Danfoss VLT AutomationDrive FC 302 Programming Guide

Parameter 3-66 Ramp 3 S-ramp Ratio at Accel. End
Table 240: Parameter 3-66 Ramp 3 S-ramp Ratio at Accel. End
3-66 Ramp 3 S-ramp Ratio at Accel. End
Default value: 50%
Parameter type: Range, 1 - 99%
Setup: All setups
Conversion index: 0
Data type: Uint8
Change during operation: True
Enter the proportion of the total ramp-up time (parameter 3-61 Ramp 3 Ramp Up Time) in which the acceleration torque decreases.
The larger the percentage value, the greater the jerk compensation achieved, and thus the lower the torque jerks in the application.
Parameter 3-67 Ramp 3 S-ramp Ratio at Decel. Start
Table 241: Parameter 3-67 Ramp 3 S-ramp Ratio at Decel. Start
3-67 Ramp 3 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
Enter the proportion of the total ramp-down time (parameter 3-52 Ramp 1 Ramp Down Time) where the deceleration torque increa-
ses. The larger the percentage value, the greater the jerk compensation achieved, and thus the lower the torque jerks in the applica-
tion.
Parameter 3-68 Ramp 3 S-ramp Ratio at Decel. End
Table 242: Parameter 3-68 Ramp 3 S-ramp Ratio at Decel. End
3-68 Ramp 3 S-ramp Ratio at Decel. End
Default value: 50%
Parameter type: Range, 1 - 99%
Setup: All setups
Conversion index: 0
Data type: Uint8
Change during operation: True
Enter the proportion of the total ramp-down time (parameter 3-62 Ramp 3 Ramp Down Time) where the deceleration torque decrea-
ses. The larger the percentage value, the greater the jerk compensation achieved, and thus the lower the torque jerks in the applica-
tion.
5.4.8 3-7* Ramp 4
Parameter 3-70 Ramp 4 Type
Table 243: Parameter 3-70 Ramp 4 Type
3-70 Ramp 4 Type
Default value: [1] Linear
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
N O T I C E
If [1] S-ramp Const Jerk is selected and the reference during ramping is changed, the ramp time may be prolonged to realize a
jerk-free movement, which may result in a longer start or stop time. Additional adjustment of the S-ramp ratios or switching ini-
tiators may be necessary.
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.
AU275636650261en-000101 / 130R0334148 | Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide

Danfoss VLT AutomationDrive FC 302 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 302
Category	DC Drives
Language	English