Speed Control - ABB ACS880 Firmware Manual

No. Name/Value
24.44 Speed error window
low
0.00 ... 3000.00
rpm
24.46 Speed error step
-3000.00 ...
3000.00 rpm
25

25 Speed control

25.01 Torque reference
speed control
-1600.0 ... 1600.0% Limited speed controller output torque.
25.02 Speed proportional
gain
Controller
output = K
p
0.00 ...250.00
Description
Defines the lower boundary of the speed error window. See
parameter 24.41 Speed error window control
Lower boundary of speed error window.
Defines an additional speed error step given to the input of
the speed controller (and added to the speed error value).
This can be used in large drive systems for dynamic speed
normalizing.
Speed error step.
Speed controller settings.
See the control chain diagrams on pages
Displays the speed controller output that is transferred to the
torque controller. See the control chain diagram on page 395.
This parameter is read-only.
Defines the proportional gain (K
high a gain may cause speed oscillation. The figure below
shows the speed controller output after an error step when
the error remains constant.
%
Error value
Controller output
× e
If gain is set to 1, a 10% change in error value (reference -
actual value) causes the speed controller output to change by
10%, ie. the output value is input × gain.
Proportional gain for speed controller.
enable.
394 and 395.
) of the speed controller. Too
p
Gain = K = 1
p
T = Integration time = 0
I
T = Derivation time = 0
D
Parameters 171
Def/FbEq16
0.00 rpm
See par.
46.01
0.00 rpm
See par.
46.01
-
See par.
46.03
10.00
e = Error value
Time
100 = 1