Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set User Manual
Page 99
Axis Parameters
Chapter 4
4-15
Paramacro parameter numbers are assigned to an axis based on the order in
which it is AMPed. Lets use paramacro parameter #5021 to #5029
(Coordinates of Commanded Position) as examples. Assume the
following:
This Axis
AMPed Here
Coordinate of commanded
position is shown in this
paramacro parameter:
This Axis
AMPed Here
Coordinate of commanded
position is shown in this
paramacro parameter:
X
Axis 1 (process 1)
#5021
X
Axis 4
(process 2)
#5021
Y
Axis 2
(process1)
#5022
Y
Axis 5
(process 2)
#5022
Z
Axis 3
(process1)
#5023
Now assume the same configuration as above however this time the Z axis
is a shared axis. Paramacro variables would be assigned as follows:
This Axis
AMPed Here
Coordinate of commanded
position is shown in this
paramacro parameter:
This Axis
AMPed Here
Coordinate of commanded
position is shown in this
paramacro parameter:
X
Axis 1 (process 1)
#5021
Z
Axis 3
(shared but default
is process 1)
#5021
Y
Axis 2
(process1)
#5022
X
Axis 4
(process 2)
#5022
Z
(shared but default
is process 1)
Axis 3
(process1)
#5023 (in process 1)
Y
Axis 5
(process 2)
#5023
With the above configuration a programer could be easily confused. When
the Z axis is in process one, the programmer may wrongly assume that X is
the first axis in process 2 and assume macro variable #5021 for X. This
would be incorrect. Since the Z axis is shared it is assigned paramacro
variables for both process in the order that it was AMPed. Also a
programer could assume that since Z values are attained thru #5023 in
process one, the same value #5023 would be used in process two. This
would also be incorrect. To alleviate this problem you must change the
order in which you AMP axes as follows:
This Axis
AMPed Here
Coordinate of commanded
position is shown in this
paramacro parameter:
This Axis
AMPed Here
Coordinate of commanded
position is shown in this
paramacro parameter:
X
Axis 1 (process 1)
#5021
X
Axis 3
(process 2)
#5021
Y
Axis 2
(process1)
#5022
Y
Axis 4
(process 1)
#5022
Z
Axis 5
(shared but default
is process 1)
#5023
Z
Axis 5
(shared but default
is process 1)
#5023