ABB ACS880-104

Parameters 275
25.18 Speed adapt min
limit
Minimum actual speed for speed controller adaptation.
Speed controller gain and integration time can be adapted
according to actual speed (90.01 Motor speed for control).
This is done by multiplying the gain (25.02 Speed
proportional gain) and integration time (25.03 Speed
integration time) by coefficients at certain speeds. The
coefficients are defined individually for both gain and
integration time.
When actual speed is below or equal to 25.18 Speed adapt
min limit, the gain and integration time are multiplied by 25.21
Kp adapt coef at min speed and 25.22 Ti adapt coef at min
speed respectively.
When actual speed is equal to or above 25.19 Speed adapt
max limit, no adaptation takes place (the coefficient is 1).
When actual speed is between 25.18 Speed adapt min limit
and 25.19 Speed adapt max limit, the coefficients for the gain
and integration time are calculated linearly on the basis of the
breakpoints.
See also the block diagram on page 650.
0 rpm
0…30000 rpm Minimum actual speed for speed controller adaptation. 1 = 1 rpm
25.19 Speed adapt max
limit
Maximum actual speed for speed controller adaptation.
See parameter 25.18 Speed adapt min limit.
0 rpm
0…30000 rpm Maximum actual speed for speed controller adaptation. 1 = 1 rpm
25.21 Kp adapt coef at
min speed
Proportional gain coefficient at minimum actual speed.
See parameter 25.18 Speed adapt min limit.
1.000
0.000 … 10.000 Proportional gain coefficient at minimum actual speed. 1000 = 1
25.22 Ti adapt coef at min
speed
Integration time coefficient at minimum actual speed.
See parameter 25.18 Speed adapt min limit.
1.000
0.000 … 10.000 Integration time coefficient at minimum actual speed. 1000 = 1
No. Name/Value Description Def/FbEq16
Coefficient for K
p
or T
I
K
p
= Proportional gain
T
I
= Integration time
Actual speed
(90.01) (rpm)
25.18 Speed
adapt min limit
25.19 Speed
adapt max limit
1.000
0
25.21 Kp adapt coef at min speed or
25.22 Ti adapt coef at min speed