Yaskawa MP2000 - Manual (Page 62)

TECHNICAL NOTE
(k) NOT
The movement starts at the approach speed, and moves to the stroke limit in a negative direction.
When the NOT signal is detected the movement reverses, at the positioning speed. The final
positioning is performed when NOT signal is cleared in reversing. The machine coordinate
system is established with the position to be the HOME.
The amount of the movement from the change detection point of the NOT signal status is set in
the final travel distance of homing and the positioning speed is set in the rapid feed speed.
When the OT signal is detected while moving at the positioning speed, it becomes OT alarm.
It was changeable in the OT signal status by the software processing. Therefore, (*S) sets (*O) a
high-speed scanning.
Detection of the OT signal status change is done by the software. Therefore, positioning
accuracy can not be guaranteed because of high-speed scan time and positioning speed.
Please do not use this method if repeatability is required for the home position.
Input Name Set content
EXECUTE Execution Block enable
REVERSE Direction
selection
The direction of the homing.
0: Seek in forward
1: Seek in reverse
INPUT INPUT input Not used
AXIS Axis setting Axis number related to the block.
1～16
TYPE Home position
return method 17: “NOT" is selected.
TIME Timer limit
setting Maximum time to complete the Homing, if timeout
then Error
TRAVSPD Speed of rapid
feed
Traverse speed in count/second.
0-Max speed (ML3**12)
Moving direction follow the sign of the OFFSET.
APRSPD Approach
speed Approach speed in count/second.
0-Max speed (ML3**12)
CRPSPD Creep rate Not used
OFFSET Offset value Final moving distance. And the position will be this
value. If the value is positive, the final moving is in
the same direction of homing. If it is negative the
final moving will be in the opposite of homing
File: MP2000_IndividualFunctionDocument_RevC 62/168
Doc Number: eng.MCD.05.101
11/17/2005