VLT® 7000 Booster
of whether all motor phases have been connected. The
following must be noted when the AMA function is used:
-
For AMA to be able to determine the motor
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
pump no. 1. After finalised AMA the
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
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 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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