ABB REC650 ANSI Technical Manual page 273

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Technical manual
rejected, even trip commands from protection functions are rejected. The functionality of
the local/remote switch is described in figure 120.
From I/O switchLR
IEC05000096 V1 EN
Figure 120: Local/Remote switch
Blocking principles
SXCBR includes several blocking principles. The basic principle for all blocking signals
is that they will affect commands from all other clients for example, operators place,
protection functions, autoreclosure and so on.
The IEC 61850 communication has always priority over binary inputs,
e.g. a block command on binary inputs will not prevent commands over
IEC 61850.
The blocking possibilities are:
• Block/deblock for open command. It is used to block operation for open command.
Note that this block signal also affects the input OPEN for immediate command.
• Block/deblock for close command. It is used to block operation for close command.
Note that this block signal also affects the input CLOSE for immediate 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, signal from DO (Data Object) Behavior (IEC 61850).
If DO Behavior is set to "blocked" 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
The substitution part in SXCBR is used for manual set of the position for 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.
Local= Operation at
switch yard level
Remote= Operation at
IED or higher level
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Section 10
Control
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