Nord Drivesystems SK 180E Series, User Manual

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5 Parameter
BU 0180 en-4118 109
5.2.4 Speed control
An incremental rotary encoder does not need to be connected. For this reason, the parameters that
are exclusively used to configure a rotary encoder (P301, P312 – P328, P334) are not described in
this manual. The parameters concerned are present in the software of the device in spite of this. It
must be ensured that these parameters are always left at the factory settings. Otherwise it
cannot be ensured that the frequency inverter will operate correctly.
However, parameter group P3xx is typically concealed in the as-delivered condition of the device, but
is visible to NORD CON.
Parameter
{factory setting}
Setting value / Description / Note Device Supervisor
Parameter
set
P300
Servo Mode
(Servo Mode)
P
0 ... 1
{ 0 } The control method for the motor is defined with this parameter.
0 = Off (VFC open -loop) 1) Speed control without encoder feedback
1 = On (CFC closed-loop) 2)
Speed control with encoder feedback
NOTE:
Commissioning information (

Abschnitt 4.2.1 "Explanation of the operating modes (P300)").
1) Corresponds to the previous setting "OFF"
2)
Corresponds to the previous setting "ON"
Information
Setting 1 = On (CFC closed loop)
An incremental encoder can be evaluated. For this reason, setting 1 = On (CFC closed loop)
has no effect.
P310
Speed controller P
(Speed controller P)
P
0 ... 3200 %
{ 100 } P-component of the speed encoder (proportional amplification).
Amplification factor, by which the speed difference between the setpoint and actual frequency is
multiplied. A value of 100% means that a speed difference of 10% produces a setpoint of 10%.
Values that are too high can cause the output speed to oscillate.
P311
Speed controller I
(Speed controller I)
P
0 ... 800 % / ms
{ 20 } I-component of the encoder (Integration component).
The integration component of the controller enables the complete elimination of any control
deviation. The value indicates how large the setpoint change is per ms. Values that are too small
cause the controller to slow down (reset time is too long).