NOTE
It is important to enter the correct value,
since this forms part of the VVC
plus
control
feature. The max. value equals f
M,N
x 60.
Set f
M,N
in parameter 104.
NOTE
If the setting in parameter 102-109 is
changed, the parameters 110-118 will re-
turn to factory setting. If using special mo-
tor characteristics a change in parameter
102-109 affects parameter 422.
107 Automatic motor adaptation, AMA
(AUTO MOTOR ADAPT)
Value:
Adaptation off (OFF) [0]
Adaptation on, R
S
and X
S
(ENABLE (RS,XS))
[1]
Adaptation on, R
S
(ENABLE (RS))
[2]
Function:
If this function is used, the adjustable frequency drive
automatically sets the necessary control parameters
(parameters 108/109) with the motor stationary. Auto-
matic motor adaptation ensures optimum use of the
motor.
For the best possible adaptation of the adjustable fre-
quency drive, it is recommended to run AMA on a cold
motor.
The AMA function is activated by pressing the
[START] key after selecting [1] or [2].
See also section Automatic motor adaptation.
The section Automatic motor adaption, AMA, via VLT
software dialog shows how automatic motor adaptation
can be activated by means of VLT Software Dialog.
After a normal sequence, the display will read "ALARM
21". Press the [STOP/RESET] key. The adjustable
frequency drive is now ready for operation.
Description of choice:
Select Enable, R
S
and X
S
[1] if the adjustable frequency
drive is to be able to carry out automatic motor adap-
tation of both the stator resistance R
S
and the stator
reactance X
S
.
Select Optimisation on, R
S
[2] if a reduced test is to be
carried out, in which only the ohmic resistance in the
system is determined.
NOTE
It is important to set motor parameters
102-106 correctly, since these form part of
the AMA algorithm. In most applications,
correct entering of motor parameters
102-106 is sufficient. For optimum dynam-
ic motor adaptation, an AMA must be car-
ried out.
Motor adaptation may take up to 10 mi-
nutes, depending on the output of the mo-
tor in question.
NOTE
There must not be any externally gener-
ating torque during automatic motor adap-
tation.
NOTE
If the setting in parameter 102-109 is
changed, the parameters 110-118 will re-
turn to factory setting. If using special mo-
tor characteristics a change in parameter
102-109 affects parameter 422.
108 Stator resistor (STATOR RESIST)
Value:
Depends on the choice of motor
Function:
After setting motor data in parameters 102-106, a
number of adjustments of various parameters are
made automatically, including the stator resistance
R
S
. A manually entered R
S
must apply to a cold motor.
The shaft performance can be improved by fine-tuning
R
S
and X
S
, see procedure below.
Description of choice:
R
S
can be set as follows:
1. Automatic motor adaptation, where the ad-
justable frequency drive measures on the
motor to determine the value. All compensa-
tions are reset to 100%.
VLT
®
5000 Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
MG.51.C5.22 - VLT
p
is a registered Danfoss trademark. 91
Programming
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