Parker Hannifin S.p.A S.B.C. Division SLVDN User’s ManualPage 154 of 181(1)Homing on the negative limit switch and index pulse13.1.8.1.2. Method 2: Homing on the positive limit switch and index pulseUsing this method the initial direction of movement is rightward if the positive limit switch isinactive (here shown as low). The position of home is at the first index pulse to the left of theposition where the positive limit switch becomes inactive.(2)Index pulseFigure 23: Homing on the positive limit switch and index pulse13.1.8.1.3. Methods 3 and 4: Homing on the positive home switch andindex pul.Using methods 3 or 4 the initial direction of movement is dependent on the state of the homeswitch. The home position is at the index pulse to either to the left or the right of the pointwhere the home switch changes state. If the initial position is sited so that the direction ofmovement must reverse during homing, the point at which the reversal takes place isanywhere after a change of state of the home switch.(3)Index pulse(4)(4)(3)Home switchFigure 24: Homing on the positive home switch and index pulse
