Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 188)

Running a Program
Chapter 7
7-12
When you press the
{NEXT PRGRAM}
softkey, the control first
searches for a valid program end code. See setting communications,
chapter 9. After it finds the program end code, it advances to the
program start code of the next program. If the current program is the
last program on the tape, the message “SERIAL
COMMUNICATION ERROR #5” appears on the screen indicating a
time-out error.
Important: If performing a STRING search, program execution begins at
the beginning of the block that contains the desired character string. This
is not necessarily the location of the string in the program block.
CAUTION: It may be necessary to position the cutting tool at a
location that allows this block to execute without damaging the
workpiece or cutting tool. This can be done through a manual
operation or through MDI.
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 (nonmodal 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.
7.6
Search With Recall
{MID ST PRGRAM}