LCCH class

Data object name

Common data class

Explanation

T

N1/0/ C

Fer

INS

Frame error rate on this channel; count of erroneous (or missed, in case of redundancy) messages for each 1 000 messages forwarded to the application.


0

RedFer

INS

Frame error rate on redundant channel; count of missed messages on this channel for each 1 000 messages forwarded to the application.


О

Measured and metered values

RxCnt

BCR

Number of received messages


0

RedRxCnt

BCR

Number of received messages on redundant channel


О

TxCnt

BCR

Number of sent messages


О

Settings

ApNam

VSG

Access point name to which this channel belongs; only needed, if more than one access point and more than one physical channel exist.


О

ChLivTms

ING

Timeout time for channel live supervision; default 5 s


О

NOTE If channel redundancy with duplicate remove is used, the number of lost messages can be calculated as 'messages forwarded to application as result of both channels - messages received on this channel'. In this case, the FER is calculated by counting the received messages per channel, until 1 000 messages are forwarded to the application, and then using above formula per channel.

Observe that in PRP any message received for a wrong channel is also forwarded to the application. Thus a wrong connection of cables to ports can be detected, if Fer and RedFer have a value around 500 (1 000 messages with wrong channel identification forwarded to application, 500 messages with wrong channel identification received on each channel).

Condition C: is mandatory, if channel redundancy is used.



  1. LN: GOOSE subscription Name: LGOS

The LN LGOS shall be used monitoring of GOOSE messages. There shall be one instance of LGOS per GOOSE subscription for a given GOOSE source. It allows for instance to diagnose the subscription state of a GOOSE message.

LGOS class

Data object name

Common data class

Explanation

T

N1/0/ C

LNName


The name shall be composed of the class name, the LN-Prefix and LN- lnstance-!D according to IEC 61B50-7-2, Clause 22.



Data objects

Status information

NdsCom

SPS

Subscription needs commissioning


0

St

SPS

Status of the subscription (True = active, False=not active)


N1

SimSt

SPS

Status showing that really Sim messages are received and accepted


О

LastStNum

INS

Last state number received


О

ConfRevNum

INS

Expected configuration revision number


О

Settings

GoCBRef

ORG

Reference to the subscribed GOOSE control block


О



  1. LN: Sampled value subscription Name: LSVS

The LN LSVS shall be used for diagnose and monitoring supervision of sampled value messages. There shall be one instance of LSVS per SV subscription for a given server. It allows for instance to diagnose the subscription of a SV message (status of subscription).



LSVS class

Data object name

Common data class

Explanation

T

MIDI c

LNName


The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22.



Data objects

Status information

NdsCom

SPS

Subscription needs commissioning


0

St

SPS

Status of the subscription (True = active, False = not active)


0

SimSt

SPS

Status showing that really Sim messages are received and accepted


0

LastStNum

INS

Last state number received


0

ConfRevNum

INS

Expected configuration revision number


0

Settings

SvCBRef

ORG

Reference to the subscribed SV control block


0



  1. LN: Time management Name: LTIM

The LN LTIM shall be use for diverse configurations regarding the local time of an IED.

LTIM class

Data object name

Common data class

Explanation

T

М/О/ c

LNName


The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22.



Data objects

Status information

TmDT

SPS

indicating if for this location daylight saving time is in effect now


M

Settings

TmOfsTmm

ING

Offset of local time from UTC in minutes


M

TmUseDT

SPG

Flag indicating if this location is using daylight saving time


M

TmChgDayTm

TSG

Local time of next change to daylight saving time


о

TmChgStdTm

TSG

Local time of next change to standard time


0

StrWeekDay

ENG

Day of the start of the local week for statistical calculation (Monday (default) I Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday )


0



  1. LN: Time master supervision Name: LTMS

The LN LTMS shall be used for the configuration and supervision of the time synchronization function in an IED.

LTMS class

Data object name

Common data class

Explanation

T

М/О/ c

LNName


The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22.



Data objects

Status information

TmAcc

INS

Number of significant bits in the Fraction Of Second in the time accuracy part of the time stamp. See IEC 61850-7-2.


0

TmSrc

VSS

Current time source


M

TmSyn

ENS

Time synchronized according to IEC 61850-9-2


0

TmChSU

SPS

Time channel status (up/down)


0

Settings

TmSrcSetl

VSG

Time source setting (“1588” in case the time source is a IEEE 1588 source or-dotted IP-address)


0



  1. LN: Service tracking Name: LTRK

The LN LTRK allows to track service parameters. With this tracking, service parameters will stay visible after the execution of service. For this purpose, common data classes are needed which contain the parameters of the services according to IEC 61850-7-2.

LTRK class

Data object name

Common data class

Explanation

T

М/О/ c

LNName


The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22.



Data objects

Control and access service tracking

SpcTrk

CTS

Control service tracking for controllable single point


о

DpcTrk

CTS

Control service tracking for controllable double point


о

IncTrk

CTS

Control service tracking for controllable Integer


о

EncTrkl

CTS

Control service tracking for enumerated controllable


о

ApcFTrk

CTS

Control service tracking for controllable analogue set point with float command


О

ApcIntTrk

CTS

Control service tracking for controllable analogue set point with Integer command


О

BscTrk

CTS

Control service tracking for binary controlled step position information


О

IscTrk

CTS

Control service tracking for integer controlled step position information


О

BacTrk

CTS

Control service tracking for binary controlled analogue process value


О

GenTrk

CST

Common service tracking for all services for which no specific tracking data exists


о

UrcbTrk

UTS

Access service tracking for unbuffered report control block


О

BrcbTrk

BTS

Access service tracking for buffered report control block


О

LocbT rk

LTS

Access service tracking for log control block


О

GocbTrk

GTS

Access service tracking for goose control block


О

MsvcbTrk

MTS

Access service tracking for multicast sampled values control block


О

UsvcbTrk

NTS

Access service tracking for unicast sampled values control block


О

SgcbTrk

STS

Access service tracking for setting group control block


о

NOTE The common data classes for the data objects in LTRK are specified in IEC 61850-7-2.



  1. Logical nodes for automatic control LN Group: A

    1. Modelling remarks

Table 3 - Relation between IEC 61850-5 and IEC 61850-7-4 for automatic control LNs

Functionality

Defined in IEC 61850-5 by LN

Modelled in IEC 61850-7-4 by LN

Comments

Zero voltage tripping

AZVT

PTUV

The start value has to discriminate between live and dead. The delay time has to be reasonably long to discriminate between a transient voltage zero or a permanent switched off line.

Automatic neutral (starpoint) control

ANCR

ANCR

ARIS

Automatic control of suppression (Petersen) coil Automatic wattmetric increase with thermal supervision



  1. LN: Neutral current regulator Name: ANCR

For a description of this LN, see IEC 61850-5. This LN shall be used for regulation of suppression coils (ASC / Petersen coil) as tap coils and plunger core coils.



ANCR class

Data object name

Common data class

Explanation

T

M/O/C

LNName


The name shall be composed of the class name, the LN-Prefix and LN- Instance-ID according to IEC 61850-7-2, Clause 22.



Data objects

Status information

LocKey

SPS

Local or remote key


0

Loc

SPS

Local control behaviour


M

HiColPos

INS

High coil position


о

LoColPos

INS

Low coil position


о

ColOpR

SPS

Change coil position rise


О

ColOpL

SPS

Change coil position lower


о

ColChgOp

SPS

Change coil position in operation


о

StFixCol

SPS

Status of external fixcoil (True - fixcoil is connected, False - not connected)


О

StCIcTun

ENS

Result of tuning: not tuned , tuned, tuned but not compensated, Umax,Umax_nC(Umax- but not compensated), Umax_not compensated due to U continuous limitation


О

PotAlm

SPS

Potentiometer alarm


О

MotAlm

SPS

Motor drive alarm due to no movement


о

MotWrn

SPS

Motor for Petersen coil operating time exceeded


О

ClcSeqWrn

SPS

Number of calculation sequence exceeded in automatic/manual mode


О

Measured and metered values

ColPosA

MV

Coil position (usually as current in Ampere)


о

AResoPt

MV

Current at the resonance-point


О

AWatt

MV

Wattmetric part of the residual current at the fault location


О

ADetun

MV

Detuning due to the actual coil position


О

Damp

MV

Damping of the network


О

Capaclmb

MV

Capacitive imbalance of the network


О

VolResoPt

CMV

Value of the voltage at the resonance point


О

NeutVol

CMV

Neutral to ground voltage


о

Controls

OpCntRs

INC

Resettable operation counter


О

LocSta

SPC

Switching authority at station level


О

TapChg

BSC

Change tap position (stop, higher, lower)


С1

ColTapPos

ISC

Move coil to specified discrete coil position


С1

ColPos

APC

Move coil to specified continuous coil position


С1

RCol

SPC

Raise plunger coil position


м

LCol '

SPC

Lower plunger coil position


м

Auto

SPC

Automatic / manual operation


м

StrCIc

SPC

Start calculation sequence


О

ParOp

SPC

Parallel/lndependent operation (True - parallel, False - independent)


О

FixCol

APC

Size of external fix coil


О

Settings

ParColMod

ENG

Mode of parallel operation of Petersen coil (Master/ Slave | Master/ Slave with fixed slave coil position | Master/ Slave with variable slave coil position I Parallel operation without communication)


м

ParMod

ENG

Set current regulator mode during control (master, slave, independent)


О