Danfoss VLT AutomationDrive FC 301 Programming Manual page 118

VLT AutomationDrive FC 301/302
Programming Guide
Option Name
[0]* Disabled
[1] Enabled (not at stop)
[2] Enabled
Parameter 2-18 Brake Check Condition
Table 166: 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 167: Parameter 2-19 Over-voltage Gain
2-19 Over-voltage Gain
Default value: 100%
Conversion index: 0
Select overvoltage gain.
5.3.3 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, parameter 5-30
Terminal 27 Digital Output, or parameter 5-31 Terminal 29 Digital Output. When selecting [32] Mechanical brake control, the mechani-
cal braking 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.
Protection mode and trip delay features (parameter 14-25 Trip Delay at Torque Limit and parameter 14-26 Trip Delay at Inverter
Fault) may delay the activation of the mechanical braking in an alarm condition. These features must be disabled in hoisting ap-
plications.
118 | Danfoss A/S © 2022.12
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 coast situations.
Parameter type: Range, 10 - 200%
Data type: Uint16
N O T I C E
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
AU275636650261en-000101 / 130R0334