communication networks - EN 61158-3-3 -
Fieldbus specifications - Part 3-3: Data-link
layer service definition - Type 3 elements
IEC 61158-4-3 -  Industrial communication networks - EN 61158-4-3 -
Fieldbus specifications - Part 4-3: Data-link
layer protocol specification - Type 3
elements
IEC 61158-5-3 -  Industrial communication networks - EN 61158-5-3 -
Fieldbus specifications - Part 5-3:
Application layer service definition - Type 3
elements
IEC 61158-5-10 -  Industrial communication networks - EN 61158-5-10 -
Fieldbus specifications - Part 5-10:
Application layer service definition - Type 10
elements
IEC 61158-6-3 -  Industrial communication networks - EN 61158-6-3 -
Fieldbus specifications - Part 6-3:
Application layer protocol specification -
Type 3 elements
IEC 61158-6-10 -  Industrial communication networks - EN 61158-6-10 -
Fieldbus specifications - Part 6-10:
Application layer protocol specification -
Type 10 elements
IEC 61326-3-1 -  Electrical equipment for measurement, EN 61326-3-1 -
control and laboratory use – EMC
requirements – Part 3-1: Immunity
requirements for safety-related systems and
for equipment intended to perform safety-
related functions (functional safety) –
General industrial applications
IEC 61326-3-2 -  Electrical equipment for measurement, - -
control and laboratory use – EMC
requirements – Part 3-2: Immunity
requirements for safety-related systems and
for equipment intended to perform safety-
related functions (functional safety) –
Industrial applications with specified
electromagnetic environment
IEC 61508 series Functional safety of EN 61508 series
electrical/electronic/programmable electronic
safety-related systems
IEC 61508-2 -  Functional safety of EN 61508-2 -
electrical/electronic/programmable electronic
safety-related systems - Part 2:
Requirements for
electrical/electronic/programmable electronic
safety-related systems
IEC 61511 series Functional safety - Safety instrumented EN 61511 series
systems for the process industry sector
IEC 61784-1 -  Industrial communication networks - Profiles EN 61784-1 -
- Part 1: Fieldbus profiles
IEC 61784-2 -  Industrial communication networks - Profiles EN 61784-2 -
- Part 2: Additional fieldbus profiles for real-
time networks based on ISO/IEC 8802-3
IEC 61784-3 -  Industrial communication networks - Profiles EN 61784-3 -
- Part 3: Functional safety fieldbuses -
General rules and profile definitions
IEC 61784-5-3 -  Industrial communication networks - Profiles EN 61784-5-3 -
- Part 5-3: Installation of fieldbuses -
Installation profiles for CPF 3
IEC 61918 (mod) 2013 Industrial communication networks - EN 61918 2013
Installation of communication networks in
industrial premises
IEC 62061 -  Safety of machinery - Functional safety of EN 62061 -
safety-related electrical, electronic and
programmable electronic control systems
IEC 62280 2014 Railway applications - Communication, - -
signalling and processing systems - Safety
related communication in transmission
systems
ISO 13849-1 2006 Safety of machinery - Safety-related parts of EN ISO 13849-1 2008
control systems - Part 1: General principles
for design
ISO 13849-2 -  Safety of machinery - Safety-related parts of EN ISO 13849-2 -
control systems - Part 2: Validation
IEC/TR 62390 -  Common automation device - Profile - -
guideline
IEC 61784-3-3 ®
Edition 3.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –

Part 3-3: Functional safety fieldbuses – Additional specifications for CPF 3

Réseaux de communication industriels – Profils –

Partie 3-3: Bus de terrain de sécurité fonctionnelle – Spécifications

supplémentaires pour CPF 3
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40, 35.100.05 ISBN 978-2-8322-3481-5

– 2 – IEC 61784-3-3:2016  IEC 2016
CONTENTS
FOREWORD . 8
0 Introduction . 10
0.1 General . 10
0.2 Patent declaration . 12
1 Scope . 14
2 Normative references. 14
3 Terms, definitions, symbols, abbreviated terms and conventions. 16
3.1 Terms and definitions . 16
3.1.1 Common terms and definitions . 16
3.1.2 CPF 3: Additional terms and definitions . 22
3.2 Symbols and abbreviated terms . 26
3.2.1 Common symbols and abbreviated terms . 26
3.2.2 CPF 3: Additional symbols and abbreviated terms . 27
3.3 Conventions . 28
4 Overview of FSCP 3/1 (PROFIsafe™) . 28
5 General . 31
5.1 External documents providing specifications for the profile . 31
5.2 Safety functional requirements . 31
5.3 Safety measures . 31
5.4 Safety communication layer structure . 32
5.4.1 Principle of FSCP 3/1 safety communications . 32
5.4.2 CPF 3 communication structures . 33
5.5 Relationships with FAL (and DLL, PhL) . 36
5.5.1 Device model . 36
5.5.2 Application and communication relationships . 37
5.5.3 Data types . 37
6 Safety communication layer services . 38
6.1 F-Host services . 38
6.2 F-Device services. 41
6.3 Diagnosis . 43
6.3.1 Safety alarm generation . 43
6.3.2 F-Device safety layer diagnosis including the iPar-Server . 43
7 Safety communication layer protocol . 44
7.1 Safety PDU format . 44
7.1.1 Safety PDU structure . 44
7.1.2 Safety IO data . 45
7.1.3 Status and Control Byte . 45
7.1.4 (Virtual) MonitoringNumber . 47
7.1.5 (Virtual) MNR mechanism (F_CRC_Seed=0) . 48
7.1.6 (Virtual) MNR mechanism (F_CRC_Seed=1) . 48
7.1.7 CRC2 Signature (F_CRC_Seed=0) . 50
7.1.8 CRC2 Signature (F_CRC_Seed=1) . 51
7.1.9 Non-safety IO data . 52
7.2 FSCP 3/1 behavior . 52
7.2.1 General . 52

IEC 61784-3-3:2016  IEC 2016 – 3 –
7.2.2 F-Host state diagram . 53
7.2.3 F-Device state diagram . 56
7.2.4 Sequence diagrams . 60
7.2.5 Timing diagram for a MonitoringNumber reset . 66
7.2.6 Monitoring of safety times . 66
7.3 Reaction in the event of a malfunction . 69
7.3.1 Unintended repetition . 69
7.3.2 Loss . 70
7.3.3 Insertion . 70
7.3.4 Incorrect sequence . 70
7.3.5 Corruption of safety data . 70
7.3.6 Unacceptable delay . 70
7.3.7 Masquerade . 70
7.3.8 Addressing. 71
7.3.9 Memory failures within switches . 71
7.3.10 Loop-back . 72
7.3.11 Network boundaries and router . 72
7.4 F-Startup and parameter change at runtime . 73
7.4.1 Standard startup procedure . 73
7.4.2 iParameter assignment deblocking . 73
8 Safety communication layer management . 73
8.1 F-Parameter . 73
8.1.1 Summary . 73
8.1.2 F_Source/Destination_Address (Codename) . 74
8.1.3 F_WD_Time (F-Watchdog time) . 74
8.1.4 F_WD_Time_2 (secondary F-Watchdog time) . 75
8.1.5 F_Prm_Flag1 (Parameters for the safety layer management) . 75
8.1.6 F_Prm_Flag2 (Parameters for the safety layer management) . 77
8.1.7 F_iPar_CRC (value of iPar_CRC across iParameters) . 78
8.1.8 F_Par_CRC calculation (across F-Parameters) . 79
8.1.9 Structure of the F-Parameter record data object . 79
8.2 iParameter and iPar_CRC . 79
8.3 Safety parameterization. 80
8.3.1 Objectives . 80
8.3.2 GSDL and GSDML safety extensions . 81
8.3.3 Securing safety parameters and GSD data . 83
8.4 Safety configuration . 87
8.4.1 Securing the safety IO data description (CRC7) . 87
8.4.2 DataItem data type section examples . 88
8.5 Data type information usage . 92
8.5.1 F-Channel driver . 92
8.5.2 Rules for standard F-Channel drivers . 93
8.5.3 Recommendations for F-Channel drivers . 94
8.6 Safety parameter assignment mechanisms . 95
8.6.1 F-Parameter assignment . 95
8.6.2 General iParameter assignment . 95
8.6.3 System integration requirements for iParameterization tools . 96
8.6.4 iPar-Server . 98
9 System requirements . 107

– 4 – IEC 61784-3-3:2016  IEC 2016
9.1 Indicators and switches . 107
9.2 Installation guidelines . 107
9.3 Safety function response time . 107
9.3.1 Model . 107
9.3.2 Calculation and optimization . 109
9.3.3 Adjustment of watchdog times for FSCP 3/1 . 111
9.3.4 Engineering tool support . 112
9.3.5 Retries (repetition of messages) . 112
9.4 Duration of demands . 113
9.5 Constraints for the calculation of system characteristics . 114
9.5.1 Probabilistic considerations . 114
9.5.2 Safety related assumptions . 116
9.5.3 Non safety related constraints (availability) . 117
9.6 Maintenance . 117
9.6.1 F-Module commissioning / replacement . 117
9.6.2 Identification and maintenance functions . 117
9.7 Safety manual . 117
9.8 Wireless transmission channels . 119
9.8.1 Black channel approach . 119
9.8.2 Availability . 119
9.8.3 Security measures . 119
9.8.4 Stationary and mobile applications . 122
9.9 Conformance classes . 122
10 Assessment . 124
10.1 Safety policy . 124
10.2 Obligations. 124
Annex A (informative) Additional information for functional safety communication
profiles of CPF 3 . 126
A.1 Hash function calculation . 126
A.2 Example values for MonitoringNumbers (MNR) . 129
A.3 Response time measurements . 130
Annex B (informative) Information for assessment of the functional safety
communication profiles of CPF 3 . 133
Bibliography . 134

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) . 10
Figure 2 – Relationships of IEC 61784-3 with other standards (process) . 11
Figure 3 – Basic communication preconditions for FSCP 3/1 . 29
Figure 4 – Structure of an FSCP 3/1 safety PDU. 29
Figure 5 – Safety communication on CPF 3 . 30
Figure 6 – Standard CPF 3 transmission system . 32
Figure 7 – Safety layer architecture . 33
Figure 8 – Basic communication layers . 34
Figure 9 – Multiport switch bus structure . 34
Figure 10 – Linear bus structure . 35
Figure 11 – Crossing network borders with routers . 35
Figure 12 – Complete safety transmission paths . 36

IEC 61784-3-3:2016  IEC 2016 – 5 –
Figure 13 – IO Device model . 37
Figure 14 – FSCP 3/1 communication structure . 38
Figure 15 – F user interface of F-Host driver instances . 39
Figure 16 – Motivation for "Channel-related Passivation" . 40
Figure 17 – F-Device driver interfaces . 42
Figure 18 – Safety PDU for CPF 3 . 45
Figure 19 – Status Byte . 45
Figure 20 – Control Byte . 46
Figure 21 – The Toggle Bit function . 47
Figure 22 – F-Device MonitoringNumber . 48
Figure 23 – F-Host CRC2 signature generation (F_CRC_Seed=0) . 50
Figure 24 – Details of the CRC2 signature calculation (F_CRC_Seed=0) . 51
Figure 25 – CRC2 signature calculation (F_CRC_Seed=1) . 51
Figure 26 – Details of the CRC2 signature calculation (F_CRC_Seed=1) . 52
Figure 27 – Safety layer communication relationship . 52
Figure 28 – F-Host state diagram . 53
Figure 29 – F-Device state diagram . 57
Figure 30 – Interaction F-Host / F-Device during start-up . 60
Figure 31 – Interaction F-Host / F-Device during F-Host power off → on . 61
Figure 32 – Interaction F-Host / F-Device with delayed power on . 62
Figure 33 – Interaction F-Host / F-Device during power off → on . 63
Figure 34 – Interaction F-Host / F-Device while host recognizes CRC error . 64
Figure 35 – Interaction F-Host / F-Device while device recognizes CRC error . 65
Figure 36 – Impact of the MNR reset signal . 66
Figure 37 – Monitoring the message transit time F-Host ↔ F-Output . 67
Figure 38 – Monitoring the message transit time F-Input ↔ F-Host . 67
Figure 39 – Extended watchdog time on request . 69
Figure 40 – iParameter assignment deblocking by the F-Host . 73
Figure 41 – Effect of F_WD_Time_2 . 75
Figure 42 – F_Prm_Flag1. 75
Figure 43 – F_Check_SeqNr . 76
Figure 44 – F_Check_iPar. 76
Figure 45 – F_SIL . 76
Figure 46 – F_CRC_Length . 77
Figure 47 – F_CRC_Seed . 77
Figure 48 – F_Prm_Flag2. 77
Figure 49 – F_Passivation . 78
Figure 50 – F_Block_ID . 78
Figure 51 – F_Par_Version . 78
Figure 52 – F-Parameter . 79
Figure 53 – iParameter block . 80
Figure 54 – F-Parameter extension within the GSDML specification . 82
Figure 55 – F_Par_CRC signature including iPar_CRC . 84

– 6 – IEC 61784-3-3:2016  IEC 2016
Figure 56 – Algorithm to build CRC0 . 84
Figure 57 – GSD example in GSDML notation . 86
Figure 58 – DataItem section for F_IN_OUT_1 . 89
Figure 59 – DataItem section for F_IN_OUT_2 . 90
Figure 60 – DataItem section for F_IN_OUT_5 . 91
Figure 61 – DataItem section for F_IN_OUT_6 . 92
Figure 62 – F-Channel driver as "glue" between F-Device and user program . 93
Figure 63 – Layout example of an F-Channel driver . 94
Figure 64 – F-Parameter assignment for simple F-Devices and F-Slaves . 95
Figure 65 – F and iParameter assignment for complex F-Devices . 96
Figure 66 – System integration of CPD-Tools . 97
Figure 67 – iPar-Server mechanism (commissioning) . 98
Figure 68 – iPar-Server mechanism (for example F-Device replacement) . 99
Figure 69 – iPar-Server request coding ("status model") . 100
Figure 70 – Coding of SR_Type . 101
Figure 71 – iPar-Server request coding ("alarm model") . 102
Figure 72 – iPar-Server state diagram . 104
Figure 73 – Example safety function with a critical response time path . 108
Figure 74 – Simplified typical response time model . 108
Figure 75 – Frequency distributions of typical response times of the model . 109
Figure 76 – Context of delay times and watchdog times . 110
Figure 77 – Timing sections forming the FSCP 3/1 F_WD_Time . 111
Figure 78 – Frequency distribution of response times with message retries . 112
Figure 79 – Retries with CP 3/1 . 113
Figure 80 – Retries with CP 3/RTE . 113
Figure 81 – Residual error probabilities for the 24-bit CRC polynomial . 114
Figure 82 – Residual error probabilities for the 32-bit CRC polynomial . 115
Figure 83 – Monitoring of corrupted messages . 116
Figure 84 – Considerations against systematic loop-back configuration errors . 119
Figure 85 – Security for WLAN networks . 120
Figure 86 – Security for Bluetooth networks . 121
Figure A.1 – Typical "C" procedure of a cyclic redundancy check . 126
Figure A.2 – Comparison of the response time model and a real application . 130
Figure A.3 – Frequency distribution of measured response times . 131
Figure A.4 – F-Host with standard and safety-related application programs . 132

Table 1 – Deployed measures to master errors . 32
Table 2 – Data types for FSCP 3/1 . 37
Table 3 – Safety layer diagnosis messages . 44
Table 4 – MonitoringNumber of an F-Host PDU . 48
Table 5 – MonitoringNumber of an F-Device PDU . 48
Table 6 – MonitoringNumber of an F-Host PDU . 49
Table 7 – MonitoringNumber of an F-Device PDU . 49

IEC 61784-3-3:2016  IEC 2016 – 7 –
Table 8 – Definition of terms used in F-Host state diagram . 54
Table 9 – F-Host states and transitions . 54
Table 10 – Definition of terms used in Figure 29 . 57
Table 11 – F-Device states and transitions . 58
Table 12 – SIL monitor times. 69
Table 13 – Remedies for switch failures . 71
Table 14 – Safety network boundaries . 72
Table 15 – Codename octet order . 74
Table 16 – GSDL keywords for F-Parameters and F-IO structures . 81
Table 17 – GSD example in GSDL notation . 85
Table 18 – Serialized octet stream for the examples . 86
Table 19 – IO data structure items . 87
Table 20 – Sample F-Channel drivers . 93
Table 21 – Requirements for iParameterization . 96
Table 22 – Specifier for the iPar-Server Request . 101
Table 23 – Structure of the Read_RES_PDU ("read record") . 102
Table 24 – Structure of the Write_REQ_PDU ("write record") . 103
Table 25 – Structure of the Pull_RES_PDU ("Pull") . 103
Table 26 – Structure of the Push_REQ_PDU ("Push") . 103
Table 27 – iPar-Server states and transitions . 105
Table 28 – iPar-Server management measures . 106
Table 29 – Definition of terms in Figure 83 . 116
Table 30 – Information to be included in the safety manual . 118
Table 31 – Definition of terms in Figure 85 . 120
Table 32 – Security measures for WLAN (IEEE 802.11) . 120
Table 33 – Definition of terms in Figure 86 . 121
Table 34 – Security measures for Bluetooth (IEEE 802.15.1) . 122
Table 35 – F-Host conformance class requirements . 122
Table 36 – Main characteristics of protocol versions . 124
Table 37 – F-Host/F-Device conformance matrix . 124
Table A.1 – The table "Crctab24" for 24 bit CRC signature calculations . 127
Table A.2 – The table "Crctab32" for 32 bit CRC signature calculations . 128
Table A.3 – The table "Crctab16" for 16 bit CRC signature calculations . 129
Table A.4 – Values of CN_incrNR_64 and MNR for F-Host PDU . 130

– 8 – IEC 61784-3-3:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES –
Part 3-3: Functional safety fieldbuses –
Additional specifications for CPF 3

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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