Rockwell Automation GMLC Reference Manual - Manual (Page 223)

Publication GMLC-5.2 - November 1999
186 Control Setting Blocks
See the Fault Variable chapter in this manual for more information on the
specific faults.
Redefine Position
The Redefine Position block sets the actual or command position of the
selected axis to the commanded absolute or relative position. This block
causes no motion—it merely redefines the current axis position.
The Redefine Position block resides on the Main Palette.
You can use the Redefine Position block when the axis is moving, and
when the axis is at rest. You use the Redefine Position block to redefine
position on the fly, and for certain registration, slip compensation, and re-
calibration applications.
Absolute Mode
When you select Absolute from the Mode menu, the new position value
specifies the new absolute position of the axis. No motion occurs—the
current axis position (actual or command) is merely redefined, and
becomes the commanded new position.
If your motion controller uses software overtravel limits, the new position
must be a value between the maximum positive and maximum negative
travel parameter values. Otherwise, executing this block generates a
software overtravel fault.
!
ATTENTION: When you redefine an absolute position
while the axis is moving, you can get unexpected results for
certain types of moves.