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Menu - Products/Fans - Control

1. Proportional
   • has a direct ratio to rate error. A higher proportional value results in a greater response to rate error.
2. Integral
   • accumulates errors to provide an offset to the rate adjustment. A higher integral increases the offset due to past rate errors.
3. Derivative
   • looks at past errors in the system and calculates the slope of those errors to predict future error values. It has dampening affect on rate control.
4. PWM Maximum
   • the maximum power sent to the valve/motor when rate error is large. When the error gets less than 20% the rate of adjustment is decreased to 75% of normal. When the error gets below 4% no further rate adjustment is made.
5. PWM Minimum
   • the minimum power sent to the valve/motor to begin adjustment
6. PID Scaling
   • Divisor sets the resulting value size
   • P example shows the effect of the scaling
7. Pressing on the button with the arrow and hard drive enters the default values for these settings.
8. Pressing on the graph button shows a tuning graph to help with adjusting the settings.