Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 279)

Introduction to Programming
Chapter 10
10-11
All program blocks must have an end of block statement as the last
character in the block. This character tells the control how to separate data
into blocks. The control uses the “;” to mark the end of a block.
Important: When performing an EOB search, the search is executed from
the beginning of the part program, NOT from the point of display.
To specify an end of block character “;” at the keyboard use the [EOB] key
on the operator panel. If you are editing part programs off line you cannot
enter the end of block character when blocks are keyed in. See chapter 7.
The control automatically inserts end of block “;” when the program is
downloaded.
When the same series of blocks is repeated more than once it is usually
easier to program them using a subprogram.
The key difference between a subprogram and a G65 paramacro is that a
paramacro always gets a new set of local parameters. A subprogram uses
the same set of local parameters that the main program used. See chapter
28 for details on paramacros and local parameters.
This section explains:
Main and subprograms
Subprogram calls
Important: To make jumps, loops, or calculations within an executing
program or subprogram, use any of the paramacro features described in
chapter 28.
You can call a subprogram in an MDI command; however, a MDI
command cannot contain an M99 code.
CAUTION: Any edits that you make to a subprogram or
paramacro program (as described on page 5-4) that have already
been called for automatic execution are ignored until the calling
program is disabled and reactivated. Subprograms and
paramacros are called for automatic execution the instant that
the calling program is selected as active (as described on page
7-6).
10.2.5
End of Block Statement
10.3
Using Subprograms