68 ACS 300 User’s Manual
Chapter 7 - Drive Parameters
PI-GAIN
This parameter defines the gain of PI Controller. The setting
range is 0 to 800 %. If the value is 0 %, the PI Controller is
inactive. Changing of PI-GAIN from 0 is possible only when
start is inactive. The following table shows how the output
frequency changes to a 10 % change in error and a 50 %
change in error with different gain selections.
Some points of view must be taken in consideration when
this parameter is active:
• The Local Ref parameter is not displayed.
• The analog input, AI is used only as the actual value (pro-
cess feedback) input. PI-REF is changed through the con-
trol panel when the drive is in the local mode and as
described below when the drive is in the remote mode.
• The texts on the control panel display for constant fre-
quencies will be CR1, CR2 and CR3. CR = Constant Ref-
erence. The unit is %. With these parameters you can
give constant reference values in the remote mode.
• Joystick control does not operate. On the other hand PI
Control cannot be selected while Joystick control is active.
• Custom settings have no effect.
• The rotation direction cannot be changed.
• Critical frequency ranges are ignored.
PI-ITIME
Defines the integral time of PI Controller. The setting range
is 0.0 to 320.0 s. PI Controller operates as a P Controller
when the parameter value is 320.0 s.
PI-GAIN
Output frequency change
for a 10 % change in error
Output frequency change for a
50 % change in error
50 % 0.75 Hz 3.75 Hz
100 % 1.5 Hz 7.5 Hz
300 % 4.5 Hz 22.5 Hz
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