IAI America SCON-C - Manual (Page 126)

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3.2.2 Method Used When No HOME Input Signal Is Available (PIO Pattern = 5)
Since no home return signal (HOME) is available in PIO pattern 5, input the rear end move command (ST0) first
to perform home return.
 When the rear end movement command (ST0) turns ON, the actuator starts moving toward the mechanical
end on the home side.
Once the mechanical end is contacted, the actuator reverses its direction and moves to the home position,
stops temporarily at the home position, and then moves to the rear end.
 Once the home position is reached, the home return complete output (HEND) turns ON.
With an absolute type controller, home return operation is not a requirement because the home return
completion output (HEND) will turn ON after the power is input to the controller.
Caution: When performing home return, pay attention to the following:
[1] Confirm that no obstacle is present in the rear end direction.
[2] If any obstacle is present in the rear end direction, move the actuator toward the front end and
remove the obstacle. Issuance of the front end move command is permitted for this reason. In
this case, the actuator moves forward at the home return speed and when the actuator
reaches the mechanical end, the front end position complete output (LS1) turns ON.
[3] Do not input the intermediate point move command (even if the command is input, it will be
ignored).
Rear end move command input
(ST0)
Home return complete output
(HEND)
Rear end detected output
(LS0)
Mechanical
end
Home position
Target position