Danfoss VLT AutomationDrive EZ FC 321 Programming Manual page 113

VLT® AutomationDrive EZ FC 321
Programming Guide
Parameter 3-42 Ramp 1 Ramp Down Time
Table 185: Parameter 3-42 Ramp 1 Ramp Down Time
3-42 Ramp 1 Ramp Down Time
Default value: Size related
Conversion index: -2
Enter the ramp-down time, that is the deceleration time from the synchronous motor speed n
such that no overvoltage occurs in the inverter due to regenerative operation of the motor, and such that the generated current
does not exceed the current limit set in parameter 4-18 Current Limit. The value 0.00 corresponds to 0.01 s in speed mode. See ramp-
up time in parameter 3-41 Ramp 1 Ramp Up Time.
t s × n
dec s
Par . 3 − 42 =
ref RPM
Parameter 3-45 Ramp 1 S-ramp Ratio at Accel. Start
Table 186: Parameter 3-45 Ramp 1 S-ramp Ratio at Accel. Start
3-45 Ramp 1 S-ramp Ratio at Accel. Start
Default value: 50%
Conversion index: 0
Enter the proportion of the total ramp-up time (parameter 3-41 Ramp 1 Ramp Up Time) in which the acceleration torque increases.
The larger the percentage value, the greater the jerk compensation achieved, and thus the lower the torque jerks occurring in the
application.
Parameter 3-46 Ramp 1 S-ramp Ratio Accel. End
Table 187: Parameter 3-46 Ramp 1 S-ramp Ratio at Accel. End
3-46 Ramp 1 S-ramp Ratio at Accel. End
Default value: 50%
Conversion index: 0
Enter the proportion of the total ramp-up time (parameter 3-41 Ramp 1 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 3-47 Ramp 1 S-ramp Ratio at Decel. Start
Table 188: Parameter 3-47 Ramp 1 S-ramp Ratio at Decel. Start
3-47 Ramp 1 S-ramp Ratio at Decel. Start
Default value: 50%
Conversion index: 0
Enter the proportion of the total ramp-down time (parameter 3-42 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 3-48 Ramp 1 S-ramp Ratio at Decel. End
Table 189: Parameter 3-48 Ramp 1 S-ramp Ratio at Decel. End
3-48 Ramp 1 S-ramp Ratio at Decel. End
Default value: 50%
Conversion index: 0
Danfoss A/S © 2021.08
Parameter type: Range, 0.01 - 3600 s
Data type: Uint32
RPM
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: Range, 1 - 99%
Data type: Uint8
Parameter Descriptions
Setup: All setups
Change during operation: True
to 0 RPM. Select a ramp-down time
s
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
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