From I/O switchLR
TRUE
FALSE
Local= Operation at
switch yard level
Remote= Operation at
IED or higher level
en05000096.vsd
IEC05000096 V1 EN-US
Figure 445: Local/Remote switch
Blocking principles
M13487-12 v5
SXCBR includes several blocking principles. The basic principle for all blocking signals is that they
will affect commands from all other clients for example, switch controller, protection functions
and autoreclosure.
The blocking possibilities are:
• Block/deblock for open command. It is used to block operation for open command.
• Block/deblock for close command. It is used to block operation for close command.
• Update block/deblock of positions. It is used to block the updating of position values. Other
signals related to the position will be reset.
• Blocking of function, BLOCK. If BLOCK signal is set, it means that the function is active, but no
outputs are generated, no reporting, control commands are rejected and functional and
configuration data is visible.
The above blocking outputs are stored in a non-volatile memory.
Substitution
M13487-22 v4
The substitution part in SXCBR is used for manual set of the position and quality of the switch.
The typical use of substitution is that an operator enters a manual value because that the real
process value is erroneous for some reason. SXCBR will then use the manually entered value
instead of the value for positions determined by the process.
It is always possible to make a substitution, independently of the position
indication and the status information of the I/O board. When substitution is
enabled, the other signals related to the position follow the substituted position.
The substituted values are stored in a non-volatile memory. If the function is
blocked or blocked for update when the substitution is released, the position value
is kept the same as the last substitution value, but the quality is changed to
"questionable, old data", indicating that the value is old and not reliable.
When the position of the SXCBR is substituted, its IEC61850-8-1 data object is
marked as “substituted", in addition to the substituted quality, but the position
quality of the connected SCSWI is not dependent on the substitution indication in
the quality, so it does not show that it is derived from a substituted value.
Section 14 1MRK 502 066-UUS B
Control
848
Technical manual
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