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 SXSWI 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.
Time diagrams
M16494-26 v6
There are two timers for supervising of the execute phase,
tStartMove
and
tIntermediate
.
tStartMove
supervises that the primary device starts moving after the execute output pulse is
sent.
tIntermediate
defines the maximum allowed time for intermediate position. Figure 451
explains these two timers during the execute phase.
EXE_CL
tStartMove timer
OPENPOS
CLOSEPOS
tIntermediate timer
t1
t2
tStartMove
tIntermediate
if t1 > tStartMove then
"switch-not-start-moving"
attribute in 'cause' is set
if t2 > tIntermediate then
"persisting-intermediate-state"
attribute in 'cause' is set
Close pulse duration
AdaptivePulse = TRUE
en05000097.vsd
IEC05000097 V1 EN-US
Figure 451: The timers tStartMove and tIntermediate
The timers
tOpenPulse
and
tClosePulse
are the length of the execute output pulses to be sent to
the primary equipment. Note that the output pulses for open and close command can have
different pulse lengths. The pulses can also be set to be adaptive with the configuration
parameter
AdaptivePulse
. Figure 452 shows the principle of the execute output pulse. The
AdaptivePulse
parameter will have effect on both execute output pulses.
Section 14 1MRK 502 066-UUS B
Control
854
Technical manual
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