MTS Series 793 - Manual (Page 79)

How to Manually Tune the Control Loop
MTS Series 793 Tuning and Calibration Tuning Procedures 79
7. Check system interlocks.
Standalone FlexTest SE Controllers:
If the Hydraulic Interlock or Program Interlock indicator is lit, determine
the cause, correct it, and then click Reset.
If either interlock indicator lights again, you will need to determine the
cause of the interlock and correct it before proceeding.
Automated Controllers:
If the Interlock indicator is lit, click Reset. If the indicator lights again, you
must determine the cause and correct it before proceeding.
8. Open the Tuning submenu or panel.
Standalone FlexTest SE Controllers: Tuning > Manual
Automated Controllers:
A. Click to display the Tuning panel.
B. In the Tuning panel, click the Adjustments tab.
C. Select the Show References check box.
Notice the Reference column on the right side of the window. This
column shows the current set of tuning parameters. Use the buttons to
update reference settings with new values or replace the current values
with the last set that worked properly.
Note The Reference settings are saved with the parameter set.
9. Adjust the P Gain and D Gain tuning controls.
Standalone and Automated Controllers:
A. Start the function generator.
B. On the Scope menu, select Continuous for Sweep Mode.
C. On the Manual Tuning submenu, increase the P Gain adjustment until
you see a little overshoot and a little ringing.
D. Slowly increase the D Gain adjustment to reduce the overshoot and
ringing. Small adjustments of D can have large effects on the system.