BI-DIRECTIONAL COUNTERS - What is displaying F1 F2 F4?
N notches encoders provide in reality 4 fronts for each notch, whereby it is possible to have a counting resolution up to 4 times the number of notches of the encoder. The function F1 F2 F4 displays the count counting a single impulse to notch, or 2 or 4. In practice with an encoder with 1000 notches per revolution can display 1000 counts or 2000 or 4000.