IEC 61784-3-13:2021

IEC 61784-3-13 ®
Edition 3.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –
Part 3-13: Functional safety fieldbuses – Additional specifications for CPF 13

Réseaux de communication industriels – Profils –
Partie 3-13: Bus de terrain de sécurité fonctionnelle – Spécifications
supplémentaires pour CPF 13
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IEC 61784-3-13 ®
Edition 3.0 2021-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – Profiles –

Part 3-13: Functional safety fieldbuses – Additional specifications for CPF 13

Réseaux de communication industriels – Profils –

Partie 3-13: Bus de terrain de sécurité fonctionnelle – Spécifications

supplémentaires pour CPF 13
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-9759-9

– 2 – IEC 61784-3-13:2021  IEC 2021
CONTENTS
FOREWORD . 14
0 Introduction . 16
0.1 General . 16
0.2 Patent declaration . 18
1 Scope . 19
2 Normative references . 19
3 Terms, definitions, symbols, abbreviated terms and conventions . 20
3.1 Terms and definitions . 20
3.1.1 Common terms and definitions . 20
3.1.2 CPF 13: Additional terms and definitions . 25
3.2 Symbols and abbreviated terms . 27
3.2.1 Common symbols and abbreviated terms . 27
3.2.2 CPF 13: Additional symbols and abbreviated terms . 27
3.3 Conventions . 28
3.3.1 Hexadecimal values . 28
3.3.2 Binary values . 28
3.3.3 Wildcard digits . 28
3.3.4 Diagrams . 29
4 Overview of FSCP 13/1 (openSAFETY™) . 29
4.1 Functional Safety Communication Profile 13/1 . 29
4.2 Technical overview . 29
5 General . 30
5.1 External documents providing specifications for the profile . 30
5.2 Safety functional requirements . 30
5.3 Safety measures . 31
5.4 Safety communication layer structure . 32
5.5 Relationships with FAL (and DLL, PhL) . 34
5.5.1 General . 34
5.5.2 Data types . 34
6 Safety communication layer services . 34
6.1 Modelling . 34
6.1.1 Reference model . 34
6.1.2 Communication model . 35
6.1.3 Device roles and topology . 36
6.2 Life cycle model . 40
6.2.1 General . 40
6.2.2 Concept, planning and implementation . 40
6.2.3 Commissioning . 41
6.2.4 Operation terms . 43
6.2.5 Maintenance terms . 44
6.3 Non safety communication layer . 44
6.3.1 General . 44
6.3.2 Requirements for data transport . 44
6.3.3 Domain protection and separation . 48
7 Safety communication layer protocol . 48

7.1 Safety PDU format . 48
7.1.1 Structure of Safety PDUs . 48
7.1.2 Address field (ADR) . 53
7.1.3 PDU identification field (ID) . 53
7.1.4 Length field (LE) . 55
7.1.5 Consecutive Time field (CT) . 55
7.1.6 Payload data field (DB0 to DBn) . 55
7.1.7 Cyclic Redundancy Check field (CRC-8 / CRC-16). 55
7.1.8 Time Request Address field (TADR) . 56
7.1.9 Time Request Distinctive Number field (TR) . 56
7.1.10 UDID of SCM coding (UDID of SCM) . 56
7.2 Safety Process Data Object (SPDO) . 57
7.2.1 General . 57
7.2.2 SPDO telegram types . 57
7.2.3 Data Only telegram . 57
7.2.4 Data with Time Request telegram . 58
7.2.5 Data with Time Response telegram . 59
7.3 Safety Service Data Object (SSDO) . 60
7.3.1 General . 60
7.3.2 SSDO telegram types . 60
7.3.3 SSDO services and protocols . 61
7.3.4 SSDO Download Initiate . 62
7.3.5 SSDO Download Segment . 64
7.3.6 SSDO Download Initiate with Preload . 64
7.3.7 SSDO Download Segment with Preload . 66
7.3.8 SSDO Upload Initiate . 67
7.3.9 SSDO Upload Segment . 68
7.3.10 SSDO Upload Initiate with Preload . 69
7.3.11 SSDO Upload Segment with Preload . 70
7.3.12 SSDO Abort . 71
7.3.13 SSDO Preload . 73
7.4 Safety Network Management (SNMT) . 74
7.4.1 General . 74
7.4.2 SNMT telegram types . 74
7.4.3 SNMT services and protocols . 75
7.5 Safety Object dictionary (SOD) . 89
7.5.1 General . 89
7.5.2 Object dictionary entry definition . 89
7.5.3 Data type entry specification . 94
7.5.4 Object description . 96
7.6 Safety related PDO mapping . 141
7.6.1 General . 141
7.6.2 Transmit SPDOs . 142
7.6.3 Receive SPDOs . 142
7.6.4 SPDO mapping parameter . 142
7.6.5 SPDO mapping example . 143
7.6.6 SDPO Feature Set . 145
7.6.7 SPDO error handling . 146
7.7 State and sequence diagrams . 146

– 4 – IEC 61784-3-13:2021  IEC 2021
7.7.1 Safety Process Data Object (SPDO) . 146
7.7.2 Time synchronization and validation . 150
7.7.3 Safety Service Data Object (SSDO) . 160
7.7.4 SOD access . 162
7.7.5 Safety Network Management Object (SNMT) . 171
7.7.6 SN power up . 173
7.7.7 SN power down . 180
7.7.8 SN recovery after Restart / Error . 180
7.7.9 SCM power up . 180
7.7.10 Address verification . 183
7.7.11 Commissioning mode. 185
7.7.12 Handle single UDID mismatch . 185
7.7.13 Activate SN . 189
7.7.14 Device exchange . 190
8 Safety communication layer management . 190
8.1 General . 190
8.2 Configuration of a Safety Domain . 191
8.3 Parameter check mechanism . 191
9 System requirements . 191
9.1 Indicators and switches . 191
9.2 Installation guidelines . 192
9.3 Safety function response time . 192
9.4 Duration of demands . 193
9.5 Constraints for calculation of system characteristics . 193
9.5.1 General . 193
9.5.2 Number of sinks limit . 193
9.5.3 Message rate limit . 193
9.5.4 Message payload limit . 193
9.5.5 Bit error rate considerations . 194
9.5.6 Residual error rate . 194
9.6 Maintenance . 195
9.6.1 Diagnostic information . 195
9.6.2 Replacement of safety related devices . 195
9.6.3 Modification . 196
9.6.4 Machine part changing. 196
9.6.5 Firmware update of safety related nodes . 196
9.6.6 Machine check due to service interval . 196
9.7 Safety manual . 196
10 Assessment . 196
10.1 General . 196
10.2 CP 13/1 assessment . 197
10.3 FSCP 13/1 conformance test . 197
10.4 Approval of functional safety by competent assessment body . 197
Annex A (informative) Additional information for functional safety communication
profiles of CPF 13 . 198
A.1 Hash function calculation . 198
A.2 Void . 201
Annex B (informative) Information for assessment of the functional safety
communication profiles of CPF 13 . 202

Bibliography . 203

Figure 1 – Relationships of IEC 61784-3 with other standards (machinery) . 16
Figure 2 – Relationships of IEC 61784-3 with other standards (process) . 17
Figure 3 – Producer consumer example . 30
Figure 4 – Client server example . 30
Figure 5 – Communication layer structure . 33
Figure 6 – Safety communication channel . 34
Figure 7 – Characteristic producer / consumer communication . 35
Figure 8 – Extended producer / consumer communication . 36
Figure 9 – Client Server communication . 36
Figure 10 – Topology overview . 37
Figure 11 – Safety Domain protection (example) . 38
Figure 12 – Safety Domain separation (example) . 39
Figure 13 – Data flow example . 43
Figure 14 – Communication model . 45
Figure 15 – SPDO transport . 46
Figure 16 – SSDO transport . 47
Figure 17 – Diagnostic data representation . 48
Figure 18 – Safety PDUs inside a CP 13/1 PDU . 49
Figure 19 – Basic Safety PDU for n = 0 – 8 octet payload data . 49
Figure 20 – Basic Safety PDU from 9 octet payload data . 49
Figure 21 – Slim Safety PDU for n = 0 – 8 octet payload data . 50
Figure 22 – Slim Safety PDU from 9 octet payload data . 51
Figure 23 – Safety PDU with 40 bit counter for n = 0 – 8 octet payload data . 52
Figure 24 – Safety PDU with 40 bit counter from 9 octet payload data . 52
Figure 25 – SPDO_Data_Only telegram . 58
Figure 26 – SPDO_Data_with_Time_Request telegram . 58
Figure 27 – SPDO_Data_with_Time_Response telegram . 59
Figure 28 – SSDO download protocols . 62
Figure 29 – SSDO upload protocols . 62
Figure 30 – SSDO Download Initiate protocol . 63
Figure 31 – SSDO Download Segment protocol . 64
Figure 32 – SSDO Download Initiate protocol with Preload . 65
Figure 33 – SSDO Download Segment protocol with Preload . 66
Figure 34 – SSDO Upload Initiate protocol . 67
Figure 35 – SSDO Upload Segment protocol . 68
Figure 36 – SSDO Upload Initiate protocol with Preload . 69
Figure 37 – SSDO Upload Segment protocol with Preload . 71
Figure 38 – SSDO Abort protocol . 72
Figure 39 – UDID Request / Response protocol . 75
Figure 40 – SADR Assignment protocol . 76
Figure 41 – Reset Node Guarding Time protocol . 77

– 6 – IEC 61784-3-13:2021  IEC 2021
Figure 42 – SN set to Pre-Operational protocol . 79
Figure 43 – SN set to Operational protocol . 80
Figure 44 – SN Acknowledge protocol. 82
Figure 45 – SN set to stop protocol . 83
Figure 46 – SCM set to Operational protocol . 83
Figure 47 – Node Guarding protocol . 84
Figure 48 – Additional SADR Assignment protocol . 85
Figure 49 – UDID of SCM Assignment protocol . 87
Figure 50 – Init CT value assignment protocol . 88
Figure 51 – SPDO mapping example . 143
Figure 52 – State diagram TxSPDO . 146
Figure 53 – SPDO communication producer . 147
Figure 54 – State diagram RxSPDO . 148
Figure 55 – SPDO communication consumer . 148
Figure 56 – State diagram process data . 149
Figure 57 – Time synchronization and validation . 150
Figure 58 – Time synchronization detail . 151
Figure 59 – Calculation of propagation delay . 153
Figure 60 – Time validation, propagation delay explanation limits . 153
Figure 61 – Time synchronization on a nonsafe network . 155
Figure 62 – Explanation of time synchronization . 155
Figure 63 – Time synchronization failure . 156
Figure 64 – State diagram time synchronization producer . 157
Figure 65 – State diagram time synchronization consumer . 158
Figure 66 – State diagram SSDO client . 160
Figure 67 – State diagram SSDO server . 161
Figure 68 – Expedited SOD access . 162
Figure 69 – State diagram segmented SOD download access client . 163
Figure 70 – Segmented SOD download access . 164
Figure 71 – State diagram segmented SOD download access server . 165
Figure 72 – State diagram SOD preload download access client . 167
Figure 73 – SOD preload download access . 168
Figure 74 – State diagram SOD preload download access server . 170
Figure 75 – State diagram SNMT master . 172
Figure 76 – State diagram SNMT slave . 173
Figure 77 – State diagram SN power up . 174
Figure 78 – State diagram SN Pre-Operational . 176
Figure 79 – State diagram SN additional paramters . 178
Figure 80 – State diagram SN Operational . 179
Figure 81 – Life Guarding telegram . 180
Figure 82 – State diagram SCM power up . 181
Figure 83 – State diagram SCM Operational . 182
Figure 84 – State diagram SCM address verification . 184

Figure 85 – State diagram SCM handle single UDID mismatch . 186
Figure 86 – State diagram SCM verify parameters . 188
Figure 87 – State diagram activate SN . 190
Figure 88 – Safety function response time . 192
Figure 89 – Assessment flow of devices . 197

Table 1 – Communication errors and detection measures (cyclic) . 31
Table 2 – Communication errors and detection measures (acyclic) . 32
Table 3 – Device roles . 37
Table 4 – Basic Safety PDU format . 50
Table 5 – Slim Safety PDU format . 51
Table 6 – Safety PDU with 40 bit counter . 53
Table 7 – PDU identification field (ID) . 54
Table 8 – Used ID field combinations . 54
Table 9 – Request / response identification . 54
Table 10 – Type of CRC depending on LE . 55
Table 11 – CRC polynoms for SPDUs . 56
Table 12 – SPDO telegram types (ID field, bits 2, 3 and 4) . 57
Table 13 – Fields of SPDO_Data_Only telegram . 58
Table 14 – Fields of SPDO_Data_with_Time_Request telegram . 59
Table 15 – Fields of SPDO_Data_with_Time_Response telegram . 59
Table 16 – SSDO telegram types (ID field, bits 2, 3 and 4) . 60
Table 17 – SOD Access Command (SACmd) – bit coding . 61
Table 18 – Fields of Download Initiate SSDO_Service_Request telegram . 63
Table 19 – Fields of Download Initiate SSDO_Service_Response telegram . 63
Table 20 – Fields of Download Segment SSDO_Service_Request telegram . 64
Table 21 – Fields of Download Segment SSDO_Service_Response telegram . 64
Table 22 – Fields of Download Initiate SSDO_Service_Request telegram with Preload . 65
Table 23 – Fields of Download Initiate SSDO_Service_Response telegram with Preload . 65
Table 24 – Fields of Download Segment SSDO_Service_Request telegram with Preload . 66
Table 25 – Fields of Download Segment SSDO_Service_Response telegram with Preload . 67
Table 26 – Fields of Upload Initiate SSDO_Service_Request telegram . 67
Table 27 – Fields of Upload Initiate SSDO_Service_Response telegram . 68
Table 28 – Fields of Upload Segment SSDO_Service_Request telegram . 69
Table 29 – Fields of Upload Segment SSDO_Service_Response telegram . 69
Table 30 – Fields of Upload Initiate SSDO_Service_Request telegram with Preload . 70
Table 31 – Fields of Upload Initiate SSDO_Service_Response telegram with Preload . 70
Table 32 – Fields of Upload Segment SSDO_Service_Request telegram with PreLoad . 71
Table 33 – Fields of Upload Segment SSDO_Service_Response telegram with Preload . 71
Table 34 – Fields of SSDO Abort telegram . 72
Table 35 – SSDO Abort codes . 72
Table 36 – TR field usage for SSDO Preload . 73
Table 37 – Bit fields inside TR field for SSDO Preload . 74

– 8 – IEC 61784-3-13:2021  IEC 2021
Table 38 – SNMT telegram types (ID field, bits 2, 3 and 4) . 74
Table 39 – Fields of SNMT_Request_UDID telegram . 75
Table 40 – Fields of SNMT_Response_UDID telegram . 76
Table 41 – Fields of SNMT_Assign_SADR telegram . 77
Table 42 – Fields of SNMT_SADR_ Assigned telegram. 77
Table 43 – Fields of SNMT_SN_reset_guarding_SCM telegram . 78
Table 44 – SNMT request telegram types . 78
Table 45 – SNMT response telegram types . 78
Table 46 – Fields of SNMT_SN_set_to_PRE_OP telegram . 79
Table 47 – Fields of SNMT_SN_status_PRE_OP telegram . 79
Table 48 – Fields of SNMT_SN_set_to_OP telegram . 80
Table 49 – Fields of SNMT_SN_status_OP telegram . 80
Table 50 – Fields of SNMT_SN_busy telegram . 81
Table 51 – Fields of SNMT_SN_FAIL telegram . 81
Table 52 – SNMT_SN_FAIL Error Group values . 81
Table 53 – SNMT_SN_FAIL Error Code values . 81
Table 54 – SNMT_SN_FAIL Error Code values in case of Error Group Code 5 . 82
Table 55 – Fields of SNMT_SN_ACK telegram . 82
Table 56 – Fields of SNMT_SCM_set_to_STOP telegram . 83
Table 57 – Fields of SNMT_SCM_set_to_OP telegram . 84
Table 58 – Fields of SNMT_SCM_guard_SN telegram . 84
Table 59 – Fields of SNMT_SN_status_OP/SNMT_SN_status_OP telegrams . 85
Table 60 – Fields of SNMT_assign_additional_SADR telegram . 86
Table 61 – Fields of SNMT_assigned_additional_SADR telegram . 86
Table 62 – Fields of SNMT_assign_UDID_of_SCM telegram . 87
Table 63 – Fields of SNMT_assigned_UDID_of_SCM telegram . 87
Table 64 – Fields of SNMT_assign_Init_CT telegram . 88
Table 65 – Fields of SNMT_assigned_Init_CT telegram . 88
Table 66 – Object type definition . 89
Table 67 – Access attributes for data objects . 91
Table 68 – SPDO mapping attributes for data objects . 91
Table 69 – Basic data type object definition example . 91
Table 70 – Compound data type object definition example . 92
Table 71 – Sub index interpretation . 92
Table 72 – NumberOfEntries sub index specification . 93
Table 73 – RECORD type object sub index specification . 93
Table 74 – ARRAY type object sub index specification . 94
Table 75 – StructureOfObject encoding . 94
Table 76 – Object dictionary data types . 95
Table 77 – 0021h Compound data type description example . 96
Table 78 – 0021h Compound sub index descriptions example . 96
Table 79 – Standard objects . 97
Table 80 – Common communication objects . 97

Table 81 – Receive SPDO communication objects . 97
Table 82 – Receive SPDO mapping objects . 98
Table 83 – Transmit SPDO communication objects . 98
Table 84 – User parameter (writeable at any time) . 98
Table 85 – Transmit SPDO mapping objects . 98
Table 86 – SADR DVI list . 99
Table 87 – Additional SADR list . 99
Table 88 – SADR UDID list . 99
Table 89 – Additional parameter list . 99
Table 90 – Object 1001h Error Register . 100
Table 91 – Object 1001h Error Register value interpretation . 100
Table 92 – Object 1002h Manufacturer status register . 100
Table 93 – Object 1003h Pre defined error field . 101
Table 94 – Object 1003h sub index 00h . 101
Table 95 – Object 1003h sub index 01h .
...