of DAXCBR the truck position information is available at TRUCK_POS output in
integer form.
Binary input signal LR_SWI is included in this function to indicate local or remote
switch position from the switchyard provided via I/O board. If the signal is set to
TRUE, changes of position are only allowed from switchyard level. If the signal value
is FALSE, commands from IED or higher level are permitted. When the signal value
is set to TRUE, all commands are rejected from internal IED clients.
The function can be blocked by activation of BLOCK input. Similarly, it is also
possible to block individually the open and closing operation by activating
BLK_OPEN and BLK_CLOSE input respectively. The group of execution
information XOUT from the GNRLCSWI is connected to XIN input of DAXCBR/
DAXSWI function.
The binary output responsible for opening or closing of the circuit breaker or the
disconnector or earth switch is connected to EXE_OP and EXE_CL output of the
DAXCBR/DAXSWI function.
If the function is blocked to perform opening or closing operation, the same will be
indicated as OP_BLKD and CL_BLKD outputs. The blocking of execution of
position updates if any by QCCBAY function is reflected at UPD_BLKD output.
CNT_VAL indicates the number of closing and opening operation performed by the
apparatus, the same can be reset via RS_OPR_CNT input.
Depending on the error that occurs during the command sequence, the error signal is
set with a value. An output L_CAUSE on the function block indicates the latest value
of error during the command.
Example
A typical example is shown in
, indicating the interconnection between
SCILO, GNRLCSWI and DAXSWI functions:
IEC09000611-1-en.vsd
IEC09000611 V1 EN
Figure 55:
Example of interaction between SCILO, GNRLCSWI, and DAXSWI
functions
1MRS756800 F
Section 5
Protection and control engineering
630 series
77
Engineering Manual
