ABB ACS880-01 Series, Firmware Instructions

Page: 269 / 664

Parameters 269
25.02 Speed proportional
gain Defines the proportional gain (K
p
) of the speed controller. Too
high a gain may cause speed oscillation. The figure below
shows the speed controller output after an error step when
the error remains constant.
10.00;
5.00
(
95.21 b1/b2)
If gain is set to 1.00, a 10% error (reference - actual value) in
the motor synchronous speed produces a proportional term of
10%.
Note: This parameter is automatically set by the speed
controller autotune function. See section Speed controller
autotune (page 81 ).
0.00 …250.00 Proportional gain for speed controller. 100 = 1
No. Name/Value Description Def / FbEq16
Gain = K
p
= 1
T
I
= Integration time = 0
T
D
= Derivation time = 0
%
Controller
output = K
p
× e
Time
e = Error value
Controller output
E