ABB RELION 670 Series Applications Manual page 540

Section 14
Control
transferred over the station bus for evaluation in the IED. After the evaluation the operation
can be executed with high security.
This functionality is realized over the station bus by means of the function blocks QCRSV and
RESIN. The application principle is shown in Figure 298.
The function block QCRSV handles the reservation. It sends out either the reservation request
to other bays or the acknowledgement if the bay has received a request from another bay.
The other function block RESIN receives the reservation information from other bays. The
number of instances is the same as the number of involved bays (up to 60 instances are
available). The received signals are either the request for reservation from another bay or the
acknowledgment from each bay respectively, which have received a request from this bay. Also
the information of valid transmission over the station bus must be received.
IED
. . .
IEC05000117 V2 EN-US
Figure 298: Application principles for reservation over the station bus
The reservation can also be realized with external wiring according to the application example
in Figure 299. This solution is realized with external auxiliary relays and extra binary inputs and
outputs in each IED, but without use of function blocks QCRSV and RESIN.
IED
IEC05000118 V2 EN-US
Figure 299: Application principles for reservation with external wiring
534
IED
3
RESIN
EXCH_IN
EXCH_OUT
RESIN
EXCH_IN
EXCH_OUT
3
BI BO
SCSWI
RES_GRT
RES_RQ
From other
. . .
SCSWI in
the bay
Station bus
IED
SCSWI
RES_EXT
SELECTED
Other SCSWI in the bay
BI
1MRK 504 152-UEN B
QCRSV
RES_RQ1
. .
RES_RQ8
RES_GRT1 To other
. .
SCSWI
RES_GRT8
in the
RES_DATA bay
2
en05000117.vsd
OR
BO
en05000118.vsd
Application manual
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