Reference Manual

PMAC 2 Software Reference
338 PMAC Program Command Specification
PLC programs are specified by number, and may be specified in a command singularly,
in a list (separated by commas), or in a range of consecutively numbered programs.
If no buffer is open when this command is sent to PMAC, it will be executed
immediately as an on-line command.
Example
PAUSE PLC 1
PAUSE PLC 4,5
PAUSE PLC 7..20
PAU PLC 3,8,11
PAU PLC 0..31
See Also
I-variable I5
On-line commands ENABLE PLC, DISABLE PLC, <CONTROL-D>, PAUSE PLC,
RESUME PLC, LIST PLC
Program command ENABLE PLC, DISABLE PLC, RESUME PLC
PRELUDE
Function
Specify automatic subroutine call function
Type
Motion program
Syntax
PRELUDE1{command}
PRELUDE0
where:
• {command} is a subprogram call from the set CALL{constant},
G{constant}, M{constant}, T{constant}, D{constant}.
Remarks
The PRELUDE1 command permits automatic insertion of a subprogram call before each
subsequent motion command (e.g., X10Y10) or other letter-number command (e.g.,
L10) other than a line label in the motion program. The action taken is equivalent to
inserting the call into the program text before each subsequent motion command or letter-
number command.
The subprogram call to be performed can be specified in the PRELUDE1 command either
as a CALL command, or as a G, M, T, or D code. The value following the CALL or code
letter must be a constant. It cannot be a variable or expression. It does not have to be an
integer. If the routine called in the subprogram starts with a READ statement, the motion
or letter-number command itself can become arguments for the subprogram call. Any
motion command within a PRELUDE1 subroutine or subprogram call is executed directly
as a motion command, without an automatic subroutine call in front of it.
PMAC will only execute the PRELUDE1 function if the motion or letter-number
command is found at the beginning of a program line or immediately after the line label.
If another type of command occurs earlier on the program line, no PRELUDE1 function
will be executed before the motion or letter-number command. If the command is on a
line that is already in a subroutine or subprogram reached by a CALL or GOSUB
command, no PRELUDE1 function will be executed.
Each PRELUDE1 command supersedes the previous PRELUDE1 command. It is not
possible to nest automatic PRELUDE1 calls, but an automatic PRELUDE1 call can be
nested within explicit subroutine and subprogram calls.
PRELUDE0 disables any automatic subroutine call.