BONFIGLIOLI ACTIVE CUBE 201 Operating Instructions Manual page 218

Operation Mode Liquid Level 2, Parameter Operation Mode 440 = 3
This operation mode can be used, for example, for Liquid Level control.
The minimum value monitoring prevents an acceleration of the drive if the actual value is missing.
If the actual value is missing (< 0.5%) the output frequency is guided to the 441.
Fixed Frequency
This is done using the set 421.
Deceleration (Clockwise)
If there is no control deviation (actual value =reference value) or if the control deviation is negative
(actual value>reference value), the output frequency is guided to 418. This is
Minimum Frequency
done using the selected controller settings. In addition, the ramp is limited
by Deceleration
421. If 418 = 0, the output stage will be turned off in this case.
(Clockwise) Minimum Frequency
The drive accelerates as soon as an actual value is present again or the control deviation exceeds
the positive 443. The drive stops if actual value ≥ setpoint, the controller output has
Hysteresis
reached 0 Hz and 418 = 0.
Minimum Frequency
218 Operating Instructions ACU 12/16