BONFIGLIOLI ACTIVE Cube ACU 201-01, Руководство по эксплуатации, Страница: 213 / 292

Operation mode power failure regulation.
Voltage controller: Parameter
Operation mode
670 = 2
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
671. If a mains failure is detected, the controller
tries to regulate the DC link voltage to the value set with parameter
Reference Mains
Support Value
672. To that end, the output frequency is continuously reduced and
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
683.
Gen. Ref. Current Limit
683 is active in configurations 410 and 610 (FOC and SERVO).
The threshold values of the voltage controller are calculated starting with the current
DC link voltage with the parameters
Mains failure threshold
671 and
Reference
mains support value
672.
Output signals
Digital signals indicate mains failure and power failure regulation.
179 - Mains failure
1)
Mains failure and power failure regulation – selected via
Operation Mode
670 of the voltage controller.
13 - Mains failure
2)
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
Acceleration on mains resumption
674. If the value of 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 for the ramp
parameters
Acceleration (clockwise)
420 or
Acceleration (anticlockwise)
422.
06/13 Operating Instructions ACU 213