VLT® 7000 Booster
of whether all motor phases have been connected. The
following must be noted when the AMA function is used:
- ForAMAtobeabletodeterminethemotor
parameters optimally, the correct nameplate data
for the motor connected to the frequency converter
must be entered in parameters 102 to 106.
- The duration of a total automatic motor adaptation
varies from a few minutes to approx. 10 minutes
for small motors, depending on the rating of
the motor used (the time for a 7.5 kW motor,
for example, is approx. 4 minutes).
- Alarms and warnings will be shown in the display
if faults occur during motor adaptation.
- AMA can only be carried out if the rated motor
current of the motor is min. 35% of the rated
output current of the frequency converter.
- If automatic motor adaptation is to be discontinued,
press the [OFF/STOP] key.
NB!:
AMA is not allowed on motors connected
in parallel. AMA is only carried out on
pumpno.1.AfterfinalisedAMAthe
system will start up immediately.
Description of choice:
Select Automatic adaptation [1] if the frequency
converter is to carry out a complete automatic
motor adaptation.
Select Automatic adaptation with LC-filter [2] if a
LC-filter has been placed between the frequency
converter and the motor.
Procedure for automatic motor adaptation:
1. Set the motor parameters in accordance with
themotornameplatedatagiveninparameters
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 frequency converter or connect terminal
18 (start) to 24 V DC (possibly from terminal 12).
5. After a normal sequence, the display reads: AMA
STOP. After a reset, the frequency converter will
be ready to start operation again.
If the automatic motor adaptation is to be stopped:
1. Press the [OFF/STOP] key.
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 kW) connected in parallel, as they have a higher
stator resistance than motors above 5.5 kW.
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 frequency converter and the motor can be
eliminated by adjusting the resonance damping.
Description of choice:
Adjust the damping percentage until the motor
resonance has disappeared.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.70.A1.02 - VLT is a registered Danfoss trademark
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General