ABB RELION 670 Series Technical Manual page 869

1MRK 502 066-UUS B
Reservation of other bays
When the function QCRSV receives a request from an apparatus in the own bay that requires other
bays to be reserved as well, it checks if it already is reserved. If not, it will send a request to the
other bays that are predefined (to be reserved) and wait for their response (acknowledge). The
request of reserving other bays is done by activating the output RES_BAYS.
When it receives acknowledge from the bays via the input RES_DATA, it sets the output RES_GRTx
(where x=1-8 is the number of the requesting apparatus). If not acknowledgement from all bays is
received within a certain time defined in SCSWI (
reservation and set the attribute "1-of-n-control" in the "cause" signal.
Reservation request from another bay
When another bay requests for reservation, the input BAY_RES in corresponding function block
RESIN is activated. The signal for reservation request is grouped into the output signal EXCH_OUT
in RESIN, which is connected to input RES_DATA in QCRSV. If the bay is not reserved, the bay will
be reserved and the acknowledgment from output ACK_T_B is sent back to the requested bay. If
the bay already is reserved the reservation is kept and no acknowledgment is sent.
Blocking and overriding of reservation
If QCRSV function is blocked (input BLK_RES is set to true) the reservation is blocked. That is, no
reservation can be made from the own bay or any other bay. This can be set, for example, via a
binary input from an external device to prevent operations from another operator place at the
same time.
The reservation function can also be overridden in the own bay with the OVERRIDE input signal,
that is, reserving the own bay without waiting for the external acknowledge.
Bay with more than eight apparatuses
If only one instance of QCRSV is used for a bay that is, use of up to eight apparatuses, the input
EXCH_IN must be set to FALSE.
If there are more than eight apparatuses in the bay there has to be one additional QCRSV. The two
QCRSV functions have to communicate and this is done through the input EXCH_IN and
EXCH_OUT according to Figure 456. If more than one QCRSV are used, the execution order is very
important. The execution order must be in the way that the first QCRSV has a lower number than
the next one.
Technical manual
tResResponse ), the SCSWI will reset the
Section 14
Control
M13505-11 v2
M13505-15 v2
M13505-18 v3
M13505-22 v5
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