ABB RET670 Applications Manual page 614

Section 3
IED application
608
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 IED
. . .
ANSI05000117 V2 EN
Figure 234: Application principles for reservation over the station bus
The reservation can also be realized with external wiring according to the application
example in figure 235. 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
BI
BO
ANSI05000118 V2 EN
Figure 235: Application principles for reservation with external wiring
SCSWI
RES_GRT
RES_RQ
3
RESIN
EXCH _IN
EXCH _ OUT
From other
. . .
SCSWI in
the bay
RESIN
EXCH _IN
EXCH _OUT
3
Station bus
IED
SCSWI
RES_ EXT
SELECTED
Other SCSWI in the bay
BI
1MRK504116-UUS C
QCRSV
RES_RQ1
. .
RES_RQ8
RES_GRT1 To other
. .
SCSWI
RES_GRT8
in the
RES_ DATA bay
2
en 05000117 _ansi . vsd
OR
BO
+
en 05000118_ ansi. vsd
Application manual