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If the voltage exceeds the value set by the parameter
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
intervention.
No.
680 Reference DC-Link Limitation
681 Max. Frequency Rise
Operation mode mains failure regulation.
Voltage controller: Parameter
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
tries to regulate the DC link voltage to the value set with the parameter
Mains Support Value
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
Deceleration
The threshold values of the voltage controller are calculated starting with the current
DC link voltage leading from the parameters
ence Mains support Value
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
the value of parameter
value of 0.00 Hz/s, the drive is accelerated at the values set for the ramp parameters
Acceleration (Clockwise)
160
160
681 to the frequency at the operating point of the controller
Parameter
Description
Ud, f
U
d
672
671
f
Mains voltage
Mains Failure Threshold
672. For this, the output frequency is continuously reduced and
673.
Acceleration on Mains Resumption
420 or
Operating Instructions ACTIVE
Operating Instructions ACTIVE
ACT
201
401
0.00 Hz
Operation Mode
670 = 2
Gradient limited
by 673 or 683
Power failure
671. If a mains failure is recognized, the controller
Gen. Ref. Current Limit
Mains Failure Threshold
672.
Acceleration on Mains Resumption
Acceleration Anticlockwise
Reference DC-Link Limitation
Settings
Min.
Max.
225
387.5
425
775
999.99 Hz
Standard ramp
or 674
Resumption of power
Mains Support
683 or the ramp
671 and
674 is set to the default
422.
Fact. sett.
380
760
10.00 Hz
t
Reference
Refer-
674. If
06/07
06/07
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Questions and answers
My inverter has FC08 meaning 24v missing or not detect and I cannot get that alarm to go away or to the parameters , this came up after I try to copy and paste parameters from another working inverter