Rockwell Automation GMLC Reference Manual - Manual (Page 525)

Publication GMLC-5.2 - November 1999
488 Motion Variables
PCAM Registration Error
PCAM_registration_error is used by the auto-correction feature of
position-lock cams to automatically correct for error between the
measured registration position, and the desired or expected registration
position.
In the Tag Explorer, select both Axis System Variables and the desired
axis, then select PCAM_registration_error in the Tag Window. Although
you must select a slave axis in the Tag Explorer, the
PCAM_registration_error value is returned in position units of the
corresponding:
The PCAM_registration_error value is returned in
position units of the corresponding:
For:
Master axis of the position-lock cam Absolute or relative auto-correction.
Registering axis Absolute ratioed or relative ratioed
auto-correction.