Another function block type for supervision and control is the XLNPROXY. It is
used for interfacing a switch with its primary representation in a breaker IED.
XLNPROXY facilitates a common interface with the SXCBR and SXSWI
functions towards the SCSWI function, especially for command response and error
handling.
The functions Local Remote (LOCREM) and Local Remote Control
(LOCREMCTRL), to handle the local/remote switch, also belong to the apparatus
control function.
The principles of operation, function blocks, input and output signals and setting
parameters for all these functions are described below.
9.4.3
Error handling
GUID-6C31D291-74E8-46A3-8FC2-D3959C2458A5 v6
Depending on the error that occurs during the command sequence the error signal
will be set with a value. Table
describes the cause values given on local HMI.
The translation to AddCause values specified in IEC 61850-8-1 is shown in Table
. For IEC 61850-8-1 edition 2 only addcauses defined in the standard are used,
for edition 1 also a number of vendor specific causes are used. The values are
available in the command response to commands from IE C61850-8-1 clients. An
output L_CAUSE on the function block for Switch controller (SCSWI), Circuit
breaker (SXCBR) and Circuit switch (SXSWI) indicates the value of the cause
during the latest command if the function specific command evaluation has been
started. The causes that are not always reflected on the output L_CAUSE, with
description of the typical reason are listed in table
Table 154:
Values for "cause" signal
Cause
number
Name
Description
Supported
0
None
Control action successfully executed
X
1
Not-supported
Given for Cancel request with Direct Control in Ready
state
X
2
Blocked-by-
switching-hierarchy
Not successful since one of the downstream Loc
switches like in CSWI has the value TRUE
X
3
Select-failed
Cancelled due to an unsuccessful selection (select
service)
X
4
Invalid-position
Control action is aborted due to invalid switch position
(Pos in XCBR or XSWI)
X
5
Position-reached
Switch is already in the intended position (Pos in
XCBR or XSWI)
X
6
Parameter-change-
in-execution
Control action is blocked due to running parameter
change
X
7
Step-limit
Control action is blocked, because tap changer has
reached the limit (EndPosR or EndPosL in YLTC)
X
8
Blocked-by-Mode
Control action is blocked, because the LN (CSWI or
XCBR/XSWI) is in a mode (Mod) which doesn’t allow
any switching
X
Table continues on next page
Section 9
1MRK 505 384-UEN A
Control
270
Breaker protection REQ650 2.2 IEC
Technical manual
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