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three position output

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biobio

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I need a algorithm for a three position output with simulated feedback. (controlling a tube/valve with two digital outputs and now position feedback signal)
 
Explain please.

<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
 
I think that biobio asks for an algorithm that takes a setpoint and an actual position value ("now position") and has two outputs, one to move forwards and one to move backwards. The "three position output" probably means that there are three states: DO1 high or DO2 high or both low.

Is that what you intended biobio?
 
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