User guide

CME 2 User Guide Control Loops
Copley Controls 113
Manually tune the Current Loop
METHOD: Apply square-wave excitation to the current loop and adjust current loop
proportional gain (Cp) and current loop integral gain (Ci) to obtain a desired waveform.
For instance:
NOTES:
1) During tuning, observe any warnings that appear to the left of the trace.
2) Some users prefer the Auto Tune feature. See Current Loop Auto Tune (p. 115).
1
Click the Scope Tool.
2
Choose Current from the Function Generator Apply To:
list.
3
On the Settings tab, make sure Auto Setup is selected.
Auto Setup automatically sets the following parameters:
Function Generator Tab
Parameter
Description
Function
Square Wave.
Amplitude
10% of continuous current value.
Frequency
100 Hz.
Settings Tab
Channel 1
Commanded current (green).
Channel 2
Actual current (white).
4
Verify that the Amplitude value is not excessive for the motor.
Continued…