VLT
®
FCD Series
4. R
S
is set automatically when AMT has been com-
pleted. See parameter 107 Auto motor adaption.
109
109 Stator reactance X
S
(STATOR REACTANCE)
Value:
0.00 - X,XX
✭ Depends on choice of motor
Function:
After setting of parameters 102-106 Nameplate data,
a number of adjustments of various parameters are
made automatically, including stator reactance X
S
.
The shaft performance can be improved by fine-
tuning R
S
and X
S
, see procedure below.
Description of choice:
X
S
can be set as follows:
1. The value is stated by the motor supplier.
2. The value is obtained through manual measure-
ments X
S
is obtained by connecting a motor to
mains and measuring the phase-phase voltage
U
M
and the idle current
8
.
Xs
=
Um
p
3xI
3. Use the factory settings of X
S
which the fre-
quency converter itself chooses on the basis of
the motor nameplate data.
117
117 Resonance dampening
(RESONANCE DAMP.)
Value:
0 - 100 %
✭ 0%
Function:
Reduces the output voltage when running at low
load for avoiding resonance phenomena..
Description of choice:
If 0 is selected, there will be no reduction. If 100 %
is selected, the voltage is reduced to 50% at no load.
119
119 High start torque
(HIGH START TORQ.)
Value:
0.0 - 0.5 sec.
✭ 0.0 sec.
Function:
To ensure a high start torque approx. 1.8 x I
INV.
can
be permitted for max. 0.5 sec. The current is, how-
ever, limited by the frequency converter’s (inverter’s)
safety limit. 0 sec. corresponds to no high start
torque.
Description of choice:
Set the necessary time for which a high start torque
is required.
120
120 Start delay
(START DELAY)
Value:
0.0 - 10.0 sec.
✭ 0.0 sec.
Function:
This parameter enables a delay of the start-up time
after the conditions for start have been fulfilled.
When the time has passed, the output frequency will
start by ramping up to the reference.
Description of choice:
Set the necessary time before commencing to accel-
erate.
121
121 Start function
(START FUNCTION)
Value:
DC hold during start delay time
(DC HOLD/DELAY TIME)
[0]
DC brake during start delay time
(DC BRAKE/DELA Y TIME)
[1]
✭Coasting during start delay time
(COAST/DELA Y TIME)
[2]
Start frequency/voltage clockwise
(CLOCKWISE OPERATION)
[3]
Start frequency/voltage in reference direction
(VERTICAL OPERATION)
[4]
Function:
This is where to choose the required mode during
the start delay time (parameter 120 Start delay time).
Description of choice:
Select DC hold during start delay time [0] to ener-
gize the motor with a DC hold voltage during the
start delay time. Set voltage in parameter 137 DC
hold voltage.
Choose DC brake during start delay time [1] to ener-
gize the motor with a DC brake voltage during the
start delay time. Set voltage in parameter 132 DC
brake voltage.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.A1.02 - VLT is a registered Danfoss trade mark
59
Programming
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