VLT
®
6000 HVAC
83
MG.60.B1.02 - VLT is a registered Danfoss trade mark
★
= factory setting. ( ) = display text [ ] = value for use in communication via serial communication port
Programming
104 Motor frequency, f
M,N
(MOTOR FREQUENCY)
Value:
★
50 Hz (50 Hz)
[50]
60 Hz (60 Hz)
[60]
Function:
This is where the rated motor frequency f
M,N
is
selected.
Description of choice:
Select a value that equals the nameplate data on the
motor.
Furthermore, it is also possible to set the value for
motor frequency infinitely variably in the 24-1000 Hz
range.
105 Motor current, I
M,N
(MOTOR CURRENT)
Value:
0.01 - I
VLT,MAX
A
★
Depends on the choice of motor.
Function:
The rated motor current I
M,N
forms part of the VLT
frequency converter calculations i.a. of torque and
motor thermal protection. Set the motor current I
VLT,N
,
taking into account the star Y or delta
∆
connected
motor.
Description of choice:
Set a value that equals the nameplate data on the
motor.
NB!
It is important to enter the correct value, since
this forms part of the V V C
PLUS
control feature.
106 Rated motor speed, n
M,N
(MOTOR NOM. SPEED)
Value:
100 - f
M,N
x 60 (max. 60000 rpm)
✭
Depends on parameter 102
Motor power, P
M,N
.
Function:
This is where the value is set that corresponds to the
rated motor speed n
M,N
, which can be seen from the
nameplate data.
Description of choice:
Choose a value that corresponds to the motor
nameplate data.
NB!
It is important to set the correct value, since
this forms part of the V V C
PLUS
control feature.
The max. value equals f
M,N
x 60.
f
M,N
is set in parameter 104
Motor frequency, f
M,N
.
107 Automatic motor adaptation, AMA
(AUTO MOTOR ADAPT)
Value:
★
Optimisation disable (NO AMA)
[0]
Automatic adaptation (RUN AMA)
[1]
Automatic adaptation with LC-filter
(RUN AMA WITH LC-FILT)
[2]
Function:
Automatic motor adaptation is a test algorithm that
measures the electrical motor parameters at motor
standstill. This means that AMA itself does not supply
any torque.
AMA is useful when commissioning systems, where
the user wants to optimise the adjustment of the VLT
frequency converter to the motor applied. This feature
is used in particular where the factory setting does
not adequately cover the motor in question.
For the best adjustment of the VLT frequency conver-
ter, it is recommended to carry out AMA on a cold
motor.
It must be noted that repeated AMA runs may lead to
a heating of the motor that will result in an increase of
the stator resistance R
S
. However, this is not normally
critical.
