Subprogram With Call-By-Reference Parameter Transfer (Proc, Var) - Siemens SINUMERIK 840D sl Programming Manual

Flexible NC programming
1.25 Subprogram technique
1.25.2.3

Subprogram with call-by-reference parameter transfer (PROC, VAR)

Function
A subprogram with call-by-reference parameter transfer is defined using the PROC keyword
followed by the name of the program and a complete list of all the parameters expected by
the subprogram, with the VAR keyword, type and name. The definition operation must appear
in the first program line.
With call-by-reference parameter transfer, references to arrays can also be transferred.
Call-by-reference parameter transfer affects the calling program. The calling program
transfers a reference to the actual parameter to the subprogram, thereby providing the
subprogram with direct access to the corresponding variable.
Note
A maximum of 127 parameters can be transferred.
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Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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