Sel 751A - Table F.5 Unbuffered Report Control Block Client Access; Figure F.2 SEL-751 A Datasets

F.7
Date Code 20100129 Instruction Manual SEL-751A Relay
IEC 61850 Communications
IEC 61850 Operation
For Buffered Reports, only one client can enable the RptEna attribute of the
BRCB at a time resulting in a client association for that BRCB. Once enabled,
the associated client has exclusive access to the BRCB until the connection is
closed or the client disables the RptEna attribute. Once enabled, all
unassociated clients have read only access to the BRCB.
For Unbuffered Reports, up to six (6) clients can enable the RptEna attribute
of the URCB at a time, resulting in multiple client associations for that URCB.
Once enabled, each client has independent access to a copy of that URCB.
The Resv attribute is writable, however, the SEL-751A does not support
reservations. Writing any field of the URCB causes the client to obtain their
own copy of the URCB-in essence, acquiring a reservation.
Datasets
The list of datasets in Figure F.2 is the default for an SEL-751A device.
Figure F.2 SEL-751A Datasets
Table F.5 Unbuffered Report Control Block Client Access
RCB Attribute
User changeable
(Report Disabled)
User changeable
(Report Enabled)
Default Values
RptId YES FALSE
RptEna YES YES FALSE
Resv YES FALSE
OptFlds YES segNum
timeStamp
dataSet
reasonCode
dataRef
BufTm YES 250
TrgOps YES dchg
qchg
IntgPd YES FALSE
GI YES
a
a
Exhibits a pulse behavior. Write a one to issue the command. Once command is accepted will
return to zero. Always read as zero.
0