Additional Connections; Mechanical Brake Control - Danfoss VLT AutomationDrive FC 300 Operating Instructions Manual

How to Install
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 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 frequency converter 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 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
number and alarm description.
NOTE
Unsuccessful AMA is often caused by incorrectly registered
motor name plate data or a too big difference between
the motor power size and the frequency converter 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

4.10 Additional Connections

4.10.1 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 frequency converter is unable to 'support' the
VLT Automation Low Harmonic Drive Operating Instructions
If the frequency converter is in alarm mode or in an over-
voltage situation, the mechanical brake immediately cuts
in.
4.10.2 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
the frequency converter.
®
MG34O202 - VLT is a registered Danfoss trademark
motor, for example due to the load being too
heavy.
•
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 frequency converter carries
out a stop command.
4 4
for
M,N
57