ABB ACSM1 - Page 172

Parameters and firmware blocks
172
28.12 PI ADAPT MAX SPD FW block: SPEED CONTROL (see above)
Maximum actual speed for speed controller adaptation.
Speed controller gain and integration time can be adapted according to actual speed. This is done by
multiplying the gain (28.02 PROPORT GAIN) and integration time (28.03 INTEGRATION TIME) by
coefficients at certain speeds. The coefficients are defined individually for both gain and integration
time.
When the actual speed is below or equal to 28.13 PI ADAPT MIN SPD, 28.02 PROPORT GAIN and
28.03 INTEGRATION TIME are multiplied by 28.14 P GAIN ADPT COEF and 28.15 I TIME ADPT
COEF respectively.
When the actual speed is equal to or exceeds 28.12 PI ADAPT MAX SPD, no adaptation takes place;
in other words, 28.02 PROPORT GAIN and 28.03 INTEGRATION TIME are used as such.
Between 28.13 PI ADAPT MIN SPD and 28.12 PI ADAPT MAX SPD, the coefficients are calculated
linearly on the basis of the breakpoints.
0…30000 rpm Maximum actual speed for speed controller adaptation.
28.13 PI ADAPT MIN SPD FW block: SPEED CONTROL (see above)
Minimum actual speed for speed controller adaptation. See parameter 28.12 PI ADAPT MAX SPD.
0…30000 rpm Minimum actual speed for speed controller adaptation.
28.14 P GAIN ADPT COEF FW block: SPEED CONTROL (see above)
Proportional gain coefficient. See parameter 28.12 PI ADAPT MAX SPD.
0.000 … 10.000 Proportional gain coefficient.
28.15 I TIME ADPT COEF FW block: SPEED CONTROL (see above)
Integration time coefficient. See parameter 28.12 PI ADAPT MAX SPD.
0.000 … 10.000 Integration time coefficient.
Coefficient for K
p
or T
I
K
p
= Proportional gain
T
I
= Integration time
Actual speed
(rpm)
28.14 P GAIN ADPT COEF or
28.15 I TIME ADPT COEF
28.13 PI ADAPT
MIN SPD
28.12 PI ADAPT
MAX SPD
1.000
0