This instruction allows you to define the present motor position as any absolute position you like. The Seek Home instruction automatically clears the absolute position counter when it's finished, defining the home position as 0. But you may want something else. Perhaps you want to think of the home sensor as being the 8 inch position, or 90 degrees, or whatever. Simply put a Set Position instruction after the Seek Home instruction, or anywhere else in your program where you want to define the absolute position.