Danfoss VLT 5000 FLUX, Operating Instructions Manual, Page: 75 / 158

VLT
®
5000 FLUX
Programming
130 Start speed
(START SPEED)
Value:
0.0 - 600 rpm
✭
0.0 rpm
Function:
This parameter allows setting of the output speed
at which the motor is to start.
The output speed ’ leaps ’ to the set value. This
parameter can be used e.g. for hoist applications
(cone armature motors).
Description of choice:
Set the desired start speed.
It is assumed that the start function in parameter
121 has been set to [3], [4] or [5] and that a start
delay time has been set in parameter 120; also,
a reference signal must be present.
131 Initial current
(INITIAL CURRENT)
Value:
0.0 - parameter 105
✭
0.0 Amp
Function:
Some motors, such as cone rotor motors, need
extra current/starting speed (boost) when starting
to disengage the mechanical brake.
For this purpose use parameter 130/131.
Description of choice:
Set the desired value required to disengage
the mechanical brake.
It is assumed that the start function in parameter
121 has been set to [3] or [4] and that a start
delay time has been set in parameter 120; also,
a reference signal must be present.
■
Additional Motor Parameters
The motor data in parameter 150-158 must be
matching the specific motor, in order for the motor to
run properly. Factory settings are figures based on
common motor parameter values from normal standard
motors. If the motor parameters are not set correctly,
it may cause a malfunction of the drive system.
If the motor data is not known it is recommended
to perform an AMA (Automatic Motor Adaptation).
See section Automatic Motor Adaptation . The AMA
sequence will adjust all motor parameters except
the moment of inertia of the rotor.
Motor equivalent diagram for an asyn-
chronous motor:
NB!:
If the settings in parameters 102-106 are
changed, parameters 150-158 will return
to factory default settings.
150 Stator resistance
(STATOR RESIST)
Value:
Ohm
✭
Depends on unit
Function:
Sets the value of the motor stator resistance
for the Flux Vector control.
151 Rotor resistance
(ROTOR RESIST)
Value:
Ohm
✭
Depends on unit
Function:
A manually entered Rotor resistance, R
2
’ must
apply to a cold motor.
Shaft performance can be improved by fine-tuning R
2
’ .
Description of choice:
R
2
’ can be set as follows:
1. Automatic Motor Adaptation, where the frequency
converter measures on the motor to determine the
value. All compensations are reset to 100%.
2. The motor supplier states the value.
3. The factory settings of R
2
’ , selected by the
frequency converter itself on the basis of the
motor nameplate data, is used.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.55.A6.02 - VLT is a registered Danfoss trademark
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