Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 797)

Chapter 30
Using a 9/Series Dual--processing System
30-29
Your system installer performs the majority of set up operations in PAL
and AMP to define a shared axis configuration. This section covers
operations you should perform on the control to properly operate the
shared axis.
Setup Tables
When assigning table values (such as the tool offset tables, coordinate
offset tables, and on-line AMP tables) shared axis data only appears on the
table when the current process has control of the shared axis. For example,
if you need to enter tool length offset data for a shared X axis, you can
enter this offset data from any process as long as the X axis is currently
controlled by that process.
Important: G10 part program blocks can only change shared axis offset
table values if the shared axis is currently assigned to the process running
the G10.
Axis data is displayed only for axes currently assigned to the selected
process. When control of a shared axis is changed the table display of the
shared axis changes also. For example if process one has control of an X
shared axis and you are viewing the X axis on a tool offset table, when
control of the X axis is changed to process two, the X axis display
disappears on the process one tables and appears on the process two tables.
No change to the actual physical data occurs. All table data for a shared
axis stays the same between processes (entering a three inch tool length
offset for a shared axis in one process stays a three inch tool length offset
for all processes unless changed).
Changes made to tables that require an update and exit operation to be
saved (such as On-line AMP screens) must be saved before the shared axis
changes processes. If for example, you change zone information for a
shared axis in process one and change control of that axis to process two
before pressing the {UPDATE & EXIT} softkey, changes to the shared
axis are discarded and the last value saved for that axis is used.
Shared Axis Coordinate Offsets
Each process maintains separate and independent shared axis:
work coordinate system G54-G59.3 offsets
G52 offsets
external offsets
If any G92 offset is active on a shared axis it must be canceled (or made
zero) before the shared axis can change processes.
These offsets are applied to the shared axis when it is switched into the
process. All part program blocks already read into the setup buffers are
re-setup in all processes when a shared axis changes processes.
30.6.3
Setting up a Shared Axis