Siemens Sinumerik 802D sl Programming Manual page 136

Enhanced Level Commands
4.4 Automating support functions
If skip signal is not turned ON
If the skip signal is not turned ON during the execution of the commands specified
in the G31 block, the operation stops upon completion of these commands and an
alarm occurs. Note that G31 is a non-modal G code.
If G31 is issued while the skip signal input is ON, alarm 21700 is issued.
Operation after skip signal ON
How the axes move after the turning ON of the skip signal varies depending on the
commands specified in the block to be executed next.
When axis move commands in the next block are incremental commands
The position where the skip signal is turned ON is taken as the reference point to
execute the incremental commands in the next block.
Example of programming
G91
G31 Z120.;
G01 X100.;
Fig. 4-40
4-136
X
Example of programming
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
Actual movement
Movement
specified by
the program
120.
Z
Skip signal ON
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04.07
50.