Schrack Technik CX plus Series FRACXP06R-, Руководство пользователя

Страница: 70 / 80

70
LIFO
“Last In, First Out”
: The controller starts with stage 1 and switches on the stage of the next higher
number each time, if necessary. The stages are switched off in reversed order. It is checked individually
for each stage, if the switching operation is useful. This may lead to an unprecise compensation in case
of stages of different sizes. Blocked defective stages (
“FAULTY”
) and stages with the stage type
“
FON
”
and
“
FOFF
” are skipped by the control. If a stage is identified as defective and blocked ( “FAULTY”
)
after being switched on 3 times, this stage will be skipped by the control. Stages which have been
switched off by the alarm system via the stage switch-off sequence and have been locked for max. 30
min. are also not available for the control.
!
CAUTION
If the setting
“Lock faulty stages” (SETUP/309) is deactivated, stages which are identified as defective
are not blocked anymore. Their stage type remains set to
“AUTO”. Therefore, the defective stage is
not skipped.
The control continuously switches the defective stages on and immediately off again unnecessarily
in the cycle of the switching time. The control oscillates. The next faultless stages are ignored for
switch-on, because the defective stage is not blocked and thus not skipped. Therefore, it may not be
possible for the control to reach the target COS-PHI. The switch-off of the stages is not affected by
this.
NOTE: The stage exchange function and the switching distribution (switching cycles or operating hours)
are always deactivated in case of stages of the same size.
NOTE: It is not possible to switch the stages manually.
C
OMBI FILTER
Special algorithm for combi filter systems with two different degrees of choking. Like in case of the
“BEST-FIT”
algorithm, the controller works according to the
“BEST-FIT”
principle. The difference is
that the controller always has switched on more or the same compensation power which is connected
at the odd switching outputs than / as is connected at the even outputs. Already switched on stage
powers by FON stages are not considered by the control.
Blocked defective stages (
“FAULTY”
) and stages with the stage type
“
FON
” and “
FOFF
” are skipped
by the control. If a stage is identified as defective and blocked (
“FAULTY”
) after being switched on 3
times, this stage will be skipped by the control. Stages which have been switched off by the alarm
system via the stage switch-off sequence and have been locked for max. 30 min. are also skipped.
If stages which have been identified as defective are not locked, the function
“
Lock faulty stages
”
(SETUP/309) must be deactivated. Otherwise, the affected stage will be switched on and off
unnecessarily.
!
CAUTION
The defective stage is switched on and immediately switched off again. If the control target has not
been reached yet, the affected stage is continuously switched on and immediately off again in the
cycle of the switching time. The control oscillates.
The combi filter algorithm only works with capacitive stages.
If the stage recognition is executed for the first time, more stage power may be switched on at the
even switching outputs than at the odd ones. Enter the stage sizes manually (SETUP/402) in order
to avoid this.
Attention is required by defining FON stages. By setting FON stages, more stage power may be
switched on at the even switching outputs than at the odd ones.
NOTE: The stage exchange function and the switching distribution (switching cycles or operating hours)
are always deactivated in case of stages of the same size.
NOTE: It is not possible to switch the stages manually.