Additional Connections; Mechanical Brake Control; Mg34Q222 - Vlt ® Is A Registered Danfoss Trademark - Danfoss vlt fc 300 Instruction Manual

®
VLT Automation Drive FC 300 12-Pulse
How to Install
Instruction Manual High Power
4. Choose between complete or reduced AMA. If a
sine-wave filter 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 adjustable frequency
drive enters into alarm mode and the display
shows that the AMA was terminated by the user.
Successful AMA
1. The display shows "Press [OK] to finish AMA".
2. Press the [OK] key to exit the AMA state.
Unsuccessful AMA
1. The adjustable frequency drive enters into alarm
mode. A description of the alarm can be found in
the Warnings and Alarms chapter.
2. "Report Value" in the [Alarm Log] shows the last
measuring sequence carried out by the AMA
before the adjustable frequency drive entered
alarm mode. This number along with the
description of the alarm will assist you in trouble-
shooting. If you contact Danfoss for service, make
sure to mention the number and alarm
description.
NOTE!
Unsuccessful AMA is often caused by incorrectly registered
motor nameplate data or a difference that is too large
between the motor power size and the adjustable
frequency drive power size.
Step 4. Set speed limit and ramp time
3-02 Minimum Reference
3-03 Maximum Reference
Set up the desired limits for speed and ramp time
4-11 Motor Speed Low Limit [RPM] or 4-12 Motor
Speed Low Limit [Hz]
4-13 Motor Speed High Limit [RPM] or 4-14 Motor
Speed High Limit [Hz]
3-41 Ramp 1 Ramp-up Time
3-42 Ramp 1 Ramp-down Time
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3.7 Additional Connections

3.7.1 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 (terminal 27 or 29).
•
Keep the output closed (voltage-free) as long as
the adjustable frequency drive is unable to
'support' the motor, such as when the load is too
heavy, for example.
•
Select Mechanical brake control [32] in parameter
group 5-4* for applications with an electro-
mechanical brake.
•
The brake is released when the motor current
exceeds the preset value in 2-20 Release Brake
Current.
•
The brake is engaged when the output frequency
is less than the frequency set in 2-21 Activate
Brake Speed [RPM]or 2-22 Activate Brake Speed
[Hz], and only if the adjustable frequency drive
carries out a stop command.
If the adjustable frequency drive is in alarm mode or in an
overvoltage situation, the mechanical brake immediately
cuts in.
3-47
3 3