Danfoss VLT Decentral FCD 300 Operating Instructions Manual page 47

3 Programming
Description of choice:
Select Optimisation on [2] if you want the frequency converter to perform
automatic motor tuning.
108 Stator resistance R
Value:
0.000 - X.XXX Ω
3 Function:
After setting of parameters 102-106
justments of various parameters is carried out automatically, including
stator resistance R . A manually entered R
S
The shaft performance can be improved by fine-tuning R
procedure below.
NB!
Parameters 108
reactance X
plate data has been set.
Description of choice:
R can be set as follows:
S
1. Use the factory settings of R
itself chooses on the basis of the motor nameplate data.
2. The value is stated by the motor supplier.
3. The value is obtained through manual measurements: R
calculated by measuring the resistance R
phase terminals. R
4. R is set automatically when AMT has been completed. See pa-
S
rameter 107 Auto motor adaption.
Stator reactance X
109
Value:
0.00 - X,XX Ω
Function:
After setting of parameters 102-106
justments of various parameters are made automatically, including stator
reactance X . The shaft performance can be improved by fine-tuning R
S
and X , see procedure below.
S
Description of choice:
X can be set as follows:
S
1. The value is stated by the motor supplier.
2. The value is obtained through manual measurements X
tained by connecting a motor to mains and measuring the
phase-phase voltage U
U M
X s =
3 × I
ϕ
X : See parameter 142.
L
3. Use the factory settings of X
self chooses on the basis of the motor nameplate data.
117 Resonance dampening
Value:
0 - 100 %
44
S
Depends on choice of motor
Nameplate data,
a number of ad-
must apply to a cold motor.
S
and X
S
Stator resistance R
and 109
S
are normally not to be changed if name-
S
which the frequency converter
S
S
between two
PHASE-PHASE
= 0.5 x R .
S PHASE-PHASE
S
Depends on choice of motor
Nameplate data
, a number of ad-
and the idle current .
M φ
X L
−
2
which the frequency converter it-
S
MG.04.B8.02 - VLT is a registered Danfoss trademark
Function:
Reduces the output voltage when running at low load for avoiding reso-
nance phenomena.
Description of choice:
If 0 is selected, there will be no reduction. If 100 % is selected, the volt-
age is reduced to 50% at no load.
119 High start torque
Value:
0.0 - 0.5 sec.
Function:
, see
To ensure a high start torque approx. 1.8 x I
S
0.5 sec. The current is, however, limited by the frequency converter's
(inverter's) safety limit. 0 sec. corresponds to no high start torque.
Stator
Description of choice:
Set the necessary time for which a high start torque is required.
120 Start delay
Value:
0.0 - 10.0 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 fre-
quency will start by ramping up to the reference.
can be
Description of choice:
Set the necessary time before commencing to accelerate.
121 Start function
Value:
DC hold during start delay time
(DC HOLD/DELAY TIME)
DC brake during start delay time
(DC BRAKE/DELAY TIME)
Coasting during start delay time
(COAST/DELAY TIME)
Start frequency/voltage clockwise
S
(CLOCKWISE OPERATION)
Start frequency/voltage in reference direction
(VERTICAL OPERATION)
Function:
This is where to choose the required mode during the start delay time
(parameter 120 Start delay time
is ob-
S
Description of choice:
DC hold during start delay time
Select
DC hold voltage during the start delay time. Set voltage in parameter 137
DC hold voltage
.
DC brake during start delay time
Choose
a DC brake voltage during the start delay time. Set voltage in parameter
132 DC brake voltage .
Coasting during start delay time
Choose
controlled by the adjustable frequency drive during the start delay time
(inverter turned off).
Start frequency/voltage clockwise
Choose
0 %
scribed in parameter 130
start delay time. Regardless of the value assumed by the reference signal,
the output frequency equals the setting in parameter 130
VLT® Decentral FCD
can be permitted for max.
INV.
).
[0] to energize the motor with a
[1] to energize the motor with
[2] and the motor will not be
[3] to obtain the function de-
Start frequency and 131 Voltage at start
Start frequen-
0.0 sec.
0.0 sec.
[0]
[1]
[2]
[3]
[4]
during