Danfoss VLT AutomationDrive FC 301 Programming Manual page 148

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VLT AutomationDrive FC 301/302
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%
Conversion index: 0
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%
Conversion index: 0
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%
Conversion index: 0
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
Conversion index: –
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.
148 | Danfoss A/S © 2022.12
Parameter type: Range, 1 - 99%
Data type: Uint8
Parameter type: Range, 1 - 99%
Data type: Uint8
Parameter type: Range, 1 - 99%
Data type: Uint8
Parameter type: Option
Data type: Uint8
N O T I C E
Parameter Descriptions
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
AU275636650261en-000101 / 130R0334

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