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4 Electrical Installation
1.
Par. 1-20
Par. 1-21
2.
Par. 1-22
3.
Par. 1-23
4.
Par. 1-24
5.
Par. 1-25
Step 3. Activate the Automatic Motor Adaptation (AMA)
Performing an AMA will ensure optimum performance. The
AMA measures the values from the motor model equivalent
4
diagram.
1.
Connect terminal 37 to terminal 12 (if terminal 37 is available).
2.
Connect terminal 27 to terminal 12 or set par. 5-12
27 Digital Input to 'No function' (par. 5-12 Terminal 27 Digital
Input [0])
3.
Activate the AMA par. 1-29
(AMA) .
4.
Choose between complete or reduced AMA. If a Sine-wave fil-
ter is mounted, run only the reduced AMA, or remove the
Sine-wave filter during the AMA procedure.
5.
Press the [OK] key. The display shows "Press [Hand on] to
start".
6.
Press the [Hand on] key. A progress bar indicates if the AMA
is in progress.
Stop the AMA during operation
1.
Press the [OFF] key - the frequency converter enters into
alarm mode and the display shows that the AMA was termina-
ted by the user.
Successful AMA
1.
The display shows "Press [OK] to finish AMA".
2.
Press the [OK] key to exit the AMA state.
4.5 Additional Connections
4.5.1 Mechanical Brake Control
In hoisting/lowering applications, it is necessary to be able to
control an electro-mechanical brake:
•
Control the brake using any relay output or digital output (ter-
minal 27 or 29).
•
Keep the output closed (voltage-free) as long as the frequency
converter is unable to 'support' the motor, for example due to
the load being too heavy.
Mechanical brake control [32] in parameter group 5-4*
•
Select
for applications with an electro-mechanical brake.
4.5.2 Parallel Connection of Motors
The frequency converter can control several parallel-connected motors.
The total current consumption of the motors must not exceed the rated
output current I
for the frequency converter.
M,N
80
Motor Power [kW]
Motor Power [HP]
Motor Voltage
Motor Frequency
Motor Current
Motor Nominal Speed
Automatic Motor Adaptation
MG.11.F3.02 - VLT
VLT HVAC Drive High Power Operating In-
Unsuccessful AMA
1.
The frequency converter enters into alarm mode. A description
of the alarm can be found in the
ter.
2.
"Report Value" in the [Alarm Log] shows the last measuring
sequence carried out by the AMA, before the frequency
converter entered alarm mode. This number along with the
description of the alarm will assist you in troubleshooting. If
you contact Danfoss for service, make sure to mention num-
ber and alarm description.
NB!
Unsuccessful AMA is often caused by incorrectly reg-
istered motor name plate data or a too big difference
Terminal
between the motor power size and the frequency
converter power size.
Step 4. Set speed limit and ramp time
Par. 3-02
Minimum Reference
Par. 3-03
Maximum Reference
Set up the desired limits for speed and ramp time
Motor Speed Low Limit [RPM] or par. 4-12 Motor
Par. 4-11
Speed Low Limit [Hz]
Motor Speed High Limit [RPM] or par. 4-14 Motor
Par. 4-13
Speed High Limit [Hz]
Ramp 1 Ramp up Time
Par. 3-41
Ramp 1 Ramp Down Time
Par. 3-42
•
The brake is released when the motor current exceeds the
preset value in par. 2-20
•
The brake is engaged when the output frequency is less than
the frequency set in par. 2-21
Activate Brake Speed [Hz] , and only if the frequency
par. 2-22
converter carries out a stop command.
If the frequency converter is in alarm mode or in an over-voltage situa-
tion, the mechanical brake immediately cuts in.
®
is a registered Danfoss trademark
structions
Warnings and Alarms chap-
Release Brake Current .
Activate Brake Speed [RPM] or
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