IEC 61850-8-1:2004

INTERNATIONAL IEC
STANDARD 61850-8-1
First edition
2004-05
Communication networks and systems
in substations –
Part 8-1:
Specific Communication Service Mapping (SCSM) –
Mappings to MMS (ISO 9506-1 and ISO 9506-2)
and to ISO/IEC 8802-3
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INTERNATIONAL IEC
STANDARD 61850-8-1
First edition
2004-05
Communication networks and systems
in substations –
Part 8-1:
Specific Communication Service Mapping (SCSM) –
Mappings to MMS (ISO 9506-1 and ISO 9506-2)
and to ISO/IEC 8802-3
 IEC 2004  Copyright - all rights reserved
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mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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– 2 – 61850-8-1  IEC:2004(E)
CONTENTS
FOREWORD.8
INTRODUCTION.10

1 Scope.11
2 Normative references .11
3 Terms and definitions .15
4 Abbreviations .17
5 Overview .18
5.1 General .18
5.2 IEC 61850 server object .20
5.3 MMS communication profiles .20
5.4 Non-MMS communication profiles .20
5.5 MMS objects being used .20
6 Communication stack .21
6.1 Overview of the protocol usage .21
6.2 Client/server services and communication profiles .22
6.3 GSE management and GOOSE services communication profiles.25
6.4 GSSE Service and communication profile.27
6.5 Time sync.29
7 Objects of IEC 61850 .30
7.1 Server .30
7.2 Logical device (LD) .30
7.3 Logical node (LN).30
8 Mapping of IEC 61850-7-2 and IEC 61850-7-3 data attributes .33
8.1 Mapping of Attributes specified in IEC 61850-7-2 .33
8.2 Mapping of quality common data attribute type specified in IEC 61850-7-3.36
9 Server class model.37
9.1 Server mapping .37
9.2 Server class attributes.37
9.3 Server class service GetServerDirectory .38
10 Association model .40
10.1 Association relation to communication profiles .40
10.2 Two party association model for client/server communication profile .40
10.3 Two party association model for GSE management communication profile .41
10.4 Two party association model for time sync .41
10.5 Multicast association model.42
11 Logical device model .42
12 Logical node model .42
12.1 Logical node class.42
12.2 Logical node class attributes .42
12.3 Logical node class cervices.43
13 Data class model.44
13.1 Data class .44
13.2 Data class services .45

61850-8-1 © IEC:2004(E) – 3 –
14 Data set class model .46
14.1 Data set class .46
14.2 Data set attributes .46
14.3 Data set services.47
15 Substitution model.50
16 Setting group control class model.50
16.1 Setting group control class definition .50
16.2 Setting group control class services .50
17 Reporting and logging class model .51
17.1 Report model.51
17.2 Reporting services .53
17.3 Log model .56
18 Mapping of the generic substation event model (GSE).62
18.1 Generic object oriented substation event (GOOSE) .62
18.2 Generic Substation State Event (GSSE) .71
19 Transmission of sampled values class model .81
20 Control class model.81
20.1 Control service parameters.81
20.2 Mapping of control objects.81
20.3 Mapping of control services.83
20.4 Select.84
20.5 SelectwithValue.84
20.6 Cancel.85
20.7 Operate.85
20.8 AdditionalCauseDiagnosis in negative control service responses .87
20.9 CommandTermination .89
21 Time and time synchronization model.89
22 Naming conventions .89
23 File transfer.89
23.1 File transfer model .89
23.2 File services .91
24 Conformance.94
24.1 Notation .94
24.2 PICS .94
24.3 PICS Statement.107
25 Substation Configuration Language (SCL) .109
25.1 SCL file and SCL extensions .109

Annex A (normative) Application protocol specification for GOOSE and GSE
management.111
Annex B (informative) Multicast address selection .113
Annex C (normative) Overview of ISO/IEC 8802-3 frame structure for GSE
management and GOOSE.114
Annex D (informative) SCL conformance .117
Annex E (normative) Specialized CDCs for control service mapping .121
Annex F (informative) Time scales and epochs .128
Annex G (normative) Type extensions to ISO 9506-1 (2003) and ISO 9506-2 (2003) .131

– 4 – 61850-8-1  IEC:2004(E)
Figure 1 – Overview of functionality and profiles .19
Figure 2 – OSI reference model and profiles .21
Figure 3 – Recommended ordered list of functional constraints.31
Figure 4 – Relationship of LCB attributes to IEC 61850-7-2 log definitions.56
Figure 5 – GetGoReference service primitives .63
Figure 6 – GetGOOSEElementNumber service primitives .66
Figure 7 – Transmission time for events .68
Figure 8 – SendGooseMessage message service primitives .68
Figure 9 – Client state machine for GOOSE service.69
Figure 10 – Server state machine for GOOSE service.69
Figure 11 – GetGsReference service primitives .74
Figure 12 – GetGSSEDataOffset service primitives.76
Figure 13 – GSSE service primitives.78
Figure 14 – Client state machine for GSSE service.78
Figure 15 – Server state machine for GSSE service.79
Figure 16 – Mapping of ACSI GetFile to MMS FileOpen, FileRead, FileClose .91
Figure 17 – Mapping of ACSI SetFile service .92
Figure C.1 – ISO/IEC 8802-3 frame format .114
Figure C.2 – Virtual LAN tag .115

Table 1 – MMS objects and services in use within this SCSM .21
Table 2 – Services requiring client/server Communication Profile .22
Table 3 – Service and protocols for client/server communication A-Profile .23
Table 4 – Service and protocols for client/server TCP/IP T-Profile .24
Table 5 – Service and protocols for client/server OSI T-Profile .25
Table 6 – Services requiring GSE Management and GOOSE communication profile .26
Table 7 – Service and protocols for GSE Management and GOOSE communication
A-Profile .26
Table 8 – GOOSE/GSE T-Profile .26
Table 9 – Service requiring GSSE communication profile.27
Table 10 – Service and protocols for GSSE communication A-Profile.27
Table 11 – GSSE management T-Profile.28
Table 12 – Time sync A-Profile .29
Table 13 – Time sync T-Profile .29
Table 14 – Mapping of ACSI data types .33
Table 15 – Encoding of IEC 61850-7-2 TimeQuality .36
Table 16 – Encoding of IEC 61850-7-3 quality .37
Table 17 – ServiceError mapping for GetServerDirectory for non-files .39
Table 18 – ServiceErrors mapping of ACSI GetServerDirectory for files.39
Table 19 – Association model versus communication profiles .40
Table 20 – Associate service error mappings.41
Table 21 – Release service error mappings .41
Table 22 – GetNamedList classes for GetLogicalNodeDirectory service.43

61850-8-1 © IEC:2004(E) – 5 –
Table 23 – MMS AccessResult mapping to ASCI ServiceError .44
Table 24 – Mapping of GetDataValues service parameters .45
Table 25 – Mapping of SetDataValues service parameters.45
Table 26 – Mapping of GetDataDirectory service parameters.46
Table 27 – ServiceError Mappings for GetDataDirectory service .46
Table 28 – Mapping of GetDataSetValues service parameters .47
Table 29 – Mapping of SetDataSetValues service parameters .47
Table 30 – Mapping of CreateDataSet service parameters.48
Table 31 – ServiceError mapping for CreateDataSet.48
Table 32 – Mapping of DeleteDataSet service parameters .48
Table 33 – ServiceError mapping for DeleteDataSet .49
Table 34 – Mapping of GetDataSetDirectory service parameters.49
Table 35 – ServiceError mapping for GetDataSetDirectory.49
Table 36 – Mapping of ACSI ServiceError for SelectActiveSG.50
Table 37 – Mapping of BRCB to MMS type definition .51
Table 38 – Mapping of OptFlds within Bitstring .52
Table 39 – Mapping of URCB to MMS type definition .52
Table 40 – Order of AccessResults for variableListName report.53
Table 41 – Definition of an MMS log control block.57
Table 42 – Mapping of values for LogEna .57
Table 43 – Mapping of ACSI LogEntries.58
Table 44 – General mappings of ACSI log model services .60
Table 45 – Mapping of QueryLogByTime request parameters .61
Table 46 – Mapping of response parameters .61
Table 47 – ServiceError mappings for Log services .61
Table 48 – Mapping of QueryLogAfter request parameters.61
Table 49 – Log conformance requirements .62
Table 50 – MMS TypeDescription definition for GCB MMS structure .62
Table 51 – DstAddress structure.63
Table 52 – Mapping of GetGoReference service .64
Table 53 – GetGoReference .64
Table 54 – Mapping of GetGOOSEElementNumber service .66
Table 55 – GetGOOSEElementNumber.67
Table 56 – GOOSE service parameter mapping.70
Table 57 – MMS TypeDescription Definition for GSSE control block MMS structure .71
Table 58 – Mapping of LSentData .72
Table 59 – Definition of integer values of PhsID.73
Table 60 – Definition of double-bit GSSE values .73
Table 61 – Mapping of GetGsReference service .74
Table 62 – GetGsReference.75
Table 63 – Mapping of GetGOOSEElementNumber service .76
Table 64 – GetGSSEDataOffset.77
Table 65 – GSSE service.79

– 6 – 61850-8-1  IEC:2004(E)
Table 66 – Mapping of test values to bit-pair values.80
Table 67 – Control service parameters.81
Table 68 – Mapping of IEC 61850-7-2 control model to MMS control components.82
Table 69 – Mapping of control services .83
Table 70 – Select service parameter mapping.84
Table 71 – SelectwithValue service parameter mapping.84
Table 72 – Select, Oper and Cancel AccessResult specification .85
Table 73 – Cancel service parameter mapping.85
Table 74 – Operate service parameter mapping.86
Table 75 – Control with TimeActivation service parameter mapping .86
Table 76 – Definition of LastApplError variable structure.87
Table 77 – Mapping of ACSI AddCause values .88
Table 78 – Mapping of ACSI file class to MMS file object.89
Table 79 – Reserved file suffixes .90
Table 80 – Mapping of ACSI GetFile service parameters .92
Table 81 – Mapping of ACSI SetFile parameters.93
Table 82 – Mapping of ACSI DeleteFile service .93
Table 83 – Mapping of ACSI GetFileAttributeValues parameters.94
Table 84 – Mapping of ACSI ListOfDirectoryEntry.94
Table 85 – PICS for A-Profile support .95
Table 86 – PICS for T-Profile support .95
Table 87 – MMS InitiateRequest general parameters .96
Table 88 – MMS InitiateResponse general parameters .96
Table 89 – MMS service supported conformance table .97
Table 90 – MMS Parameter CBB .100
Table 91 – GetNameList conformance statement .100
Table 92 – AlternateAccessSelection conformance statement.101
Table 93 – VariableAccessSpecification conformance statement .101
Table 94 – VariableSpecification conformance statement.102
Table 95 – Read conformance statement .102
Table 96 – Write conformance statement .102
Table 97 – InformationReport conformance statement .103
Table 98 – GetVariableAccessAttributes conformance statement.103
Table 99 – DefineNamedVariableList conformance statement.103
Table 100 –GetNamedVariableListAttributes conformance statement.104
Table 101 – DeleteNamedVariableList conformance statement .104
Table 102 – ReadJournal conformance statement.105
Table 103 – JournalEntry conformance statement.105
Table 104 – InitializeJournal conformance statement .106
Table 105 – FileDirectory conformance statement.106
Table 106 – FileOpen conformance statement .106
Table 107 – FileRead conformance statement .107
Table 108 – FileClose conformance statement.107

61850-8-1 © IEC:2004(E) – 7 –
Table 109 – GOOSE conformance statement.108
Table 110 – GSSE conformance statement.108
Table 111 – Allowed P-Type definitions for client/server addressing .109
Table 112 – Definitions for GSE SCL .110
Table B.1 – Recommended multicast addressing example .113
Table C.1 – Default virtual LAN IDs and priorities .115
Table C.2 – Assigned Ethertype values.116
Table D.1 – SCL conformance degrees.117
Table D.2 – Supported ACSI services for SCL.2 and SCL.3 .117
Table D.3 – Additional MMS services for SCL.2 and SCL.3.118
Table D.4 – Definition of SCL control block .118
Table E.1 – Name space attributes .121
Table E.2 – Extended common data class controllable single point.122
Table E.3 – Extended common data class controllable double point.122
Table E.4 – Extended common data class controllable integer status.123
Table E.5 – Extended common data class binary controlled step position information .123
Table E.6 – Extended common data class integer controlled step position information.124
Table E.7 – Extended common data class controllable analogue set point information.124
Table E.8 – SBOw .125
Table E.9 – Oper .125
Table E.10 – Cancel .126
Table E.11 – ctlVal .126
Table E.12 – Conditions for attribute inclusion .126
Table E.13 – Semantics of data attributes.127
Table F.1 – Relationships between timescales.129
Table F.2 – Examples of timescale correspondence.130

– 8 – 61850-8-1  IEC:2004(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND SYSTEMS IN SUBSTATIONS –

Part 8-1: Specific Communication Service Mapping (SCSM) –
Mappings to MMS (ISO 9506-1 and ISO 9506-2)
and to ISO/IEC 8802-3
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61850-8-1 has been prepared by IEC technical committee 57:
Power systems management and associated information exchange.
The text of this standard is based on the following documents:
FDIS Report on voting
57/692/FDIS 57/712/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

61850-8-1 © IEC:2004(E) – 9 –
IEC 61850 consists of the following parts, under the general title Communication networks
and systems in substations:
Part 1: Introduction and overview
Part 2: Glossary
Part 3: General requirements
Part 4: System and project management

Part 5: Communication requirements for functions and device models
Part 6: Configuration description language for communication in electrical substations
related to IEDs
Part 7-1: Basic communication structure for substation and feeder equipment – Principles
and models
Part 7-2: Basic communication structure for substation and feeder equipment – Abstract

communication service interface (ACSI)
Part 7-3: Basic communication structure for substation and feeder equipment – Common
data classes
Part 7-4: Basic communication structure for substation and feeder equipment – Compatible
logical node classes and data classes
Part 8-1: Specific Communication Service Mapping (SCSM) – Mappings to MMS (ISO 9506-1
and ISO 9506-2) and to ISO/IEC 8802-3
Part 9-1: Specific Communication Service Mapping (SCSM) – Sampled values over serial
unidirectional multidrop point to point link
Part 9-2: Specific Communication Service Mapping (SCSM) – Sampled values over
ISO/IEC 8802-3
Part 10: Conformance testing
This document specifies in Annex E specialized CDCs (Common Data Classes) based on
CDCs defined in IEC 61850-7-3:2003.
The committee has decided that the contents of this publication will remain unchanged until
2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this document may be issued at a later date.
———————
Under consideration.
– 10 – 61850-8-1  IEC:2004(E)
INTRODUCTION
This document is part of a set of specifications which details layered substation communi-
cation architecture.
This part of IEC 61850 is intended to provide inter-device operation of a variety of substation
and feeder devices to achieve interoperability providing detailed information on how to create
and exchange concrete communication messages that implement abstract services and
models specified in IEC 61850-7-4, IEC 61850-7-3, and IEC 61850-7-2.
The mapping allows for data exchange over ISO/IEC 8802-3 Local Area Networks between all
kinds of substation devices. Some of the protocol stacks used within this document are
routable. Therefore the actual communications path may not be restricted to the LAN. Data
exchange consists of real-time monitoring and control data, including measured values, to
name just a few.
NOTE This part of IEC 61850 does not provide tutorial material. It is recommended that IEC 61850-5 and
IEC 61850-7-1 be read in conjunction with IEC 61850-7-2.

61850-8-1 © IEC:2004(E) – 11 –
COMMUNICATION NETWORKS AND SYSTEMS IN SUBSTATIONS –

Part 8-1: Specific Communication Service Mapping (SCSM) –
Mappings to MMS (ISO 9506-1 and ISO 9506-2)
and to ISO/IEC 8802-3
1 Scope
This part of IEC 61850 specifies a method of exchanging time-critical and non-time-critical
data through local-area networks by mapping ACSI to MMS and ISO/IEC 8802-3 frames.
MMS services and protocol are specified to operate over full OSI and TCP compliant
communications profiles. The use of MMS allows provisions for supporting both centralized
and distributed architectures. This standard includes the exchange of real-time data
indications, control operations, report notification.
This part of IEC 61850 specifies the mapping of the objects and services of the ACSI
(Abstract Communication Service Interface, IEC 61850-7-2) to MMS (Manufacturing Message
Specification, ISO 9506) and ISO/IEC 8802-3 frames.
This standard also specifies the mapping of time-critical information exchanges to non-MMS
protocol. The protocol semantics are defined in IEC 61850-7-2. This standard contains the
protocol syntax, definition, mapping to ISO/IEC 8802-3 frame formats, and any relevant
procedures specific to the use of ISO/IEC 8802-3.
This mapping of ACSI to MMS defines how the concepts, objects, and services of the ACSI
are to be implemented using MMS concepts, objects, and services. This mapping allows
interoperability across functions implemented by different manufacturers.
This part of the standard defines a standardized method of using the ISO 9506 services to
implement the exchange of data. For those ACSI services, defined in IEC 61850-7-2 that are
not mapped to MMS, this part defines additional protocols. This standard describes real
substation devices with respect to their external visible data and behaviour using an object
oriented approach. The objects are abstract in nature and may be used to a wide variety of
applications. The use of this mapping goes far beyond the application in the substation
communications.
This part of IEC 61850 provides mappings for the services and objects specified within
IEC 61850-7-2, IEC 61850-7-3, and IEC 61850-7-4.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 60874-10-1:1997, Connectors for optical fibres and cables – Part 10-1: Detail
specification for fibre optic connector type BFOC/2,5 terminated to multimode fibre type A1
IEC 60874-10-2:1997, Connectors for optical fibres and cables – Part 10-2: Detail
specification for fibre optic connector type BFOC/2,5 terminated to single-mode fibre type B1

– 12 – 61850-8-1  IEC:2004(E)
IEC 60874-10-3:1997, Connectors for optical fibres and cables – Part 10-3: Detail
specification for fibre optic connector type BFOC/2,5 for single and multimode fibre
IEC 61850-2, Communication networks and systems in substations – Part 2: Glossary
IEC 61850-5, Communication networks and systems in substations – Part 5: Communication
requirements for functions and device models
IEC 61850-7-1, Communication networks and systems in substations – Part 7-1: Basic
communication structure for substation and feeder equipment – Part 7-1: Principles and
models
IEC 61850-7-2, Communication networks and systems in substations – Part 7-2: Basic
communication structure for substation and feeder equipment – Abstract communication
service interface (ACSI)
IEC 61850-7-3, Communication networks and systems in substations – Part 7-3: Basic
communication structure for substation and feeder equipment – Common data classes
IEC 61850-7-4, Communication networks and systems in substations – Part 7-4: Basic
communication structure for substation and feeder equipment – Compatible logical node
classes and data classes
IEC 61850-9-1, Communication networks and systems in substations – Part 9-1: Specific
SCSM) – Sampled values over serial unidirectional
Communication Service Mapping (
multidrop point to point link
IEC 61850-9-2, Communication networks and systems in substations – Part 9-2: Specific
Communication Service Mapping (SCSM) – Sampled values over ISO/IEC 8802-3
ISO/IEC 7498-1:1994, Information technology – Open Systems Interconnection – Basic
Reference Model: The Basic Model
ISO/IEC 7498-3:1997, Information technology – Open Systems Interconnection – Basic
Reference Model: Naming and addressing
ISO/IEC 8072:1996, Information technology – Open systems interconnection – Transport
service
ISO/IEC 8073:1997, Information technology – Open Systems Interconnection – Protocol for
providing the connection-mode transport service definition
ISO/IEC 8326:1996, Information processing system – Open Systems Interconnection –
Session service definition
ISO/IEC 8327-1:1997, Information technology – Open Systems Interconnection – Connection-
oriented session protocols: Protocol specification
ISO/IEC 8348:2002, Information technology – Open Systems Interconnection – Network
service definition
ISO/IEC 8473-1:1998, Information technology – Protocol for providing the connectionless-
mode network service: Protocol specification

61850-8-1 © IEC:2004(E) – 13 –
ISO/IEC 8473-2:1996, Information technology – Protocol for providing the connectionless-
mode network service – Part 2: Provision of the underlying service by an ISO/IEC 8802
subnetwork
ISO/IEC 8602:1995, Information technology – Protocol for providing the OSI connectionless-
mode transport service
ISO/IEC 8649:1996, Information technology – Open Systems Interconnection – Service
definition for the Associated Control Service Element
ISO/IEC 8650-1:1996, Information technology – Open Systems Interconnection – Connection-
oriented protocol for the Association Control Service
...