Eaton PowerXL DH1 Series - Figure 56. Acceleration;Deceleration (S-Shaped)

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Appendix A—Description of parameters
POWERXL DH1 SERIES ADJUSTABLE FREQUENCY DRIVES MN040041EN—August 2019 www.eaton.com
Code Modbus ID Parameter Application RO/RW
P4.1.9 2423 Run Delay Time 1,2,3 RW
Run Delay time parameter sets the time required for the drive to wait before another run command can be
received. During this time the run signal is given it is ignored until the time has expired upon which it will
then start, in keypad, I/O, or fieldbus Control Modes.
P4.1.10 252 Start Mode 1,2,3 RW
Use this parameter to define the start function.
Ramp
0 = The frequency converter starts from 0 Hz and accelerates to the set reference frequency within
the set acceleration time. (Load inertia or starting friction may cause prolonged acceleration times.)
Flying start
1 = The frequency converter is able to start into a running motor by applying a small voltage to motor
to search for the frequency corresponding to the speed the motor isrunning at. Searching starts from
the maximum frequency toward the actual frequency until the correct value is detected. Thereafter, the
output frequency will beincreased/decreased to the set reference value according to the set acceleration/
deceleration parameters.
Use this mode if the motor is coasting when the start command is given, with the flyingstart.
P4.1.11 253 Stop Mode 1,2,3 RW
Use this parameter to define the stop function.
Coasting
0 = The motor coasts to a halt without any control from the frequency converter, after the Stop command,
output of drive shuts off. The Motor slows based off the inertia loss.
Ramp
1 = After the Stop command, the speed of the motor is decelerated according to the set deceleration
parameters. If the regenerated energy is high and a faster deceleration is required, it may be necessary to
use an external braking resistor for faster deceleration.
Enabled Normal stop: Ramp/ Run
Disable stop: coasting
P4.1.12 247 Ramp 1 Shape 1,2,3 RW
Use this parameter to make the beginning and end of the acceleration and deceleration ramps can be
smoother. Setting a value of 0.0 gives a linear ramp shape that causes acceleration and deceleration to react
immediately to the changes in the reference signal.
Setting a value from 0.1 to 10 seconds for this parameter produces an S-shaped acceleration/deceleration at
the start and stop of the slope.
P4.1.13 248 Ramp 2 Shape 1,2,3 RW
The start and end of the acceleration and deceleration ramps can be smoothed with these parameters.
Setting a value of 0.0 gives a linear ramp shape that causes acceleration and deceleration to react
immediately to the changes in the reference signal.
Setting a value from 0.1 to 10 seconds for this parameter produces an S-shaped acceleration/deceleration at
the start and stop of the slope.
Figure 56. Acceleration/Deceleration (S-shaped)
P7.11 (P7.12)
P7.11 (P7.12)
P1.3, P1.4
(P7.13, P7.14)
t
Hz
P4.1.14 249 Accel Time 2 1,2,3 RW
Use this parameter to set the time required for the output frequency to accelerate from the zero frequency
to the set maximum frequency. These parameters provide the possibility to set two different acceleration/
deceleration time sets for one application. The active set can be selected with the programmable digital
input.