Siemens SINUMERIK 840D sl Programming Manual page 88

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Subroutines, Macros

2.2 Subroutines with SAVE mechanism

In the subroutine

PROC subroutine name SAVE

The SAVE attribute sets modal G functions to the same value at the end of subroutines that

they had at the beginning. If this action results in a change to the

G function group 8 (settable zero offset)

G function group 52 (frame rotations of a rotational workpiece)

G function group 53 (frame rotation in direction of tool),

then the relevant frames are restored.

• The active basic frame is not changed when the subroutine returns

• The programmable zero offset is restored

The behavior of the settable zero shift and the basic frame can be changed using the

machine data MD 10617: FRAME_SAVE_MASK.

For more information on this, see

/FB1/ Function Manual Basic Functions; Axes, Coordinate Systems, Frames (K2), "Sub-

routine return with SAVE".

Subroutine definition

PROC CONTOUR (REAL VALUE1) SAVE

Main program

N10 G0 X... Y... G90

N50 CONTOUR (12.4)

N60 X... Y...

In the CONTOUR subroutine G91 incremental dimension applies. After returning to the main

program, absolute dimension applies again because the modal functions of the main

program were stored with SAVE.

Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0

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