ABB REL650 Applications Manual page 346

Section 11
Control
340
To ensure that the interlocking information is correct at the time of operation, a reservation
method is available in the IEDs. With this reservation method the reserved signal can be
used for evaluation of permission to select and operate the apparatus.
This functionality is realized over the station bus by means of the function block
SELGGIO.
The SELECTED output signal from the respective SCSWI function block in the own bay
is connected to the inputs of the SELGGIO function block. The output signal RESERVED
from SELGGIO is connected to the input RES_EXT of the SCSWI function block. If the
bay is not currently reserved, the SELGGIO output signal RESERVED is FALSE.
Selection for operation on the SCSWI block is now possible. Once any SCSWI block is
selected, and if its output SELECTED is connected to the SELGGIO block, then other
SCSWI functions as configured are blocked for selection. The RESERVED signal from
SELGGIO is also sent to other bay devices.
Due to the design of the plant, some apparatus might need reservation of the own bay as
well as reservations from other bays. Received reservation from other bays are handled by
a logical OR together with own bay reservation from the SELGGIO function block that
checks whether the own bay is currently reserved.
BAY 1
SELGGIO
SELECT1 RESERVED
SELECT2
SELECT3
SELECT4
SELECT5
SELECT6
SELECT7
SELECT8
SELECT9
SELECT10
SELECT11
SELECT12
SELECT13
SELECT14
SELECT15
SELECT16
BAY 2
BAY 3
ANSI11000169 V1 EN
Figure 146: Reservations from own and other bays
The reservation can also be realized with external wiring according to the application
example in figure 147. This solution is realized with external auxiliary relays and extra
binary inputs and outputs in each IED.
1MRK 506 334-UUS A
OR RESERVED
ANSI11000169_1_en.vsd
Application manual