ABB ACS880 Firmware Manual page 231

No. Name/Value
25.03 Speed integration
time
%
K × e
p
K × e
p
0.00 ... 1000.00 s
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Description
Defines the integration time of the speed controller. The
integration time defines the rate at which the controller output
changes when the error value is constant and the proportional
gain of the speed controller is 1. The shorter the integration
time, the faster the continuous error value is corrected.
Setting the integration time to zero disables the I-part of the
controller. This is useful to do when tuning the proportional
gain; adjust the proportional gain first, then return the
integration time.
The integrator has anti-windup control for operation at a
torque or current limit.
The figure below shows the speed controller output after an
error step when the error remains constant.
Controller output
T
I
Note: This parameter is automatically set by the speed
controller autotune function. See section
autotune (page 44).
Integration time for speed controller.
Parameters 231
Def/FbEq16
2.50 s;
5.00
(95.21
Gain = K = 1
p
T = Integration time > 0
I
T = Derivation time = 0
D
e = Error value
Time
Speed controller
10 = 1 s
b1/b2)