Panasonic FP2-PP2T Technical Manual page 147

DOG method 3 (Edge detection of near home switch + Home switch based on back-end)
Detects the trailing edge of the near home switch, and the first rising edge f the home switch in the home
return direction becomes the starting point.
Limit method 1 (Edge detection of limit switch + Home switch based on front-end)
Reverses after detecting the rising edge of the limit switch in the opposite direction of the home return.
After that, stops at the rising edge of the first home switch and that point becomes the straight point.
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