ABB ACS850 Firmware Manual page 134

134 Parameters
No. Name/Value
23.15 PI adapt max sp
23.17 Pcoef at min sp
23.18 Icoef at min sp
0 ... 30000 rpm
23.16 PI adapt min sp
0 ... 30000 rpm
23.17 Pcoef at min sp
0.000 ... 10.000
23.18 Icoef at min sp
0.000 ... 10.000
23.20 PI tune mode
Done
Smooth
Middle
Description
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 (23.01 Proport
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
min sp, 23.01 Proport gain
multiplied by 23.17 Pcoef at min sp
respectively.
When the actual speed is equal to or exceeds
max sp, no adaptation takes place; in other words,
Proport gain and 23.02 Integration time
Between 23.16 PI adapt min sp
the coefficients are calculated linearly on the basis of the
breakpoints.
Coefficient for K or T
p I
1.000
or
0 23.16 PI adapt
min sp
K = Proportional gain
p
T = Integration time
I
Maximum actual speed for speed controller adaptation.
Minimum actual speed for speed controller adaptation. See
parameter 23.15 PI adapt max
Minimum actual speed for speed controller adaptation.
Proportional gain coefficient at minimum actual speed. See
parameter 23.15 PI adapt max
Proportional gain coefficient at minimum actual speed.
Integration time coefficient at minimum actual speed. See
parameter 23.15 PI adapt max
Integration time coefficient at minimum actual speed.
Activates the speed controller autotune function.
No tuning has been requested (normal operation)
Request speed controller autotune with preset settings for
smooth operation.
Request speed controller autotune with preset settings for
medium-tight operation.
gain) and integration time
and 23.02 Integration time
and 23.18 Icoef at min sp
are used as such.
and 23.15 PI adapt max
23.15 PI adapt
max sp
sp.
sp.
sp.
FbEq
(23.02
23.16 PI adapt
are
23.15 PI adapt
23.01
sp,
Actual speed
(rpm)
1 = 1 rpm
1 = 1 rpm
1000 = 1
1000 = 1
0
1
2