Siemens sinumerik 840d Programming Manual page 101

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Incomplete parameter transfer

In a subprogram call only mandatory values and

parameters can be omitted. In this case, the

parameter in question is assigned the value zero in

the subprogram.

The comma must always be written to indicate the

sequence. If the parameters are at the end of the

sequence you can omit the comma as well.

Back to the last example:

N40 BORDER(15.3, ,5)

The mean value 20.2 was omitted here.

The current parameter of type AXIS must not be

VAR parameters must be passed on completely.

SW 4.4 and higher:

With incomplete parameter transfer, it is possible to

tell by the system variable $P_SUBPAR[i] whether

the transfer parameter was programmed for

subprograms or not.

The system variable contains as argument (i) the

number of the transfer parameter.

The system variable $P_SUBPAR returns

• TRUE, if the transfer parameter was

• FALSE, if no value was set as transfer

If an impermissible parameter number was

specified, part program processing is aborted with

alarm output.

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition

Subprograms, Macros

2.4 Calling subprograms

Main program

N30 LENGTH=15.3 WIDTH=20.2 DEPTH=5

N40 BORDER(15.3,20.2,5)

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