ABB ACS355 User Manual page 228

228 Actual signals and parameters
All parameters
No. Name/Value
2302 INTEGRATION
TIME
0.00...600.00 s Time
Description
Defines an integration time for the speed controller. The
integration time defines the rate at which the controller
output changes when the error value is constant. The
shorter the integration time, the faster the continuous error
value is corrected. Too short an integration time makes the
control unstable.
The figure below shows the speed controller output after an
error step when the error remains constant.
%
Controller output
K · e
p
K · e
p
Note: For automatic setting of the integration time, use
autotune run (parameter
Gain = K = 1
p
T = Integration time > 0
I
T = Derivation time = 0
D
e = Error value
t
T
I
2305 AUTOTUNE RUN).
Def/FbEq
0.50 s
1 = 0.01 s