BONFIGLIOLI ACTIVE Cube ACU 201-01 Operating Instructions Manual page 213

Operation mode power failure regulation.
Voltage controller: Parameter
With the power failure regulation, short-term power failures can be bridged. Mains
failure is detected when the DC link voltage has dropped below the set value of pa-
rameter
Mains Failure Threshold
tries to regulate the DC link voltage to the value set with parameter
Support Value
the motor with its rotating masses is switched over to generator operation. Using
field oriented Control (FOC, SERVO) the reduction of the output frequency is done
according to the configuration with a maximum of the current set by the parameter
Gen. Ref. Current Limit
Gen. Ref. Current Limit
The threshold values of the voltage controller are calculated starting with the current
DC link voltage with the parameters
mains support value
Output signals
Digital signals indicate mains failure and power failure regulation.
179 - Mains failure
13 - Mains failure
1)
For linking with inverter functions
2)
For digital output
If the mains voltage is restored before a switch-off is affected by the mains un-
dervoltage detection system, the drive is accelerated to its reference frequency at the
set acceleration or according to the parameter
674. If the value of parameter
default value of 0.00 Hz/s, the drive is accelerated at the values set for the ramp
parameters
Operating Instructions ACU
06/13
Operation mode
671. If a mains failure is detected, the controller
672. To that end, the output frequency is continuously reduced and
683.
683 is active in configurations 410 and 610 (FOC and SERVO).
672.
1)
Mains failure and power failure regulation – selected via
2)
Operation Mode
Acceleration on mains resumption
Acceleration (clockwise)
670 = 2
Mains failure threshold
670 of the voltage controller.
Acceleration on mains resumption
420 or
Acceleration (anticlockwise)
Reference Mains
671 and
Reference
674 is set to the
422.
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