TROUBLESHOOTING
9.6 Gain scheduling theory
Note that a properly calibrated diameter sensor is needed for gain scheduling.
When Gain Scheduling is active, stability and tuning are affected by:
Overall Gain,
Error Limit,
Present Diameter,
Proportional Gain at Core,
Integrator Time at Core,
Derivative Time at Core,
Core Diameter
Proportional Gain at Full Roll,
Integrator Time at Full Roll,
Derivative Time at Full Roll,
Full Roll Diameter.
The current, active dynamic tuning parameters (PID) are interpolated between the core PID values and the full roll
PID values using the present diameter (as read by the diameter sensor). The core and full roll PID values can be
edited directly at
Home>>More..>>Program>>Calibrate>>Dynamic Parameters>>Gain Sched Parameters
Or at
Home>>More..>>Program>>Calibrate>>Calibrate Dynamics>>Gain Scheduling>>Parameters
The PID values at core and at full roll can also be generated using Auto tuning or using Manual Optimization. (See
appropriate section in this manual.) Whatever method is used a valid set of PID parameters must be generated at
core and another valid set of PID parameters must be generated at full roll.
After the valid set of PID parameters is generated it can be automatically stored as Gain Scheduling parameters by
going to:
Home>>More..>>Program>>Calibrate>>Calibrate Dynamics>>Gain Scheduling
and then press “Store Values” for either values tuned at core or for values tuned at full roll.
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