ABB ACS880-01-430A-3+N5350 - Page 145

12-66 Startup Assistant & Parameters 3AXD50000011888
Table 12-4 Level 1 Parameter Block Definitions
Block Title
Parameter (Number)
Selection (Value)
Descriptions
SPEED CONTROL
(Continued)
SPEED ADAPT MIN LIMIT
(25.18)
Default: 0 RPM
Range: 0 - 30000 RPM
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 coefcients at
certain speeds. The coefcients are dened 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 coefcient is 1).
When actual speed is between 25.18 Speed adapt min limit and 25.19
Speed adapt max limit, the coefcients for the gain and integration time
are calculated linearly on the basis of the breakpoints.
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
SPEED ADAPT MAX LIMIT
(25.19)
Default: 0 RPM
Range: 0 - 30000 RPM
Maximum actual speed for speed controller adaptation.
See parameter 25.18 Speed adapt min limit.
KP ADAPT COEF AT MIN
SPEED (25.21)
Default: 1.000
Range: 0.000 to 10.000
Proportional gain coefcient at minimum actual speed.
See parameter 25.18 Speed adapt min limit.
TI ADAPT COEF AT MIN
SPEED (25.22)
Default: 1.000
Range: 0.000 to 10.000
Integration time coefcient at minimum actual speed.
See parameter 25.18 Speed adapt min limit.