Homing during travel from the cam

By means of a simple measure, namely by inverting the travel direction during referencing (ref_richt) and the cam switch signal level (cam_level), referencing takes place with the falling edge. Presuming the cam switch is actuated at the start of homing, this is a three-phase homing. This method is advantageous whenever, in the case of the method presented above, the reference position lies outside of the corresponding software limit switch. The following changes apply to the example mentioned before: