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VLT
®
6000 HVAC Series
Programming
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.
110 High break-away torque
(HIGH START TORQ.)
Value:
0.0 (OFF) - 0.5 sec.
✭
OFF
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
frequency converter (inverter). 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.
When the time has passed, the output frequency
will start by ramping up to the reference.
Description of choice:
Set the desired time until acceleration is to begin.
112 Motor preheater
(MOTOR PREHEAT)
Value:
✭
Disable (DISABLE)
[0]
Enable (ENABLE)
[1]
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.61.A5.02 - VLT is a registered Danfoss trademark
89