Start Delay; Flying Start - Danfoss VLT HVACDrive Instruction Manual

7 How to Program the Adjustable Frequency
Drive
1-29 Automatic Motor Adaptation (AMA)
Option:
[0] * Off
[1] Enable complete AMA
[2] Enable reduced AMA
Activate the AMA function by pressing [Hand on] after selecting [1] or [2]. See also the item
normal sequence, the display will read: "Press [OK] to finish AMA". After pressing the [OK] key, the adjustable frequency drive is ready for operation.
NOTE:
• For the best adaptation of the adjustable frequency drive, run AMA on a cold motor
• AMA cannot be performed while the motor is running.
7
NOTE!
It is important to set motor par. 1-2* Motor Data correctly, since these form part of the AMA algorithm. An AMA must be performed
to achieve optimum dynamic motor performance. It may take up to 10 min., depending on the motor power rating.
NOTE!
Avoid generating external torque during AMA.
NOTE!
If one of the settings in par. 1-2* Motor Data is changed, par. 1-30
motor parameters, will return to the default setting.
This parameter cannot be adjusted while the motor is running.
NOTE!
Full AMA should be run without filter only while reduced AMA should be run with filter.
Application Examples > Automatic Motor Adaptation
See section:

1-71 Start Delay

Range:
0.0 s* [0.0 - 120.0 s]

1-73 Flying Start

Option:
7-16
Function:
The AMA function optimizes dynamic motor performance by automatically optimizing the advanced
motor parameters par. 1-30 Stator Resistance (Rs)
motor is stationary.
No function
performs AMA of the stator resistance R
the rotor leakage reactance X and the main reactance X
2
Performs a reduced AMA of the stator resistance R
filter is used between the adjustable frequency drive and the motor.
Stator Resistance (Rs)
in the Design Guide.
Function:
Function at Stop
The function selected in par. 1-80
Enter the time delay required before commencing acceleration.
Function:
This function makes it possible to catch a motor that is spinning freely due to a line drop-out.
MG.11.AB.22 - VLT ® is a registered Danfoss trademark
VLT ® HVAC Drive Instruction Manual
to par. 1-35 Main Reactance (Xh)
, the rotor resistance R , the stator leakage reactance X
S r
.
h
in the system only. Select this option if an LC
s
Automatic Motor Adaptation
in the Design Guide. After a
to par. 1-39 Motor Poles
is active in the delay period.
) while the
,
1
, the advanced