Mechanical Brake - Danfoss VLT AutomationDrive EZ FC 321 Programming Manual

VLT® AutomationDrive EZ FC 321
Programming Guide
Parameter 2-17 Over-voltage Control
Table 159: Parameter 2-17 Over-voltage Control
2-17 Over-voltage Control
Default value: [0] Disabled
Conversion index: –
Overvoltage control (OVC) reduces the risk of the drive tripping due to an overvoltage on the DC-link caused by generative power
from the load.
Do not enable OVC in hoisting applications.
Option Name
[0]* Disabled
[1] Enabled (not at stop)
[2] Enabled
Parameter 2-18 Brake Check Condition
Table 160: Parameter 2-18 Brake Check Condition
2-18 Brake Check Condition
Default value: [0] At power up
Conversion index: –
Option Name
[0]* At power up
[1] After coast situations
Parameter 2-19 Over-voltage Gain
Table 161: Parameter 2-19 Over-voltage Gain
2-19 Over-voltage Gain
Default value: 100%
Conversion index: 0
Select overvoltage gain.

4.3.3 2-2* Mechanical Brake

Parameters for controlling operation of an electro-magnetic (mechanical) brake, typically required in hoisting applications.
To control a mechanical braking, a relay output (relay 01 or relay 02) or a programmed digital output (terminal 27 or 29) is required.
Normally, this output must be closed during periods when the drive is unable to hold the motor, for example due to an excessive
load. Select [32] Mechanical Brake Control for applications with an electro-magnetic brake in parameter 5-40 Function Relay, parame-
ter 5-30 Terminal 27 Digital Output, or parameter 5-31 Terminal 29 Digital Output. When selecting [32] Mechanical brake control, the
mechanical brake is closed from start-up until the output current is above the level selected in parameter 2-20 Release Brake Current.
During stop, the mechanical braking activates when the speed drops below the level specified in parameter 2-21 Activate Brake
Speed [RPM]. If the drive enters an alarm condition, an overcurrent, or overvoltage situation, the mechanical braking immediately
cuts in. This is also the case during Safe Torque Off.
102 | Danfoss A/S © 2021.08
Parameter type: Option
Data type: Uint8
N O T I C E
Description
No OVC required.
Activates OVC except when using a stop signal to stop the drive.
Activates OVC.
Parameter type: Option
Data type: Uint8
Description
Brake check at power up.
Brake check is performed after cost situations.
Parameter type: Range, 10 - 200%
Data type: Uint16
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
AU373327181955en-000101 / 130R1208