6-18
Programming Your Application
650S AC Drive
MMI Parameters Table
Display
Parameter
Description
Range
Default
SPD START GRAD
MOTOR1
The gain of the PI corrector varies as 1 over speed. To maintain the PI
gain at a constant value over the whole range of the speed, the gain is
internally varied as a function of the speed. This parameter is used to
determine where the 1/X variation is starting to work (because of zero
and low speed behaviour of the estimation). The default value is 5, and
is considered appropriate for most applications.
The total gain applied is:PI GAIN * ADAPTATION GAIN
With:
ADAPTATION GAIN = SPD START GRD from 0 to SPD GRD/SPD START GRD
ADAPTATION GAIN = SPD GRD/real_speed (RPM) from SPD GRD/SPD START GRD
to SPD GRD
ADAPTATION GAIN = 1 above SPD GRD
0.1 to 100
5
SPD GRD
MOTOR1
The gain of the PI corrector varies as 1 over speed. To maintain the PI
gain at a constant value over the whole range of the speed, the gain is
internally varied as a function of the speed.
This parameter is used to select the speed where the
GAIN_ADAPTATION is kept constant and equal to 1 (see graph below).
This value must be set to the nominal motor or application speed.
-32000 to 32000
RPM
4000RPM
SPD
SPD GRD / SPD START GRD
SPD START GRD
Speed (RPM)
ADAPTATION GAIN
