BONFIGLIOLI ACTIVE CUBE 201 Operating Instructions Manual page 209

If the mains voltage is restored before a switch-off is effected by the mains undervoltage detection
system, the drive is accelerated to its reference frequency at the set acceleration or according to
parameter Acceleration on Mains Resumption
674 is set to the default value of 0.00 Hz/s, the drive is accelerated at the values set
Resumption
for the ramp parameters
Parameter
No. Description
671 Mains failure threshold
672 Reference mains support value
The frequency inverter reacts to the signals at the control inputs both when the power
failure regulation is switched on and in normal operation. A control via externally
supplied control signals is only possible in the case of a no-break supply. As an
alternative, supply of the control signals through the frequency inverter is to be used.
Operation mode power failure regulation
The DC link voltage which is available in the case of a power failure is supplied by the motor. The
output frequency is continuously reduced and the motor with its rotating masses is switched over to
generator operation. The reduction of the output frequency is done at a current not exceeding the
maximum set with parameter
673.
Mains Support Deceleration
675.
Shutdown Threshold
12/16
674. If the value of parameter
Acceleration (Clockwise)
Min.
-200.0 V
-200.0 V
Gen. Ref. Current Limit
673 is active only if the actual frequency is lower than the
Operating Instructions ACU
420 or
Acceleration Anticlockwise
Setting
Max.
-50.0 V
-10.0 V
683 or the ramp
Mains Support Deceleration
Acceleration on Mains
422 .
Factory setting
-100.0 V
-40.0 V
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