Panasonic FP0H User Manual page 63

 DOG method 2 (Edge detection of near home switch)
The leading edge of the near home switch is detected and it is set as a home position.
 DOG method 3 (Edge detection of near home switch + Home switch, based on back
end)
The leading edge of the first home switch in the home return direction is set as a home
position after the detection of the trailing edge (back end) of the near home switch.
5.3 Home Return
5-11