8 Homing
8-8
NJ/NX-series CPU Unit Motion Control Userās Manual (W507)
Select the direction (positive or negative) in which the axis starts moving when homing is started. If
homing starts while the home proximity signal is ON in a Homing Operation Mode that includes reversal
operation for a proximity reverse turn, the axis starts motion in the direction opposite to the home input
detection direction (regardless of the setting of the homing start direction).
There are four Homing Operation Modes that include reversal operation for a proximity reverse turn.
These are listed below.
⢠0: Proximity reverse turn/home proximity input OFF
⢠1: Proximity reverse turn/home proximity input ON
⢠9: Proximity reverse turn/home input mask distance
⢠12: Proximity reverse turn/holding time
(1) and (3): The home proximity signal is OFF, so the axis starts moving in the homing start direc-
tion.
(2): The home proximity signal is ON, so the axis starts moving in the direction opposite to
the home input detection direction.
(1) and (3): The home proximity signal is OFF, so the axis starts moving in the homing start direc-
tion.
(2): The home proximity signal is ON, so the axis starts moving in the direction opposite to
the home input detection direction.
Select the direction (positive or negative) in which to detect home. Refer to Homing Start Direction on
page 8-8 for the relationship between the home detection method and the initial direction when homing
starts.
⢠Select the operation when the axis reaches a limit input in the operating direction during homing:
reverse the axis and continue with homing, or do not reverse the axis, create an error, and stop the
axis. To reverse the axis, also select the stopping method.
Homing Start Direction
Home Input Detection Direction
Operation Selection at Positive Limit Input and Operation Selection
at Negative Limit Input
ON
OFF
(1) (3)
(2)
Homing start direction: Positive
Home input detection direction: Positive
Home proximity
input signal
Operation command
Positive
direction
Negative
direction
Start Start
Start
ON
OFF
(1) (3)
(2)
Homing start direction: Negative
Home input detection direction: Negative
Home proximity
input signal
Operation command
Positive
direction
Negative
direction
Start
StartStart