NORD Drivesystems BU0750 - Manual (Page 90)

NORDAC SK 750E Manual
90 Subject to technical amendments BU 0750 GB-3311
7.5 Speed control
Parameter Setting value / Description / Note
Parameter
set
Available with option
P300 Servo mode P
ENC POS
0...1
[ 0 ] This parameter activates speed control with speed measurement via an incremental encoder. This
results in a very stable speed behaviour untill the motor comes to a standstill.
0 = Off
1 = On
Note: For correct function, an incremental encoder must be connected (see encoder
connections, Section 3.6) and the correct pulse number must be entered in
parameter P301.
P301 Incremental encoder pulse number
ENC POS
0...17
[ 6 ] Input of the pulse-count per rotation of the connected incremental encoder.
If the direction of rotation of the encoder is not the same as the FI, (depending on installation and
wiring), this can be compensated by selecting the corresponding negative pulse numbers 8...16.
0 = 500 pulses
1 = 512 pulses
2 = 1000 pulses
3 = 1024 pulses
4 = 2000 pulses
5 = 2048 pulses
6 = 4096 pulses
7 = 5000 pulses
8 = 500 pulses
9 = 512 pulses
10 = 1000 pulses
11 = 1024 pulses
12 = 2000 pulses
13 = 2048 pulses
14 = 4096 pulses
15 = 5000 pulses
16 = -8192 pulses
17 = + 8192 pulses
P310 Speed controller P P
ENC POS
0...3200 %
[ 100 ] P-component of the 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 which are too high can cause the output speed to oscillate.
P311 Speed controller I P
ENC POS
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 (adjustment time is too long).