Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 195)

Running a Program
Chapter 7
7-13
Use the Mid-Start Program feature to begin program execution from some
block other than the first block of the program. This feature will scan the
program as it searches and from within the search area:
send to PAL the last programmed modal G--codes from each modal
group.
send to PAL the last programmed modal M--codes from each modal
group and set its associated PAL strobe (non--modal codes including
user--defined M--codes are not sent to PAL).
send to PAL the last programmed T code and set its associated PAL
strobe
send to PAL the last programmed auxiliary function code (B--word) and
set its associated PAL strobe
send to PAL the last programmed spindle commanded speed and set its
associated PAL strobe
resolve paramacro equations and assign paramacro variable values (note
on dual process systems shared paramacro variables can be different
than expected depending on the state of the part program in the other
process, also equations that use PAL paramacro variables may also
evaluate differently since no paramacro interaction with PAL occurs
during a search operation).
establishes any work coordinate system, including all offsets and
rotations to the work coordinate system.
Important: Incremental moves that occur during a program search with
recall operation, are always referenced from the last known absolute
position in the part program. If no absolute position is specified in the
searched part program blocks, the control will use the current axis position
as the start point for incremental moves.
When a search with recall is performed, the control finds a character string
or sequence number in a specific block for execution to begin from. Note
that execution always begins from the beginning of the block, regardless of
the location in the block of the searched string or sequence number. This
searched block must be a block that would normally be executed during the
full programs execution (a block that would be skipped by some means
such as a jump, etc., cannot be searched for).
The program search with recall feature maybe used to search into any
subprograms or paramacros that may be contained in the main program.
This is provided of course, that the searched block is in the path of normal
program execution.
7.6
Search With Recall
{MID ST PRGRAM}