Subprogram With Call-By-Reference Parameter Transfer (Proc, Var) - Siemens SINUMERIK 828D Programming Manual

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

A subprogram with call-by-reference parameter transfer is defined using the

followed by the name of the program and a complete list of all the parameters expected by

the subprogram, with the

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.

A maximum of 127 parameters can be transferred.

Call-by-reference parameter transfer is then only necessary if the transferred variable was

defined in the calling program (LUD). Channel-global or NC-global variables do not have to

be transferred, since these cannot be accessed directly from within the subprogram.

Job planning

Programming Manual, 07/2010, 6FC5398-2BP40-0BA0

keyword, type and name. The definition operation must appear

Flexible NC programming

1.25 Subprogram technique

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