Yaskawa MP940 Reference Manual - Manual (Page 226)

Parameter Details MotionSuite™ MP940 Machine Controller Reference Manual
6-26
Supplemental Explanation
The usage method for zero-point offset is shown below.
• When used in applications where the absolute encoder moves in only one
direction:
Using the motion parameter zero-point posiiton offset setting
(OLC006), an absolute encoder may be used in single direction
applications by creating a user program which manages the absolute
position.
• When initializing an absolute encoder:
Pulse reset in less than 1 rotation is not possible when an absolute
encoder is initialized. For example, when stopping at 95.5 rotations,
an incremental pulse is sent corresponding to the 0.5 rotation even
though an absolute encoder was initialized. Position data
corresponding to the 0.5 rotations, rather than 0, is thereby
messaged to the position monitor (ILC008).
Set the following to set the position monitor to 0.
(Assumed Conditions)
The 120 pulse initial incremental pulse is assumed to be sent after the
absolute encoder has been initialized and the MP940 turned ON. The number
displayed on the position monitor is 120.
(Countermeasures)
Countermeasures can be adjusted with the zero-point position offset. The
position monitor shows 0 if -120 is set into the zero-point position offset.
This setting is recommended for drawing A (start processing drawing) as the
value set in the zero-point position offset is reset to 0 upon turning the power
OFF.
(Exp. 1) DWG.A
OLC006 - | 0000000120 > OLC006