Error handling
Depending on the error that occurs during the command sequence, the error signal will be
set with a value. Table
describes vendor specific cause values in addition to these
specified in IEC 61850-8-1 standard. The list of values of the “cause” are in order of
priority. The values are available over the IEC 61850. An output L_CAUSE on the
function block indicates the latest value of the error during the command.
Table 195:
Values for "cause" signal in priority order
Apparatus control
function
Description
–22
wrongCTLModel
–23
blockedForCommand
–24
blocked-for-open-command
–25
blocked-for-close-command
–30
longOperationTime
–31
switch-not-start-moving
–32
persistent-intermediate-state
–33
switch-returned-to-initial-position
–34
switch-in-bad-state
–35
not-expected-final-position
10.3.9.2
Circuit breaker SXCBR
The users of the Circuit breaker function (SXCBR) is other functions such as for example,
switch controller, protection functions, autorecloser function or an IEC 61850 client
residing in another IED or the operator place. This switch function executes commands,
evaluates block conditions and evaluates different time supervision conditions. Only if all
conditions indicate a switch operation to be allowed, the function performs the execution
command. In case of erroneous conditions, the function indicates an appropriate "cause"
value.
SXCBR has an operation counter for closing and opening commands. The counter value
can be read remotely from the operator place. The value is reset from a binary input or
remotely from the operator place by configuring a signal from the Single Point Generic
Control 8 signals (SPC8GGIO) for example.
Local/Remote switch
One binary input signal LR_SWI is included in SXCBR to indicate the local/remote
switch position from switchyard provided via the I/O board. If this signal is set to TRUE
it means that change of position is allowed only from switchyard level. If the signal is set
to FALSE it means that command from IED or higher level is permitted. When the signal
is set to TRUE all commands (for change of position) from internal IED clients are
Section 10
1MRK 511 287-UUS A
Control
266
Technical manual
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