Additional Connections; Mechanical Brake Control - Danfoss VLT Automation Drive FC 300 Instruction Manual

VLT ® Automation Drive FC 300
Instruction Manual High Power
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
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 troubleshooting. 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
Minimum Reference
Maximum Reference
Table 3.13: Set up the desired limits for speed and ramp time.

3.10 Additional Connections

3.10.1 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 adjustable frequency drive is unable to 'support' the motor, such as when the load is too
heavy, for example.
Mechanical brake control
• Select
• The brake is released when the motor current exceeds the preset value found in par. 2-20.
• The brake is engaged when the output frequency is less than the frequency found in par. 2-21 or 2-22, 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.
par. 3-02
par. 3-03
[32] in par. 5-4* for applications with an electro-mechanical brake.
MG.33.U2.22 - VLT ® is a registered Danfoss trademark
Warnings and Alarms
Motor Speed Low Limit par. 4-11 or 4-12
Motor Speed High Limit par. 4-13 or 4-14
Ramp-up Time 1 [s] par. 3-41
Ramp-down Time 1 [s] par. 3-42
3 How to Install
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3
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