Interrupt Routine (Asub); Function Of An Interrupt Routine - Siemens SINUMERIK 840D sl Programming Manual

3.3

Interrupt routine (ASUB)

3.3.1

Function of an interrupt routine

Note
The terms "asynchronous subprogram (ASUB)" and "interrupt routine" are used
interchangeably in the description below to refer to the same functionality.
A typical example should clarify the function of an interrupt routine:
The tool breaks during machining. This triggers a signal that stops the current machining
process and simultaneously starts a subprogram – known as an interrupt routine. The interrupt
routine contains all the statements which are to be executed in this case.
When the interrupt routine has finished being executed and the machine is ready to continue
operation, the control jumps back to the main program and continues machining at the point of
interruption – depending on the REPOS command (see "Repositioning at the contour
(Page 852)").
Risk of collision
If a REPOS command has not been programmed in the subprogram, then the control goes to
the end point of the block that follows the interrupted block.
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
CAUTION
interrupt routine
Retraction from the
contour
Tool change
New correction
values
Repositioning
Main
program
Work preparation
3.3 Interrupt routine (ASUB)
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