Draft61850-7-4©IEC:2002 -16- 57WG10-12(61850-7-4)R3.0/FD1S 5 Logical Node classes 5.1 Logical Node groups Logical nodes are grouped according to the Logical Node Groups listed in Table 1.The names of Logical Nodes shall begin with the character representing the group to which the Logical Node belongs.For modelling per phase (e.g.switches or instrument transformers) one instance per phase shall be created(example see annex A.2.3). Table 1-List of Logical Node Groups Group Indicator Logical node groups A Automatic Control c Supervisory control G Generic Function References Interfacing and Archiving L System Logical Nodes M Metering and Measurement P Protection Functions R Protection Related Functions S林 Sensors,Monitoring T* Instrument Transformer X** Switchgear Y** Power Transformer and Related Functions Z** Further(power system)Equipment **LNs of this group exist in dedicated IEDs if a process bus is used.Without a process bus,LNs of this group are the 1/Os in the hardwired IED one level higher(e.g.in a bay unit)representing the external device by its inputs and outputs(process image- example see Figure 7 in annex B.3) Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 16 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 5 Logical Node classes 5.1 Logical Node groups Logical nodes are grouped according to the Logical Node Groups listed in Table 1. The names of Logical Nodes shall begin with the character representing the group to which the Logical Node belongs. For modelling per phase (e.g. switches or instrument transformers) one instance per phase shall be created (example see annex A.2.3). Table 1 – List of Logical Node Groups Group Indicator Logical node groups A Automatic Control C Supervisory control G Generic Function References I Interfacing and Archiving L System Logical Nodes M Metering and Measurement P Protection Functions R Protection Related Functions S** Sensors, Monitoring T** Instrument Transformer X** Switchgear Y** Power Transformer and Related Functions Z** Further (power system) Equipment **) LNs of this group exist in dedicated IEDs if a process bus is used. Without a process bus, LNs of this group are the I/Os in the hardwired IED one level higher (e.g. in a bay unit) representing the external device by its inputs and outputs (process image – example see Figure 7 in annex B.3)
Draft61850-7-4©lEC:2002 -17- 57WG10-12(61850-7-4)R3.0/FD1S 5.2 Interpretation of Logical Node tables The interpretation of the headings for the logical node tables is presented in Table 2. Table 2-Interpretation of Logical Node tables Column Heading Description Attribute Name Name of the Data Attr.Type Common Data Class that defines the structure of the data.See IEC 61850-7-3. Explanation Short explanation of the data and how it is used. Transient Data -The status of data with this designation are momentary and must be logged or reported to provide evidence of their momentary state.Some T may be only valid on modelling level.If no real time services are available (e.g.between CSWI and XCBR)and GSE messages(see IEC 61850-7-2)have been used instead,the implementation of this data shall persistent at least until the related GSE message has finalized its repetitions. Whether data,data sets,control blocks or services are mandatory(M) or optional (O)for the instantiation of a specific Logical Node.Note the attributes for data that are instantiated may also be mandatory or M/O optional based on the CDC(Attr.Type)definition in IEC 61850-7-3. Where the letter C is used for"conditional"at least one of the data labelled with C shall be used from each category where C occurs All Attribute Names (Data Names)are listed alphabetically in Clause 6.The data in the Logical Nodes Classes are grouped into various categories (as described below)for the convenience of the reader.This grouping may result in some overlapping. All Attribute Names (Data Names)are listed alphabetically in Clause 6.Despite some overlapping,the data in the Logical Nodes Classes are for the convenience of the reader grouped into some categories explained in the following. Common Logical Node Information is information independent of the dedicated function represented by the LN class.Mandatory data(M)are common to all LN classes;optional data(O)are valid for a reasonable subset of LN classes. Status Information is data,which shows either the status of the process or of the function allocated to the LN class.This information is produced locally and cannot be changed remotely unless substitution is applicable.Data such as "start"or"trip"are listed in this category.Most of these data are mandatory. Settings are data,which are needed for the function to operate.Since many settings are dependent on the implementation of the function,only a commonly agreed minimum is standardised.They may be changed remotely,but normally not very often.Most data of this category are optional (O). Measured values are analogue data measured from the process or calculated in the functions such as currents. voltages,power,etc.This information is produced locally and cannot be changed remotely unless substitution is applicable. Controls are data,which are changed by commands such as switchgear state(ON/OFF),tap changer Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 17 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 5.2 Interpretation of Logical Node tables The interpretation of the headings for the logical node tables is presented in Table 2. Table 2 – Interpretation of Logical Node tables Column Heading Description Attribute Name Name of the Data Attr. Type Common Data Class that defines the structure of the data. See IEC 61850-7-3. Explanation Short explanation of the data and how it is used. T Transient Data – The status of data with this designation are momentary and must be logged or reported to provide evidence of their momentary state. Some T may be only valid on modelling level. If no real time services are available (e.g. between CSWI and XCBR) and GSE messages (see IEC 61850-7-2) have been used instead, the implementation of this data shall persistent at least until the related GSE message has finalized its repetitions. M/O Whether data, data sets, control blocks or services are mandatory (M) or optional (O) for the instantiation of a specific Logical Node. Note the attributes for data that are instantiated may also be mandatory or optional based on the CDC (Attr. Type) definition in IEC 61850-7-3. Where the letter C is used for “conditional” at least one of the data labelled with C shall be used from each category where C occurs All Attribute Names (Data Names) are listed alphabetically in Clause 6. The data in the Logical Nodes Classes are grouped into various categories (as described below) for the convenience of the reader. This grouping may result in some overlapping. All Attribute Names (Data Names) are listed alphabetically in Clause 6. Despite some overlapping, the data in the Logical Nodes Classes are for the convenience of the reader grouped into some categories explained in the following. Common Logical Node Information is information independent of the dedicated function represented by the LN class. Mandatory data (M) are common to all LN classes; optional data (O) are valid for a reasonable subset of LN classes. Status Information is data, which shows either the status of the process or of the function allocated to the LN class. This information is produced locally and cannot be changed remotely unless substitution is applicable. Data such as “start” or “trip” are listed in this category. Most of these data are mandatory. Settings are data, which are needed for the function to operate. Since many settings are dependent on the implementation of the function, only a commonly agreed minimum is standardised. They may be changed remotely, but normally not very often. Most data of this category are optional (O). Measured values are analogue data measured from the process or calculated in the functions such as currents, voltages, power, etc. This information is produced locally and cannot be changed remotely unless substitution is applicable. Controls are data, which are changed by commands such as switchgear state (ON/OFF), tap changer
Draft61850-7-4©IEC:2002 -18- 57WG10-12(61850-7-4)R3.0/FD1S position or resetable counters.They are typically changed remotely,and are changed during operation much more than Settings. 5.3 System Logical Nodes LN Group:L 5.3.1 General In this subclause,the system specific information is defined.This includes Common Logical Node Information (e.g.logical node mode control,nameplate information,operation counters) as well as information related to the physical device implementing the logical devices and logical nodes.These logical nodes are independent of the application domain.All other logical nodes are domain specific,but inherit mandatory and optional Data from these system logical nodes. LN Abstract LN Class defined in IEC 61850-7-2 LPHD Common LN LLNO Domain Specific LN e.g.XCBR Figure 2-LN Relationships All logical node classes defined in this document inherit their structure from the abstract logical nodes class (LN,see Figure 2)defined in IEC 61850-7-2.Except the logical node class 'Physical Device Information'(LPHD)all logical node classes (LLNO and domain specific LNs)defined in this document inherit at least the mandatory data of the common logical node (Common LN). Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 18 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 position or resetable counters. They are typically changed remotely, and are changed during operation much more than Settings. 5.3 System Logical Nodes LN Group: L 5.3.1 General In this subclause, the system specific information is defined. This includes Common Logical Node Information (e.g. logical node mode control, nameplate information, operation counters) as well as information related to the physical device implementing the logical devices and logical nodes. These logical nodes are independent of the application domain. All other logical nodes are domain specific, but inherit mandatory and optional Data from these system logical nodes. LN Abstract LN Class defined in IEC 61850-7-2 Domain Specific LN e.g. XCBR LPHD Common LN LLN0 Figure 2 – LN Relationships All logical node classes defined in this document inherit their structure from the abstract logical nodes class (LN, see Figure 2) defined in IEC 61850-7-2. Except the logical node class ‘Physical Device Information’ (LPHD) all logical node classes (LLN0 and domain specific LNs) defined in this document inherit at least the mandatory data of the common logical node (Common LN)
Draft61850-7-4©1EC:2002 -19- 57WG10-12(61850-7-4)R3.0/FD1S 5.3.2 LN:Physical device information Name:LPHD This LN is introduced in Part IEC 61850-7-4 to model common issues for physical devices. LPHD class Attribute Name Attr.Type Explanation M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data PhyName DPL Physical device name plate M PhyHealth ISI Physical device health M OutOv SPS Output communications buffer overflow 0 InOv SPS Input communications buffer overflow 0 NumPwrUp ISI Number of Power ups 0 WrmStr ISI Number of Warm Starts 0 WacTrg ISI Number of watchdog device resets detected 0 PwrUp SPS Power Up detected 0 PwrDn. SPS Power Down detected 0 PwrSupAlm SPS External power supply alarm 0 RsStat SPC Reset device statistics 0 5.3.3 Common Logical Node The compatible logical nodes classes defined in this document are specialisations of this common logical node class. Common Logical Node class Attribute Name Attr.Type Explanation M/O T LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Mandatory Logical Node Information (Shall be inherited by ALL LN but LPHD) Mod INC Mode M Beh ISI Behaviour M Health ISI Health M NamPlt LPL Name plate M Optional Logical Node Information Loc SPS Local operation 0 EEHealth ISI External equipment health 0 EEName DPL External equipment name plate 0 OpCntRs INC Operation counter resetable OpCnt ISI Operation counter OpTmh ISI Operation time 0 Data Sets (see IEC 61850-7-2) Inherited and specialised from Logical Node class(see IEC 61850-7-2). Control Blocks (see IEC 61850-7-2) Inherited and specialised from Logical Node class(see IEC 61850-7-2). Services(see IEC 61850-7-2) Inherited and specialised from Logical Node class(see IEC 61850-7-2). A specialisation of this Common Logical Node class shall inherit all Data,Data Sets,Control Blocks and Services that are mandatory.For the optional data there are three choices for specialisations: not to inherit these items inherit these items and leave them to be optional Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 19 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 5.3.2 LN: Physical device information Name: LPHD This LN is introduced in Part IEC 61850-7-4 to model common issues for physical devices. LPHD class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data PhyName DPL Physical device name plate M PhyHealth ISI Physical device health M OutOv SPS Output communications buffer overflow O InOv SPS Input communications buffer overflow O NumPwrUp ISI Number of Power ups O WrmStr ISI Number of Warm Starts O WacTrg ISI Number of watchdog device resets detected O PwrUp SPS Power Up detected O PwrDn SPS Power Down detected O PwrSupAlm SPS External power supply alarm O RsStat SPC Reset device statistics T O 5.3.3 Common Logical Node The compatible logical nodes classes defined in this document are specialisations of this common logical node class. Common Logical Node class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Mandatory Logical Node Information (Shall be inherited by ALL LN but LPHD) Mod INC Mode M Beh ISI Behaviour M Health ISI Health M NamPlt LPL Name plate M Optional Logical Node Information Loc SPS Local operation O EEHealth ISI External equipment health O EEName DPL External equipment name plate O OpCntRs INC Operation counter resetable O OpCnt ISI Operation counter O OpTmh ISI Operation time O Data Sets (see IEC 61850-7-2) Inherited and specialised from Logical Node class (see IEC 61850-7-2). Control Blocks (see IEC 61850-7-2) Inherited and specialised from Logical Node class (see IEC 61850-7-2). Services (see IEC 61850-7-2) Inherited and specialised from Logical Node class (see IEC 61850-7-2). A specialisation of this Common Logical Node class shall inherit all Data, Data Sets, Control Blocks and Services that are mandatory. For the optional data there are three choices for specialisations: • not to inherit these items • inherit these items and leave them to be optional
Draft61850-7-4©IEC:2002 -20- 57WG10-12(61850-7-4)R3.0/FD1S inherit these items and define them to be mandatory 5.3.4 LN:Logical node zero Name:LLNO This LN shall be used to address common issues for Logical Devices. LLNO class Attribute Name Attr.Type Explanation M/O T LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class M OpTmh ISI Operation time Diag SPC Run Diagnostics 0 LEDRs SPC LED reset 0 Loc SPS Local operation for complete logical device 0 Version 3.0:22.August 2002
Draft 61850-7-4 IEC: 2002 – 20 – 57/WG10-12(61850-7-4)R3.0/FDIS Version 3.0: 22. August 2002 • inherit these items and define them to be mandatory 5.3.4 LN: Logical node zero Name: LLN0 This LN shall be used to address common issues for Logical Devices. LLNO class Attribute Name Attr. Type Explanation T M/O LNName Shall be inherited from Logical-Node Class (see IEC 61850-7-2). Data Common Logical Node Information LN shall inherit all Mandatory Data from Common Logical Node Class. M OpTmh ISI Operation time O Diag SPC Run Diagnostics O LEDRs SPC LED reset T O Loc SPS Local operation for complete logical device O