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KFU 2-/4-
141
13.7 Frequency
ramps
The ramps determine how quickly the frequency value is changed if the reference
value changes or after a start, stop or brake command. The maximum admissible
ramp gradient can be selected according to the application and the current con-
sumption of the motor.
If the settings of the frequency ramps are identical for both directions of rotation, the
parameterization via the parameters
Acceleration (clockwise)
420
and
Deceleration
(clockwise)
421
is sufficient. The values of the frequency ramps are taken over for
Acceleration anticlockwise
422
and
Deceleration anticlockwise
423
if these have
been parameterized to the factory setting of -0.01 Hz/s.
The parameter value of 0.00 Hz/s for the acceleration blocks the corresponding di-
rection of rotation.
Parameter
Settings
No. Description
Min.
Max.
Fact.
sett.
420 Acceleration (clockwise)
0.00 Hz/s
9999.99 Hz/s
5.00 Hz/s
421 Deceleration (clockwise)
0.01 Hz/s
9999.99 Hz/s
5.00 Hz/s
422 Acceleration anticlockwise
- 0.01 Hz/s
9999.99 Hz/s
- 0.01 Hz/s
423 Deceleration anticlockwise
- 0.01 Hz/s
9999.99 Hz/s
- 0.01 Hz/s
The ramps for the
Emergency stop clockwise
424
and
Emergency stop anticlockwise
425
of the drive mechanism to be activated via
Operation mode
630
for the stop-
ping behavior must be selected according to the application. The non-linear (S-
shaped) course of the ramps is not active in the case of an emergency stop of the
drive.
Parameter
Settings
No. Description
Min.
Max.
Fact.
sett.
424 Emergency stop clockwise
0.01 Hz/s
9999.99 Hz/s
5.00 Hz/s
425 Emergency stop anti-clockwise
0.01 Hz/s
9999.99 Hz/s
5.00 Hz/s
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