Settings; Operation Principle; Switch Controller Scswi - ABB REC650 Technical Manual

Section 10
Control
10.3.8.4
10.3.9
10.3.9.1
.
248
Table 194: SELGGIO Output signals
Name Type
RESERVED BOOLEAN

Settings

The function does not have any parameters available in Local HMI or Protection and
Control IED Manager (PCM600).

Operation principle

Switch controller SCSWI

The Switch controller (SCSWI) is provided with verification checks for the select -
execute sequence, that is, checks the conditions prior each step of the operation. The
involved functions for these condition verifications are interlocking, reservation,
blockings and synchrocheck.
Control handling
Two types of control models can be used. The two control models are "direct with
normal security" and "SBO (Select-Before-Operate) with enhanced security". The
parameter CtlModel defines which one of the two control models is used. The control
model "direct with normal security" does not require a select whereas, the "SBO with
enhanced security" command model requires a select before execution.
Normal security means that only the command is evaluated and the resulting position
is not supervised. Enhanced security means that the command sequence is supervised
in three steps, the selection, command evaluation and the supervision of position.
Each step ends up with a pulsed signal to indicate that the respective step in the
command sequence is finished. If an error occurs in one of the steps in the command
sequence, the sequence is terminated and the error is mapped into the enumerated
variable "cause" attribute belonging to the pulsed response signal for the IEC 61850
communication. The last cause L_CAUSE can be read from the function block and
used for example at commissioning.
There is no relation between the command direction and the actual
position. For example, if the switch is in close position it is possible to
execute a close command.
Before an execution command, an evaluation of the position is done. If the parameter
PosDependent is true and the position is in intermediate state or in bad state no
execution command is sent. If the parameter is false the execution command is sent
independent of the position value.
1MRK 511 287-UEN A
Description
Reserved indication from bay/apparatus
Technical manual