ABB REC650 Technical Manual page 259

1MRK 511 287-UEN A
Technical manual
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.
It is always possible to make a substitution, independently of the
position indication and the status information of the I/O board. When
Local= Operation at
switch yard level
Remote= Operation at
IED or higher level
en05000096.vsd
Section 10
Control
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