Technical documentation
Rev. 02
Reactive Factor Controller CX plus
76
18 Control algorithm
5 different control algorithms are available in the CX plus. The control algorithm used by the controller
can be set in the SETUP menu 311:
1 = BEST FIT (default)
2 = LIFO
3 = COMBI FILTER
4 = PROGRESSIVE
5 = FIFO
18.1 BEST FIT (AUTO)
The controller works according to the
"BEST FIT"
principle (best result). This means that, before each
switching operation, the controller compares all step sizes saved in its step database with the
determined need for reactive power and always selects the step which comes closest to the set
control target. If the controller has connected steps of the same size, the number of switching
operations is distributed automatically to these steps either via the switching cycles or via the
operating hours (SETUP/315).
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 skipped.
If steps which have been identified as defective are not locked, the function “
Lock faulty steps
”
(SETUP/309) must be deactivated. Otherwise, the affected step will be switched on and off
unnecessarily.
