Danfoss VLT 5000 Series, Instruction Manual, Page: 94 / 240

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
Progra
mming