Mitsubishi Electric MELSERVO-J4 Instruction Manual page 134

4. HOW TO USE THE POINT TABLE
(2) Parameters for home position return
To perform the home position return, set each parameter as follows.
(a) Select the home position return type with [Pr. PT04 Home position return type].
(b) Select the starting direction for the home position return with [Pr. PT04 Home position return type].
Setting "0" starts the home position return in the address increase direction from the current position.
Setting "1" starts the home position return in the address decrease direction from the current
position.
(c) Select the polarity where the proximity dog is detected with the DOG (Proximity dog) polarity
selection of [Pr. PT29 Function selection T-3]. Setting "0" detects the dog when DOG (Proximity dog)
is off. Setting "1" detects the dog when DOG (Proximity dog) is on.
[Pr. PT04]
0 0 0
Home position return method
0: Dog type
1: Count type
2: Data set type
3: Stopper type
4: Home position ignorance (servo-on position as home position)
5: Dog type rear end reference
6: Count type front end reference
7: Dog cradle type
8: Dog type last Z-phase reference
9: Dog type front end reference
A: Dogless Z-phase reference
[Pr. PT04]
0 0 0
Home position return direction
0: Address increasing direction
1: Address decreasing direction
[Pr. PT29]
0 0 0
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Proximity dog input polarity
0: Detection with off
1: Detection with on