BONFIGLIOLI ACTIVE Cube ACU 201-01 Operating Instructions Manual page 165

Setting the ramp time to 0 ms deactivates the function S curve and enables the use
of the linear ramps. The data set change-over of the parameters within an accelera-
tion phase of the drive mechanism demands the defined take-over of the values. The
controller calculates the values required in order to reach the reference value from
the ratio of the acceleration to the ramp time and uses it until the acceleration phase
is complete. With this method, exceeding the reference values is avoided and a data
set change-over between extremely deviating values becomes possible.
No. Description
430 Ramp rise time clockwise
431 Ramp fall time clockwise
432 Ramp rise time anticlockwise
433 Ramp rise time anticlockwise
+f
m ax
Rotary field
clockwise
Rotary field
anticlockwise
-f
ma x
Example:
Operating Instructions ACU
06/13
Parameter
Ramp Fall Time Clockwise 431
Ramp Rise Time Clockwise 43 0
t
au fr
t
au f
Ramp Rise Time Anticlockwise 432
Calculation of the acceleration time in clockwise rotation at an accel-
eration from 20 Hz to 50 Hz (fmax) and an acceleration ramp of 2 Hz/s
for parameter
Acceleration (clockwise)
430 is set to 100 ms.
clockwise
Δf
=
t
aufr
a
r
−
50 Hz 20 Hz
= =
t
aufr
2 Hz/s
= +
t t t
auf aufr Vr
= + =
t 15 s 100 ms 15,1
auf
Settings
Min. Max.
0 ms 65000 ms
0 ms 65000 ms
0 ms 65000 ms
0 ms 65000 ms
Frequency reference value = 0.00 Hz
Ramp Rise Time Anticlockwise 433
420. The
t = acceleration time
aufr
clockwise rotary field
∆f = change of frequency
acceleration ramp
15 s
a = Acceleration clockwise
r
t = Ramp rise time clockwise
Vr
s
t = acceleration time +
auf
ramp rise time
Fact. sett.
0 ms
0 ms
0 ms
0 ms
t
Ramp rise time
165