6.4
S-shaped ramp generator characteristic
For the ramp generator of the main
setpoint
you
tan
select
two
different characteristics
under
Cl 34:
l linear characteristic for all
constant
accelerations
l S-shaped characteristic for all jerk-free accelerations.
Code Name
Parameter
(Factory setting is printed in bold)
Cl34
Ramp-gener.
Q
Ilnear
characteristic
characteristic
-l-
S-shaped charactertstic
(main setpoint)
Acceptance
[SH + PRG]
6.5
Limitation of the frequency setting range
If the drive must rotate in only one direction,
because
a reversal
may darnage material
or
machine
Parts,
you
tan
restritt
the setting
range of the output frequency to one direction of rotation
under
C239.
Especially for configurations with closed-loop
Speed
control the drive
may reverse for a short time.
Code Name Parameter
(Factory setting is printed in
bcld)
C239 Frequency
-O-
Frequency setting
range
-
bipolar
setting range
-l_
Frequency setting range
-
unipolar
Acceptance
[SH + PRG]
6.6 Oscillation damping
Motors
which
are not adapted to the controller output power, may
oscillate in
Speed
with idle running.
If
you increase the value
under
CO79, the oscillatlon is damped. With high chopper frequencies, the
motor noise may increase.
Code
Name
Parameter
(Factory setting is printed in bold)
Acceptance
C079’ Oscillation 2.0
2.0
IO.11
5.0 ON-LINE
damping
* extended
code
set
-
6.7
Load-change damping
If
the load frequently
changes
and if energy is repeatedly absorbed
by the DC bus of the controller (e.g. cyclic lifting and lowering of a
load), the controller is able to damp the increase of the
DC
bus
voltage. The absorbed energy is reduced so that a brake chopper
may not be
necessary.
You
tan
set the damping
under
C234.
Code Name
Parameter
(Factory setting is printed in bold)
Acceptance
C234’
Load-Change 0.25
0.00 (0.01)
5.00 ON-LINE
damping
* extended
code
set
98
To Next Page
Loading...
