Unitek Classic P3 400/450-15, Manual, Page: 17 / 26

P3 15-40 17
4 Adustment
Adjustments – Current controller
Current controller - PI loop circuit
Adjustments with the DIP switch S2
Optimization of the current controller
- Connect an oscilloscope across the current actual value X3:21
- Current command value step-change 1V X3:16
- Increase the current command value by 1V steps to 10V
- Alter the P-amplification by means of the DIP switches S2:1 and S2:2
- Optimal adjustment see fig. 1
- Not permissible adjustment see fig. 2
- Alter the integral part by means of the DIP switches S2:3 and S2:4
Oscilloscope - Current adjustment
Fig. 1 Fig. 2 Fig. 3
Optimal adjustment Amplification too high P-amplification too low
A
d
ju
st
m
e
n
t
47K
150K
100K
2
1
4
3
0,68µF
0,33µF
0,22µF
RVI
100K
P - component
I - component
S2
I
max