VLT
®
FCD Series
on the motor speed. The FF factor provides high dy-
namism when changing the set point and less
overswing.
Description of choice:
The required % value can be selected in the interval
f
MIN
- f
MAX
. Values over 100 % are used if the set
point variations are only small.
452
452 Controller range
(PID CONTR. RANGE)
Value:
0 - 200 %
✭
10 %
Function:
This parameter is only active if in parameter 100
Configuration
the selection made is
Speed regula-
tion, closed loop
.
The controller range (bandwidth) limits the output
from the PID controller as a % of motor frequency
f
M,N
.
Description of choice:
The required % value can be selected for motor fre-
quency f
M,N
. If the controller range is reduced the
speed variations will be less during initial tuning.
456
456 Brake Voltage Reduce
(BRAKE VOL REDUCE)
Value:
0 - 50 V
✭
0
Function:
The user sets the voltage by which the level for
resistor braking is reduced. It is only active when re-
sistor in parameter 400 is selected.
Description of choice:
The greater the reduction value, the faster the reac-
tion to a generator overload. Should only be used if
there are problems with overvoltage in the intermedi-
ate circuit.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.A1.02 - VLT is a registered Danfoss trade mark
93
Programming
