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 Fixed Frequency 441.
This is done using the set Deceleration (Clockwise) 421.
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 Minimum Frequency 418. This is
done using the selected controller settings. In addition, the ramp is limited by Deceleration
(Clockwise) 421. If Minimum Frequency 418 = 0, the output stage will be turned off in this case.
The drive accelerates as soon as an actual value is present again or the control deviation exceeds
the positive Hysteresis 443. The drive stops if actual value ≥ setpoint, the controller output has
reached 0 Hz and Minimum Frequency 418 = 0.
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