Automating Support Functions; Skip Function (G31) - Siemens SINUMERIK 802D sl Programming Manual

Enhanced Level Commands

4.9 Automating support functions

4.9 Automating support functions
4.9.1

Skip function (G31)

By specifying "G31 X... Y... Z... F... ;", special linear interpolation is executed. If a
skip signal is input during the execution of linear interpolation, linear interpolation is
interrupted and the program advances to the next block without executing the re-
maining linear interpolation.
Delay from the input of the skip signal to the start of processing corresponding to
the input signal is shorter than 0.5 msec; this is processed at extremely high speed.
Format
G31 X... Y... Z... F... ;
G31: One--shot G code (It is effective only in the block in which it is specified)
Explanations
The coordinate values when the skip signal is turned on can be used in a macro
because they are stored as follows:
$AA_MW[X]: Position value in work coordinate system
$AA_MM[X]: Position value in machine coordinate system
In ISO Dialect mode, the PLC signals are evaluated in every block, irrespective of
G31. G31 activates probe1. The deleted distance to go can be calculated via the
PLC Var selector.
Note
An alarm is transmitted whenever the G31 command is issued while cutter com-
pensation is being applied. Before the G31 command is specified, cancel cutter
compensation through the G40 command.
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SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
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04.07