Operating Instructions ACTIVE 06/07160
160 Operating Instructions ACTIVE 06/07
If the voltage exceeds the value set by the parameter
Reference DC-Link Limitation
680, the deceleration is reduced in such a way that the DC link voltage is regulated to
the set value. If the DC link voltage cannot be regulated to the set reference value by
the reduction of the deceleration, the deceleration is stopped and the output fre-
quency raised. The output frequency is calculated by addition of the parameter value
Max. Frequency Rise 681 to the frequency at the operating point of the controller
intervention.
Parameter Settings
No. Description ACT Min. Max. Fact. sett.
201 225 387.5 380
680 Reference DC-Link Limitation
401 425 775 760
681 Max. Frequency Rise 0.00 Hz 999.99 Hz 10.00 Hz
Operation mode mains failure regulation.
Voltage controller: Parameter
Operation Mode
670 = 2
Ud, f
f
671
672
Mains voltage
Standard ramp
or 674
Resumption of power
Power failure
t
U
d
Gradient limited
by 673 or 683
With the mains failure regulation, short-term mains failures can be bridged. A mains
failure is recognized if the DC link voltage has fallen below the set value of the pa-
rameter
Mains Failure Threshold 671. If a mains failure is recognized, the controller
tries to regulate the DC link voltage to the value set with the parameter
Reference
Mains Support Value
672. For this, the output frequency is continuously reduced and
the motor with its rotating masses put into generator operation. The reduction of the
output frequency is done according to the configuration with a maximum of the cur-
rent set by the parameter
Gen. Ref. Current Limit 683 or the ramp Mains Support
Deceleration
673.
The threshold values of the voltage controller are calculated starting with the current
DC link voltage leading from the parameters
Mains Failure Threshold 671 and Refer-
ence Mains support Value
672.
If the mains voltage is restored before a switch-off is effected by the mains undervolt-
age 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.
To Next Page
Loading...
Need help?
General
