By default,the controller only needs a reversing switch to change the motor direction.
FWD switch is not necessary for customers to change the direction.
If you want to use F-N-R control,you may use pin12(FWD) and pin14（REV）for this function.
Moreover you may enable three gears switch in the user program.
The pin12 and pin14 are activated by pin11 12V,not ground signal.
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