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BS EN IEC 61784-3-8:2021

BS EN IEC 61784-3-8:2021

$215.11

Industrial communication networks. Profiles – Functional safety fieldbuses. Additional specifications for CPF8

Published By Publication Date Number of Pages
BSI 2021 116
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This part of IEC 61784-3 (all parts) specifies a safety communication layer (services and protocol) based on CPF 8 of IEC 61784-1, IEC 61784-2 and IEC 61158 Type 18 and Type 23. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This safety communication layer is intended for implementation in safety devices only.

NOTE 1 It does not cover electrical safety and intrinsic safety aspects. Electrical safety relates to hazards such as electrical shock. Intrinsic safety relates to hazards associated with potentially explosive atmospheres.

This document defines mechanisms for the transmission of safety-relevant messages among participants within a distributed network using fieldbus technology in accordance with the requirements of IEC 61508 (all parts)1 for functional safety. These mechanisms may be used in various industrial applications such as process control, manufacturing automation and machinery.

This document provides guidelines for both developers and assessors of compliant devices and systems.

NOTE 2 The resulting SIL claim of a system depends on the implementation of the selected functional safety communication profile within this system – implementation of a functional safety communication profile according to this document in a standard device is not sufficient to qualify it as a safety device.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
12 FOREWORD
14 0 Introduction
0.1 General
Figure 1 – Relationships of IEC 617843 with other standards (machinery)
15 Figures
Figure 2 – Relationships of IEC 617843 with other standards (process)
16 0.2 Patent declaration
17 1 Scope
2 Normative references
18 3 Terms, definitions, symbols, abbreviated terms and conventions
3.1 Terms and definitions
19 3.1.1 Common terms and definitions
25 3.1.2 CPF 8: Additional terms and definitions
26 3.2 Symbols and abbreviated terms
3.2.1 Common symbols and abbreviated terms
27 3.2.2 CPF 8: Additional symbols and abbreviated terms
3.3 Conventions
4 Overview
5 General
6 Safety communication layer services
28 7 Safety communication layer protocol
8 Safety communication layer management
9 System requirements
10 Assessment
11 FSCP 8/1
11.1 Scope – FSCP 8/1
11.2 Normative references – FSCP 8/1
11.3 Terms, definitions, symbols, abbreviated terms and conventions – FSCP 8/1
11.4 Overview of FSCP 8/1 (CC-Link Safety™)
29 11.5 General – FSCP 8/1
11.5.1 External documents providing specifications for the profile
11.5.2 Safety functional requirements
11.5.3 Safety measures
30 Tables
Table 1 – Selection of the various measures for possible errors
31 11.5.4 Safety communication layer structure
32 11.5.5 Relationships with FAL (and DLL, PhL)
11.6 Safety communication layer services for FSCP 8/1
11.6.1 General
11.6.2 SASEs
Figure 3 – Relationship between SCL and the other layers of IEC 61158 Type 18
33 11.6.3 SARs
34 11.6.4 Process data SAR ASEs
35 11.7 Safety communication layer protocol for FSCP 8/1
11.7.1 Safety PDU format
36 Table 2 – M1 safety device manager attribute format
Table 3 – S1 safety device manager attribute format
Table 4 – M1 safety connection manager attribute format
Table 5 – S1 safety connection manager attribute format
37 Table 6 – M1 safety cyclic transmission attribute format
38 Table 7 – S1 safety cyclic transmission attribute format
Table 8 – M1 safety device manager attribute encoding
39 Table 9 – S1 safety device manager attribute encoding
Table 10 – M1 safety connection manager attribute encoding
Table 11 – S1 safety connection manager attribute encoding
40 Table 12 – M1 safety cyclic transmission attribute encoding
42 Table 13 – S1 safety cyclic transmission attribute encoding
43 11.7.2 State description
44 Figure 4 – State diagram
46 Table 14 – Safety master monitor timer operation
Table 15 – Safety slave monitor timer operation
Table 16 – Safety data monitor timer operation
48 11.8 Safety communication layer management for FSCP 8/1
11.8.1 General
11.8.2 Connection establishment and confirmation processing
11.8.3 Safety slave verification
Table 17 – Details of connection establishment and confirmation processing
Table 18 – Details of slave information verification processing
49 11.9 System requirements for FSCP 8/1
11.9.1 Indicators and switches
Table 19 – Details of safety slave parameter transmission processing
50 11.9.2 Installation guidelines
11.9.3 Safety function response time
Table 20 – Monitor LEDs
51 Table 21 – Safety function response time calculation
Table 22 – Safety function response time definition of terms
52 11.9.4 Duration of demands
11.9.5 Constraints for calculation of system characteristics
11.9.6 Maintenance
11.9.7 Safety manual
11.10 Assessment for FSCP 8/1
53 12 FSCP 8/2
12.1 Scope – FSCP 8/2
12.2 Normative references – FSCP 8/2
12.3 Terms, definitions, symbols, abbreviated terms and conventions – FSCP 8/2
12.4 Overview of FSCP 8/2 (CC-Link IE™ Safety communication function)
12.5 General – FSCP 8/2
12.5.1 External documents providing specifications for the profile
54 12.5.2 Safety functional requirements
12.5.3 Safety measures
55 Table 23 – Selection of the various measures for possible errors
56 Figure 5 – Detection of unintended repetition
Figure 6 – Detection of incorrect sequence
57 Figure 7 – Detection of loss
58 Figure 8 – Detection of unacceptable delay by time stamps
Figure 9 – Detection of unacceptable delay by timer
59 12.5.4 Safety communication layer structure
Figure 10 – Protocol Hierarchy
60 12.5.5 Relationships with FAL (and DLL, PhL)
12.6 Safety communication layer services for FSCP 8/2
12.6.1 General
12.6.2 Connection reestablishment services
Table 24 – SSStart
Table 25 – SSRestart
61 12.6.3 Data transmission services
Table 26 – SSInvokeFunc
Table 27 – SSRead
62 12.6.4 Connection termination notification services
12.7 Safety communication layer protocol for FSCP 8/2
12.7.1 Safety PDU format
Table 28 – SS-Write
Table 29 – SSTerminate
63 Figure 11 – Safety PDU Structure
Table 30 – Safety PDU elements
64 Figure 12 – CTRL Configuration
Table 31 – CTRL Elements
67 Figure 13 – SASEM and SASES TS
Figure 14 – SData during safety refresh
68 Figure 15 – SData not during safety refresh
Figure 16 – SData header configuration
69 12.7.2 Safety FAL service protocol machine (SFSPM)
Figure 17 – CRC calculation
Figure 18 – Communication models
70 Figure 19 – SFSPM state transition diagram
Table 32 – State list
72 Figure 20 – Connection establishment sequence
73 Figure 21 – Optional sequence during connection establishment sequence
Figure 22 – Communication sequence during safety refresh communication
74 Figure 23 – Offset measurement and generation sequence during safety refresh communication
75 Figure 24 – SFSPMM state transition diagram
Table 33 – SFSPMM timers
76 Table 34 – SFSPMM state transition table
79 Figure 25 – Sequence other than during safety refresh
Figure 26 – SConnectreq
Table 35 – support_functions
80 Figure 27 – SInitConfirmNetPrmreq
Figure 28 – net_prm_list
Figure 29 – SInitVerifyStnPrmreq
81 Figure 30 – stn_prm_list
Figure 31 – SInvokeFuncreq
82 Figure 32 – SWriteErrorInforeq
Table 36 – error_category
Table 37 – error_category for AL errors
83 Figure 33 – date_and_time_of_occurence
Table 38 – error_code
84 Figure 34 – SFSPMS state transition diagram
Table 39 – SFSPMS timers
85 Table 40 – SFSPMS state transition table
89 Figure 35 – Sequence other than during safety refresh
Figure 36 – SConnectrsp
90 Figure 37 – SInitConfirmNetPrmrsp
Figure 38 – SInitVerifyStnPrmrsp
91 Figure 39 – SInvokeFuncrsp
92 Figure 40 – Offset calculation procedure of safety clock
95 12.8 Safety communication layer management for FSCP 8/2
12.8.1 Parameter Definitions
Table 41 – Parameters used by safety communication layer
96 Figure 41 – Relationship between transmissioninterval fluctuation and transmission_interval
98 Figure 42 – Calculation of allowable_refresh_interval
99 12.8.2 Parameter Setup
Figure 43 – Calculation of allowable_delay
100 12.8.3 Management Services
Table 42 – SMSetSafetyStationInfo
Table 43 – Safety station information setting parameters of SMSetSafetyStationInfo
101 Table 44 – SMSetSafetyNetworkParameter
Table 45 – Safety network parameters of SMSetSafetyNetworkParameter
Table 46 – SMGetSafetyStationInfo
102 Table 47 – Safety station information parameters of SMGetSafetyStationInfo (Request)
Table 48 – Safety station information parameters of SMGetSafetyStationInfo (Response)
Table 49 – SMGetSafetyNetworkParameter
Table 50 – Parameters of SMGetSafetyNetworkParameter request
103 12.9 System requirements for FSCP 8/2
12.9.1 Indicators and switches
Table 51 – Parameters of SMGetSafetyNetworkParameter response
104 Table 52 – Monitor LEDs
Table 53 – Communication port monitor LEDs
105 12.9.2 Installation guidelines
12.9.3 Safety function response time
Figure 44 – Calculation of response time between safety PLCs
106 12.9.4 Duration of demands
12.9.5 Constraints for calculation of system characteristics
107 12.9.6 Maintenance
12.9.7 Safety manual
Figure 45 – Constraints on NSE and m
108 12.10 Assessment for FSCP 8/2
109 Annex A (informative) Additional information for functional safety communication profiles of CPF 8
Table A.1 – Residual error probability for FSCP 8/1 CRC
110 Figure A.1 – Allowable_delay and offset calculation deviation
Table A.2 – Residual error probability for FSCP 8/2 CRC
112 Annex B (informative) Information for assessment of the functional safety communication profiles of CPF 8
113 Bibliography

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BS EN IEC 61784-3-8:2021
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