BONFIGLIOLI active cube 201, Operating Instructions Manual

Page: 163 / 285

12/16 Operating Instructions ACU 163
15.9 Blocking frequencies
In certain applications, it is necessary to fade out reference frequencies. In this way, resonance
points of the system as stationary operating points are avoided. Parameters
1st Blocking Frequency
447 and
2nd Blocking Frequency
448 with parameter
Frequency Hysteresis
449 define two
resonance points.
A blocking frequency is active if the parameter values of the blocking frequency and the frequency
hysteresis are not equal to 0.00 Hz.
The area faded out as a stationary working point by the hysteresis is passed through as quickly as
possible according to the ramp set. If the output frequency is limited as a result of the selected
control parameter settings, e.g. if the current limit is reached, the hysteresis is passed through with
a delay. The behavior of the reference value can be determined from its direction of movement
according to the following diagram.
Parameter Setting
No. Description Min. Max. Factory setting
447 1. Block frequency 0.00 Hz 599.00 Hz 0.00 Hz
448 2. Block frequency 0.00 Hz 599.00 Hz 0.00 Hz
449 Frequency hysteresis 0.00 Hz 100.00 Hz 0.00 Hz
internal
reference value
reference value output
f
block
hysteresis hysteresis
f +hysteresis
block
f -hysteresis
block