IEC 61400-25-4:2008

IEC 61400-25-4
Edition 1.0 2008-08
INTERNATIONAL
STANDARD
Wind turbines –
Part 25-4: Communications for monitoring and control of wind power plants –
Mapping to communication profile

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IEC 61400-25-4
Edition 1.0 2008-08
INTERNATIONAL
STANDARD
Wind turbines –
Part 25-4: Communications for monitoring and control of wind power plants –
Mapping to communication profile

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XH
ICS 27.180 ISBN 2-8318-9964-8
– 2 – 61400-25-4 © IEC:2008(E)
CONTENTS
FOREWORD.8
INTRODUCTION.10
1 Scope.11
2 Normative references .12
3 Terms and definitions .13
4 Abbreviated terms .17
5 General overview .18
Annex A (normative) Specific communication service mapping – Definition and
mapping to Web Services .21
Annex B (normative) Specific communication service mapping – Mapping to OPC
XML-DA .127
Annex C (normative) Specific communication service mapping – Mapping to ISO 9506
specified in IEC 61850-8-1.175
Annex D (normative) Specific communication service mapping – Mapping to IEC
60870-5-104 specified in IEC/TS 61850-80-1.185
Annex E (normative) Specific communication service mapping – Mapping to DNP3 . 213
Annex F (normative) Time synchronization .236
Annex G (informative) Interfaces – Implementation considerations . 237

Figure 1 – Conceptual communication model of IEC 61400-25 series .12
Figure 2 – Communication profiles.19
Figure A.1 – Mapping architecture (conceptual) .22
Figure A.2 – Naming structure applied in the IEC 61400-25 series (conceptual).27
Figure A.3 – Client behavior in the reporting service (conceptual).56
Figure A.4 – Server behavior in the reporting service (conceptual).57
Figure A.5 – Reporting Services mechanism (conceptual).58
Figure B.1 – Mapping architecture (conceptual) .128
Figure B.2 – Differences between OPC XML-DA and IEC Information Model timestamp . 136
Figure B.3 – Sequence of services to establish an association . 141
Figure B.4 – CreateDataSet sequence of services .157
Figure C.1 – Mapping architecture (conceptual). 176
Figure D.1 – Mapping architecture (conceptual). 187
Figure D.2 – Direct Control with Normal Security with status update – positive case. 202
Figure D.3 – Direct Control with Normal Security in general – negative case a) . 202
Figure D.4 – Direct Control with Normal Security in general – negative case b) . 203
Figure D.5 – Direct Control with Normal Security with status update – negative case c). 204
Figure D.6 – Direct Control with Normal Security without status update – positive case . 204
Figure D.7 – Direct Control with Enhanced Security – positive case.205
Figure D.8 – Direct Control with Enhanced Security – negative case c) .206
Figure D.9 – Direct Control with Enhanced Security – negative case d) .206
Figure D.10 – SBOw control – positive case .207
Figure D.11 – SBOw control – negative case a) .208

61400-25-4 © IEC:2008(E) – 3 –
Figure D.12 – SBOw control – negative case b) .208
Figure D.13 – SBOw control – negative case c) .209
Figure D.14 – SBO with Enhanced Security – positive case .210
Figure D.15 – SBO with Enhanced Security – negative case a).210
Figure D.16 – SBO with Enhanced Security – negative case b).211
Figure E.1 – Mapping architecture (conceptual) .214
Figure G.1 – Implementation issues (example) . 238

Table 1 – Mapping overview of IEC 61400-25-3 services .20
Table A.1 – Web Services mapping overview of IEC 61400-25 IM and IEM.22
Table A.2 – Mapping the IEC 61400-25 IM to Web Services .25
Table A.3 – Mapping of IEC 61400-25 data attribute basic types .26
Table A.4 – XML schema for wind power information model.29
Table A.5 – Server class services mapped to Web Services .34
Table A.6 – GetServerDirectoryRequest .35
Table A.7 – GetServerDirectoryResponse.35
Table A.8 – AssociateRequest .37
Table A.9 – AssociateResponse .38
Table A.10 – ReleaseRequest .39
Table A.11 – ReleaseResponse.39
Table A.12 – AbortRequest.40
Table A.13 – AbortResponse .40
Table A.14 – LOGICAL-DEVICE service mapping .41
Table A.15 – GetLogicalDeviceDirectoryRequest .41
Table A.16 – GetLogicalDeviceDirectoryResponse .42
Table A.17 – LOGICAL-NODE mapping .42
Table A.18 – GetLogicalNodeDirectoryRequest .43
Table A.19 – GetLogicalNodeDirectoryResponse.43
Table A.20 – Data mapping .44
Table A.21 – GetDataValuesRequest.44
Table A.22 – GetDataValuesResponse .45
Table A.23 – SetDataValuesRequest .45
Table A.24 – SetDataValuesResponse .46
Table A.25 – GetDataDirectoryRequest .47
Table A.26 – GetDataDirectoryResponse.47
Table A.27 – GetDataDefinitionRequest.48
Table A.28 – GetDataDefinitionResponse .49
Table A.29 – DATA-SET mapping.49
Table A.30 – GetDataSetValuesRequest .50
Table A.31 – GetDataSetValuesResponse.50
Table A.32 – SetDataSetValuesRequest.51
Table A.33 – SetDataSetValuesResponse .51
Table A.34 – CreateDataSetRequest .52

– 4 – 61400-25-4 © IEC:2008(E)
Table A.35 – CreateDataSetResponse.52
Table A.36 – DeleteDataSetRequest.53
Table A.37 – DeleteDataSetResponse .54
Table A.38 – GetDataSetDirectoryRequest .54
Table A.39 – GetDataSetDirectoryResponse .55
Table A.40 – Report control block services mapping.55
Table A.41 – AddSubscriptionRequest.59
Table A.42 – AddSubscriptionResponse .60
Table A.43 – RemoveSubscriptionRequest .61
Table A.44 – RemoveSubscriptionResponse.61
Table A.45 – ReportFormat.62
Table A.46 – GetBRCBValuesRequest.63
Table A.47 – GetBRCBValuesResponse .64
Table A.48 – SetBRCBValuesRequest .66
Table A.49 – SetBRCBValuesResponse .67
Table A.50 – GetURCBValuesRequest .68
Table A.51 – GetURCBValuesResponse.68
Table A.52 – SetURCBValuesRequest.70
Table A.53 – SetURCBValuesResponse .71
Table A.54 – ReportRequest.71
Table A.55 – ReportResponse .72
Table A.56 – LOG-CONTROL-BLOCK services mapping .73
Table A.57 – GetLCBValuesRequest .73
Table A.58 – GetLCBValuesResponse.74
Table A.59 – SetLCBValuesRequest.75
Table A.60 – SetLCBValuesResponse .75
Table A.61 – Log class services mapping .76
Table A.62 – GetLogStatusValuesRequest .76
Table A.63 – GetLogStatusValuesResponse.77
Table A.64 – QueryLogByTimeRequest .78
Table A.65 – QueryLogByTimeResponse.79
Table A.66 – QueryLogAfterRequest.79
Table A.67 – QueryLogAfterResponse .80
Table A.68 – Control class services mapping.81
Table A.69 – SelectRequest .81
Table A.70 – SelectResponse.82
Table A.71 – SelectWithValueRequest.83
Table A.72 – SelectWithValueResponse .83
Table A.73 – CancelRequest .85
Table A.74 – CancelResponse.85
Table A.75 – OperateRequest.87
Table A.76 – OperateResponse .87
Table A.77 – CommandTerminationRequest .89

61400-25-4 © IEC:2008(E) – 5 –
Table A.78 – CommandTerminationResponse .89
Table A.79 – TimeActivatedOperateRequest.91
Table A.80 – TimeActivatedOperateResponse .91
Table A.81 – Protocol stack selections .93
Table B.1 – Mapping of IEC 61400-25-3 IEM service into OPC XML-DA services .128
Table B.2 – Mapping of IEC 61400-25-2 IM classes to OPC XML-DA. 130
Table B.3 – Server class attributes .131
Table B.4 – Logical Device Class attributes .132
Table B.5 – Logical Node Class attributes .132
Table B.6 – Data Class attributes .133
Table B.7 – DataAttributeType (DAType) Class attributes .133
Table B.8 – Mapping of the attribute BasicType . 134
Table B.9 – New OPC XML-DA Error codes.135
Table B.10 – Timestamp mapping.136
Table B.11 – Mapping of the Quality attribute .136
Table B.12 – Cookie parameter explanation.140
Table B.13 – IEM GetServerDirectory mapping.142
Table B.14 – IEM GetServerDirectory mapping detailed.143
Table B.15 – IEM GetLogicalDeviceDirectory mapping .144
Table B.16 – IEM GetLogicalDeviceDirectory mapping detailed . 144
Table B.17 – GetLogicalDeviceDirectory negative response mapping to IEM
ServiceError .145
Table B.18 – IEM GetLogicalNodeDirectory mapping . 146
Table B.19 – IEM GetLogicalNodeDirectory mapping detailed.146
Table B.20 – GetLogicalNodeDirectory negative response mapping to IEM
ServiceError .147
Table B.21 – IEM GetDataValues mapping .148
Table B.22 – IEM GetDataValues mapping detailed . 149
Table B.23 – GetDataValues negative response mapping to IEM ServiceError.150
Table B.25 – IEM SetDataValues mapping detailed .151
Table B.26 – SetDataValues negative response mapping to IEM ServiceError.153
Table B.27 – IEM GetDataDirectory mapping.153
Table B.28 – IEM GetDataDirectory mapping detailed. 154
Table B.29 – GetDataDirectory negative response mapping to IEM ServiceError . 155
Table B.30 – Mapping of CreateDataSet service parameters . 157
Table B.31 – CreateDataSet negative response mapping to IEM ServiceError . 157
Table B.32 – GetDataSetValues negative response mapping to IEM ServiceError . 158
Table B.33 – SetDataSetValues negative response mapping to IEM ServiceError. 158
Table B.34 – OPC Subscription attributes’ constrained value. 159
Table B.35 – AddSubscription service parameter constraints . 160
Table B.36 – Mapping of AddSubscription service parameters . 160
Table B.37 – AddSubscription negative response mapping to IEM ServiceError. 162
Table B.38 – Mapping of RemoveSubscription service parameters . 162
Table B.39 – Fault mapping to IEM ServiceError. 163

– 6 – 61400-25-4 © IEC:2008(E)
Table B.40 – Report service parameters .163
Table B.41 – Mapping of Report service parameters. 163
Table B.42 – Control models supported in this mapping. 164
Table B.43 – Control services supported .164
Table B.44 – Control model writable custom item properties . 165
Table B.45 – AddCause mapping to OPC Error Code .166
Table B.46 – Select request service mapping .167
Table B.47 – SelectWithValue service parameter mapping .167
Table B.48 – Cancel service parameter mapping . 168
Table B.49 – Cancel negative response mapping to IEM ServiceError . 169
Table B.50 – Operate service parameter mapping . 169
Table B.51 – Operate negative response mapping to IEM ServiceError . 170
Table B.52 – TimeActivatedOperate service parameter mapping . 171
Table B.53 – TimeActivatedOperate negative response mapping to IEM ServiceError . 172
Table B.54 – CommandTermination + service parameter mapping. 173
Table B.55 – CommandTermination – service parameter mapping . 173
Table B.56 – Protocol stack details.174
Table C.1 – Mapping of IEC 61400-25-3 IEM onto ISO 9506 according to
IEC 61850-8-1 .176
Table C.2 – Mapping of AddSubscribtion service (Step 1). 179
Table C.3 – Mapping of AddSubscribtion service (Step 2). 180
Table C.4 – Mapping of AddSubscribtion service (Step 3). 180
Table C.5 – AddSubscription Negative response . 181
Table C.6 – Mapping of RemoveSubscribtion service – First MMS service. 181
Table C.7 – Mapping of RemoveSubscribtion service – second MMS service. 182
Table C.8 – RemoveSubscription Negative response.182
Table C.9 – QueryLogByTime mapping.183
Table C.10 – QueryLogAfter mapping .183
Table C.11 – Service and protocols for client/server communication A-Profile . 183
Table C.12 – Service and protocols for client/server TCP/IP T-Profile. 184
Table D.1 – Services Mapping overview of IEC 61400-25 IM and IEM. 187
Table D.2 – Example for mapping of LD and LN to CASDU and IOA .191
Table D.3 – Logical device mapping .192
Table D.4 – Logical node mapping.192
Table D.5 – CDCs defined in IEC 61400-25-2 .193
Table D.6 – CDC: Status Value, STV class .194
Table D.7 – CDC: Setpoint Value, SPV class.194
Table D.8 – CDC: Alarm, ALM class .194
Table D.9 – CDC: Command CMD class .195
Table D.10 – CDC: Event Counting, CTE class.195
Table D.11 – CDC: State Timing, TMS class.195
Table D.12 – Mapping structure basic CDC .196
Table D.13 – CDC: Controllable Analog set point, APC class. 197

61400-25-4 © IEC:2008(E) – 7 –
Table D.14 – CDC: Controllable analogue set point information (APC) mapping of data
attributes of the Functional Constraint MX .197
Table D.15 – CDC: Controllable Analog set point, APC class mapping of data and
attributed of the Functional Constrant CO .198
Table D.16 – Relationship between complex CDCs and IEC 60870-5-104 ASDUs . 198
Table D.17 – Mapping of IEC 61400-25 ACSI service into IEC 60870-5-104 services . 199
Table E.1 – Services requiring Client/Server Communication Profile.215
Table E.2 – Quality mapping.217
Table E.3 – CDC: Measured Value (MV) mapping.218
Table E.4 – CDC: Setpoint Parameter Value (SPV) mapping . 218
Table E.5 – CDC: Status Value (STV) mapping.219
Table E.6 – CDC: Alarm (ALM) mapping.220
Table E.7 – CDC: Command (CMD) mapping .220
Table E.8 – CDC: Event Counting (CTE) mapping .221
Table E.9 – CDC: State Timing (TMS) mapping .222
Table E.10 – CDC: Single Point Status (SPS) mapping. 223
Table E.11 – CDC: Integer Status (INS) mapping .223
Table E.12 – CDC: Controllable single point (SPC) mapping. 224
Table E.13 – CDC: Controllable integer status (INC) mapping . 224
Table E.14 – CDC: Binary Counter Reading (BCR) mapping.224
Table E.15 – CDC: Controllable analogue set point (APC) mapping.225
Table E.16 – CDC: Phase to ground (WYE) mapping.225
Table E.17 – CDC: Phase to phase (DEL) mapping . 226
Table E.18 – CDC: Device Name Plate (WDPL) mapping.227
Table E.19 – CDC: Logical Node Name Plate (LPL) mapping. 227
Table E.20 – CDC: Alarm Set Status (ASS) mapping . 227
Table E.21 – Sample Data Class Attribute mapping . 228
Table E.22 – Sample Data Class mapping .228
Table E.23 – Sample partial Data Class mapping . 229

– 8 – 61400-25-4 © IEC:2008(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
______________
WIND TURBINES –
Part 25-4: Communications for monitoring
and control of wind power plants –
Mapping to communication profile

FOREWORD
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all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 61400-25-4 has been prepared by IEC technical committee 88:
Wind turbines.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The text of this standard is based on the following documents:
FDIS Report on voting
88/318/FDIS 88/327/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.

61400-25-4 © IEC:2008(E) – 9 –
A list of all parts of the IEC 61400 series, under the general title Wind turbines can be found
on the IEC website.
For the user’s convenience, a file containing the text of Clause A.7 is included with this
document.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual edition of this document may be issued at a later date.

– 10 – 61400-25-4 © IEC:2008(E)
INTRODUCTION
The IEC 61400-25 series defines communications for monitoring and control of wind power
plants. The architecture of the IEC 61400-25 series has been selected to provide an abstract
definition of classes and services such that the specifications are independent of specific
protocol stacks, implementations, and operating systems. This part of the IEC 61400-25
series specifies the mapping of these abstract classes and services to protocol stacks.
NOTE Performance of the IEC 61400-25 series implementations are application-specific. The IEC 61400-25
series does not guarantee a certain level of performance. This is beyond the scope of the IEC 61400-25 series.
However there is no underlying limitation in the communications technology to prevent high-speed application
(millisecond level responses).

61400-25-4 © IEC:2008(E) – 11 –
WIND TURBINES –
Part 25-4: Communications for monitoring
and control of wind power plants –
Mapping to communication profile

1 Scope
The focus of the IEC 61400-25 series is on the communications between wind power plant
components such as wind turbines and actors such as SCADA systems. Internal
communication within wind power plant components is outside the scope of the IEC 61400-25
series.
The IEC 61400-25 series is designed for a communication environment supported by a client-
server model. Three areas are defined, that are modelled separately to ensure the scalability
of implementations:
1) wind power plant information model,
2) information exchange model, and
3) mapping of these two models to a standard communication profile.
The wind power plant information model and the information exchange model, viewed
together, constitute an interface between client and server. In this conjunction, the wind
power plant information model serves as an interpretation frame for available wind power
plant information. The wind power plant information model is used by the server to offer the
client a uniform, component-oriented view of the wind power plant data. The information
exchange model reflects the whole active functionality of the server. The IEC 61400-25 series
enables connectivity between a heterogeneous combination of client and servers from
different manufacturers and suppliers.
As depicted in Figure 1, the IEC 61400-25 series defines a server with the following aspects:
– Information provided by a wind power plant component, for example, ‘wind turbine rotor
speed’ or ‘total power production of a certain time interval’ is modelled and made available
for access. The information modelled in the IEC 61400-25 series is defined in IEC 61400-
25-2.
– Services to exchange values of the modelled information, defined in IEC 61400-25-3.
– Mapping to a communication profile, providing a protocol stack to carry the messages, i.e.
the service requests and responses and the values from the modelled information
(IEC 61400-25-4).
IEC 61400-25-5 defines test cases associated with information, services and protocol stacks
for conformance testing of both servers and clients.
The IEC 61400-25 series only defines how to model the information, information exchange
and mapping to specific communication protocols. The IEC 61400-25 series excludes a
definition of how and where to implement the communication interface, the application
program interface and implementation recommendations. However, the objective of the
IEC 61400-25 series is that the information associated with a single wind power plant
component (such as a wind turbine) is accessible through a corresponding logical device.

– 12 – 61400-25-4 © IEC:2008(E)
This part of the IEC 61400-25 series specifies the specific mappings to protocol stacks
encoding the messages required for the information exchange between a client and a remote
server for:
– data access and retrieval,
– device control,
– event reporting and logging,
– publisher/subscriber,
– self-description of devices (device data dictionary),
– data typing and discovery of data types.
The mappings specified in this part of IEC 61400-25 comprise:
– a mapping to SOAP-based web services,
– a mapping to OPC/XML-DA,
– a mapping to IEC 61850-8-1 MMS,
– a mapping to IEC 60870-5-104,
– a mapping to DNP3.
All mappings are optional, but at least one optional mapping shall be selected in order to
be compliant with this part of IEC 61400-25.
Communication model of IEC 61400-25
Client Server
Messaging
Messaging
Information exchange Information exchange
Information exchange through mapping Information exchange
through mapping
model (get, set, report, model (get, set, report,
model (get, set, report, to communication model (get, set, report,
to communication
log, control, publish / log, control, publish /
log, control, publish / log, control, publish /
profile (Read,
profile (Read,
subscribe, etc.) subscribe, etc.)
subscribe, etc.) write, . message) subscribe, etc.)
write, . message)
defined in defined in
defined in defined in defined in
defined in
Wind power
Actor IEC 61400-25-3 IEC 61400-25-3
IEC 61400-25-3 IEC 61400-25-4 IEC 61400-25-3
plant
e. g. IEC 61400-25-4
component
SCADA
e. g. wind turbine
Wind power plant Wind power plant
Wind power plant Wind power plant
information model information model
information model information model
(rotor speed, break
defined in
(rotor speed, break
defined in
status, total power
status, total power
Application IEC 61400-25-2 Application
IEC 61400-25-2 production, …)
production, …)
defined in
defined in
IEC 61400-25-2
IEC 61400-25-2
Outside
Outside
scope
scope
Conformance test cases (information, exchange, communication profile)
Conformance test cases (information, exchange, communication profile)
defined in IEC 61400-25-5
defined in IEC 61400-25-5
IEC  1370/08
Figure 1 – Conceptual communication model of IEC 61400-25 series
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 60870-5-104:2006, Telecontrol equipment and systems – Part 5-104: Transmission
protocols – Network access for IEC 60870-5-101 using standard transport profiles

61400-25-4 © IEC:2008(E) – 13 –
IEC 61400-25 (all parts), Wind turbines – Part 25: Communications for monitoring and control
of wind power plants
IEC 61850-7-2:2003, Communication networks and systems in substations – Part 7-2: Basic
communication structure for substations and feeder equipment – Abstract communication
service interface (ACSI)
IEC 61850-7-3:2003, Communication networks and systems in substations – Part 7-3: Basic
communication structure for substations and feeder equipment – Common data classes
IEC 61850-8-1:2004, 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
DNP3 Specification, Volume 2 – Volume 8:2007
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
actor
role a system plays in the context of monitoring and control, while it is not directly involved in
wind power plant operation, such as Supervisory Control and Data Acquisition System
(SCADA)
NOTE There are many other designations, for example, central management system, monitoring and control
system, remote control system.
3.2
alarm
state information. Statement of safety intervention by the wind turbine control system (i.e
on/off)
3.3
command
controllable data for system behaviour (enable/disable, active/deactivate, etc.)
3.4
communication function
used by an actor to configure, perform and monitor the information exchange with wind power
plants, for example operational and management function
3.5
control
operational function used for changing and modifying, intervening, switching, controlling,
parameterisation and optimising of wind power plants
3.6
data retrieval
operational function used for collecting of wind power plant data
3.7
diagnostics
management function used to set up and provide for self-monitoring of the communication
system
– 14 – 61400-25-4 © IEC:2008(E)
3.8
electrical system
component of a wind power plant responsible for collecting and transmitting the energy
produced in wind turbines
3.9
event
state transition (status, alarm, command)
3.10
function
task that is performed in the control centre or the wind power plant
NOTE Generally, a function consists of sub functions that exchange data with each other. Depending on the
function definition, functions themselves exchange data with other functions.
3.11
Intelligent Electronic Device
IED
any device incorporating one or more p
...