Technical documentation
Rev. 02
Reactive Factor Controller CX plus
77
!
CAUTION
The defective step is switched on and immediately switched off again. If the control target has not
been reached yet, the affected step is continuously switched on and immediately switched off
again in the cycle of the switching time. The control hunts.
!
CAUTION
A faultless step may be switched on and off alternatingly with a defective step. The control hunts.
18.2 LIFO
“Last In, First Out”
: The controller starts with step 1 and switches on the step of the next higher
number each time, if necessary. The steps are switched off in reversed order. It is checked individually
for each step, if the switching operation is useful. This may lead to an unprecise compensation in case
of steps of different sizes. Blocked defective steps (
“FAULTY”
) and
steps with the step type “
FON
”
and
“
FOFF
” are skipped by the control. If a step is identified as defective and blocked (
“FAULTY”
)
after being switched on 3 times, this step will be skipped by the control. Steps which have been
switched off by the alarm system via the step switch-off sequence and have been locked for max. 30
min. are also not available for the control.
!
CAUTION
If the setting “Lock faulty steps” (SETUP/309) is deactivated, steps which are identified as
defective are not blocked anymore. Their step type remains set
to “AUTO”. Therefore, the
defective step is not skipped.
The control continuously switches the defective steps on and immediately off again unnecessarily
in the cycle of the switching time. The control hunts. The next faultless steps are ignored for
switch-on, because the defective step 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 steps is not affected
by this.
NOTE:
The step exchange function and the switching distribution (switching cycles or operating hours)
are always deactivated in case of steps of the same size.
NOTE:
It is not possible to switch the steps manually.
18.3 Combi 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 step
powers by FON steps are not considered by the control.
Blocked defective steps (
“FAULTY”
)
and steps with the step type “
FON
” and “
FOFF
” are skipped by
the control. If a step is identified as defective and blocked (
“FAULTY”
) after being switched on 3
