ABB REQ650 Applications Manual page 238

Section 10
Control
232
• A request initiates to reserve other bays to prevent simultaneous operation.
• Actual position inputs for interlocking information are read and evaluated if the
operation is permitted.
• The synchrocheck/synchronizing conditions are read and checked, and performs
operation upon positive response.
• The blocking conditions are evaluated
• The position indications are evaluated according to given command and its
requested direction (open or closed).
The command sequence is supervised regarding the time between:
• Select and execute.
• Select and until the reservation is granted.
• Execute and the final end position of the apparatus.
• Execute and valid close conditions from the synchrocheck.
At error the command sequence is cancelled.
The mid position of apparatuses can be suppressed at SCSWI by setting the
tIntermediate at (SXCBR/SXSWI) to an appropriate value.
The switch controller is not dependent on the type of switching device SXCBR or
SXSWI. The switch controller represents the content of the SCSWI logical node
(according to IEC 61850) with mandatory functionality.
Bay control (QCBAY)
The Bay control (QCBAY) is used to handle the selection of the operator place for the
bay. The function gives permission to operate from two types of locations either from
Remote (for example, control centre or station HMI) or from Local (local HMI on the
IED) or from all (Local and Remote). The Local/Remote switch position can also be
set to Off, which means no operator place selected that is, operation is not possible
neither from local nor from remote.
QCBAY also provides blocking functions that can be distributed to different
apparatuses within the bay. There are two different blocking alternatives:
• Blocking of update of positions
• Blocking of commands
The function does not have a corresponding functionality defined in the IEC 61850
standard, which means that this function is included as a vendor specific logical node.
1MRK 505 291-UEN A
Application manual