HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 327)

HEIDENHAIN CNC PILOT 4290 327
4.36 Subpr
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4.36 Subprograms
Subprogram call: L"xx" V1
The subprogram contains the following elements:
„ L: Identifying letter for subprogram call
„ "xx": Name of the subprogram – file name for external subprograms
(max. 8 letters or numbers)
„ V1: Identification code for external subprograms—omitted for local
subprograms
Note on using subprograms:
„ External subprograms are defined in a separate file. They are called
from any main program, other subprograms, or from TURN PLUS.
„ Local subprograms are in the main program file. They can be called
only from the main program.
„ Subprograms can be nested up to 6 times. Nesting means that
another subprogram is called from within a subprogram.
„ Recursion should be avoided.
„ You can add up to 20 transfer values to a subprogram.
„ Designations: LA to LF, LH, I, J, K, O, P, R, S, U, W, X, Y, Z
„ The identification code within the subprogram is: #__.., followed
by the parameter designation in lowercase letters (for example:
#__la).
„ Use the transfer values when programming with variables within
the subprogram.
„ The variables #256 – #285 are available in every subprogram as local
variables.
„ If a subprogram is to be executed repeatedly, define in the number
repeats Q parameter the number of times the subprogram is to be
repeated.
„ A subprogram ends with RETURN.
The parameter LN is reserved for the transfer of block
numbers. This parameter may receive a new value when
the NC program is renumbered.