Speed Reference Conditioning - ABB ACS880 Firmware Manual

No. Name/Value
24
24 Speed reference
conditioning
24.01 Used speed
reference
-30000.00 ...
30000.00 rpm
24.02 Used speed
feedback
-30000.00 ...
30000.00 rpm
24.03 Speed error filtered
-30000.0 ...
30000.0 rpm
24.04 Speed error
inverted
-30000.0 ...
30000.0 rpm
24.11 Speed correction
-10000.00 ...
10000.00 rpm
24.12 Speed error filter
time
0...10000 ms
Description
Speed error calculation; speed error window control
configuration; speed error step.
See the control chain diagrams on pages
Displays the ramped and corrected speed reference (before
speed error calculation). See the control chain diagram on
page 394.
This parameter is read-only.
Speed reference used for speed error calculation.
Displays the speed feedback used for speed error calculation.
See the control chain diagram on page 394.
This parameter is read-only.
Speed feedback used for speed error calculation.
Displays the filtered speed error. See the control chain
diagram on page 394.
This parameter is read-only.
Filtered speed error.
Displays the inverted (unfiltered) speed error. See the control
chain diagram on page 394.
This parameter is read-only.
Inverted speed error.
Defines a speed reference correction, ie. a value added to the
existing reference between ramping and limitation. This is
useful to trim the speed if necessary, for example to adjust
draw between sections of a paper machine.
See the control chain diagram on page 394.
Speed reference correction.
Defines the time constant of the speed error low-pass filter.
If the used speed reference changes rapidly, the possible
interferences in the speed measurement can be filtered with
the speed error filter. Reducing the ripple with this filter may
cause speed controller tuning problems. A long filter time
constant and fast acceleration time contradict one another. A
very long filter time results in unstable control.
Speed error filtering time constant. 0 = filtering disabled.
Parameters 169
Def/FbEq16
394 and 395.
-
See par.
46.01
-
See par.
46.01
-
See par.
46.01
-
See par.
46.01
0.00 rpm
See par.
46.01
0 ms
1 = 1 ms