VLT
®
4000 VT
Programming
Procedure for automatic motor adaptation:
1. Set the motor parameters in accordance with
the motor nameplate data given in parameters
102-106
Nameplate data
.
2. Connect 24 V DC (possibly from terminal 12)
to terminal 27 on the control card.
3. Select Automatic adaptation [1] or Automatic
adaptation with LC-filter [2] in parameter 107
Automatic motor adaptation
, AMA.
4. Start up the VLT AFD or connect terminal 18 (start)
to 24 V DC (possibly from terminal 12).
If the automatic motor adaptation is to be stopped:
1. Press the [OFF/STOP] key.
After a normal sequence, the display
reads: AMA STOP
1. The VLT AFD is now ready for operation.
If there is a fault, the display reads: ALARM 22
1. Press the [Reset] key.
2. Check for possible causes of the fault in
accor-dance with the alarm message. See
list of warnings and alarms
.
If there is a warning, the display reads:
WARNING 39-42
1. Check for possible causes of the fault in accordance
with the warning. See
list of warnings and alarms
.
2. Press the [CHANGE DATA] key and select
"Continue" if AMA is to continue despite the
warning, or press the [OFF/STOP] key to stop
the automatic motor adaptation.
108 Start voltage of parallel motors
(MULTIM.START VOLT)
Value:
0.0 - parameter 103
Motor voltage, U
M,N
✭
depends on par. 103
Motor voltage, U
M,N
Function:
This parameter specifies the start-up voltage of
the permanent VT characteristics at 0 Hz for
motors connected in parallel.
The start-up voltage represents a supplementary
voltage input to the motor. By increasing the start-up
voltage, motors connected in parallel receive a higher
start-up torque. This is used especially for small motors
(< 4.0 HP) connected in parallel, as they have a higher
stator resistance than motors above 5.5 HP. This
function is only active if
Parallel motors
[1] has been
selected in parameter 101
Torque characteristics
.
Description of choice:
Set the start-up voltage at 0 Hz. The maximum voltage
depends on parameter 103
Motor voltage, U
M,N
.
109 Resonance damping
(RESONANCE DAMP.)
Value:
0 - 500 %
✭
100 %
Function:
High-frequency electric resonance problems between
the AFD and the motor can be eliminated by
adjusting the resonance damping.
Description of choice:
Adjust the damping percentage until the motor
resonance has disappeared.
110 High break-away torque
(HIGH START TORQ.)
Value:
0.0 - 0.5 sec.
✭
0.0 sec.
Function:
In order to secure a high starting torque, the maximum
torque for max. 0.5 sec. is allowed. However, the
current is limited by the protection limit of the AFD.
0 sec. corresponds to no high break-away torque.
Description of choice:
Set the necessary time in which a high starting
torque is desired.
111 Start delay
(START DELAY)
Value:
0.0 - 120.0 sec.
✭
0.0 sec.
Function:
This parameter enables a delay of the starting time
after the conditions for start have been fulfilled.
MG.40.A7.22 - VLT is a registered Danfoss trademark
71