SKS Sweden Bonfiglioli Vectron ACTIVE CUBE ACU 201 Series, Operating Instructions Manual

Page: 146 / 260

144 Operating Instructions ACU 09/08
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.
Parameter Settings
No. Description Min. Max. Fact. sett.
430 Ramp rise time clockwise 0 ms 65000 ms 0 ms
431 Ramp fall time clockwise 0 ms 65000 ms 0 ms
432 Ramp rise time anticlockwise 0 ms 65000 ms 0 ms
433 Ramp rise time anticlockwise 0 ms 65000 ms 0 ms
Rotary field
clockwise
Rotary field
anticlockwise
+f
m ax
-f
ma x
Ramp Rise Time Clockwise 430
Ramp Fall Time Clockwise 431
Ramp Rise Time Anticlockwise 432
Ramp Rise Time Anticlockwise 433
t
t
au fr
t
au f
Frequency reference value = 0.00 Hz
Example: 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)
420. The
Ramp rise time
clockwise
430 is set to 100 ms.
r
aufr
a
Δf
t =
s 15
Hz/s 2
Hz 20 Hz 50
t
aufr
=
−
=
s 15,1 ms 100 s 15 t
t t t
auf
Vr aufr auf
= + =
+ =
taufr
∆f
ar
tVr
tauf
=
=
=
=
=
acceleration time
clockwise rotary field
change of frequency
acceleration ramp
Acceleration clockwise
Ramp rise time clockwise
acceleration time +
ramp rise time
Operating Instructions ACU 09/08 144