Danfoss VLT AutomationDrive FC 301

Parameter 3-81 Quick Stop Ramp Time
Table 251: Parameter 3-81 Quick Stop Ramp Time
3-81 Quick Stop Ramp Time
Default value: Size related
Parameter type: Range, 0.01 - 3600 s
Setup: 2 setups
Conversion index: -2
Data type: Uint32
Change during operation: True
Enter the quick–stop ramp-down time, that is the deceleration time from the synchronous motor speed to 0 RPM. Ensure that no
resulting overvoltage occurs in the inverter due to regenerative operation of the motor required to achieve the given ramp-down
time. Ensure also that the generated current required to achieve the given ramp-down time does not exceed the current limit (set in
parameter 4-18 Current Limit). Quick stop is activated with a signal on a selected digital input, or via the serial communication port.
e30ba069.10
Time
RPM
P 4-13 RPM
high limit
Reference
P 1-25
Motor speed
low limit
P 4-11 RPM
P 3-81
Qramp
Qstop
Illustration 54: Quick Stop Ramp Time
Parameter 3-82 Quick Stop Ramp Type
Table 252: Parameter 3-82 Quick Stop Ramp Type
3-82 Quick Stop Ramp Type
Default value: [1] Linear
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
Select the ramp type, depending on requirements for acceleration/deceleration. A linear ramp gives constant acceleration during
ramping. An S-ramp gives non-linear acceleration, compensating for jerk in the application.
Option
Name
Description
[0]*
Linear
[1]
S-ramp Const Jerk
[2]
S-ramp Const Time
Parameter 3-83 Quick Stop S-ramp Ratio at Decel. Start
Table 253: Parameter 3-83 Quick Stop S-ramp Ratio at Decel. Start
3-83 Quick Stop S-ramp Ratio at Decel. Start
Default value: 50%
Parameter type: Range, 1 - 99%
Setup: All setups
Conversion index: 0
Data type: Uint8
Change during operation: True
AU275636650261en-000101 / 130R0334 | 151Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide