Rockwell Automation GMLC Reference Manual - Manual (Page 512)

Publication GMLC-5.2 - November 1999
Chapter
26
Motion Variables
Motion variables let you use values, such as axis position and velocity as
elements in an expression. All motion variables—except the following—
are read-only. They can be used within an expression, but they cannot be
assigned a value:
PCAM_good_registration_count
PCAM_bad_registration_count
PCAM_missing_registration_count
PCAM_auto_correction_to_go
The available motion variables are shown in the following table:
Variable Units
Ser
vo
M
a
ster O
n
ly
V
irtu
a
l
Imag
in
ar
y
Actual_Position Axis Position Units ✔ ✔ ✔
Command_Position Axis Position Units ✔ ✔
Strobed_Position Axis Position Units ✔ ✔ ✔ ✔
Registration_Position Axis Position Units ✔ ✔ ✔
Soft_Reg_Pos_Axis Axis Position Units ✔ ✔ ✔
Marker_Distance Axis Position Units ✔ ✔ ✔
Distance_To_Go Axis Position Units ✔ ✔
Decel_Distance Axis Position Units ✔ ✔
Encoder_Filter_Lag Axis Position Units ✔ ✔
Watch_Position Axis Position Units ✔ ✔ ✔ ✔ ✔
Position_Error Axis Position Units ✔
Average_Velocity Axis Pos. Units/Sec. ✔ ✔ ✔