Control Valve Calibration Number Tuning

PC14715-UN-10FEB12

A - XX: Valve Speed

B - Y: Overshoot Reduction

C - Z: % Error Allowed

The control valve calibration number is set up in the following format XXYZ.

The numbers work similar for all control valve types in spinner and conveyor configurations.

XX adjusts how fast the valve reacts to error between target and actual speeds. If the control is too slow, increase this value. If the control is too fast or fluctuates constantly, reduce this value. Input range is 1-99. Typical values are between 25-75.

Y adjusts overshoot when controlling to a speed change. If the system overshoots the target, increase this number. If control is slow reacting to a speed change, reduce this number. Input range is 0-9. Typical values are between 2-4.

XX and Y can affect each other when changed. Adjusting one value may require a change to the other. It is best to adjust the XX value first to ensure that the system is quick to react. Then change Y value as needed.

Z adjusts control deadband. It represents the error (% of target conveyor/spinner speed) allowed when reaching a target speed. To make the controller more responsive to errors, lower the value. To make the controller more accepting of errors, increase the value. If oscillation or chasing of the target speed occurs, increase this number. The input range is between 0-9. Typical starting value is 3.