Siemens SINUMERIK 840D sl Programming Manual page 201

2. If the subprogram was not found under 1., the directories of the user memory are
The search ends when the subprogram is found for the first time. If the subprogram is not
found, the program execution is aborted with the
Adjustable reload memory (FIFO buffer)
A reload memory is required for the execution of an external subprogram. The size of the
reload memory is preset with 30KB and can only be changed by the machine manufacturer
(using MD18360 MM_EXT_PROG_BUFFER_SIZE).
Note
Subprograms with jump commands
For external subprograms that contain jump commands (
REPEAT
Note
ShopMill/ShopTurn programs
The contour descriptions added at the file end mean the ShopMill and ShopTurn programs
must be stored completely in the read-only memory.
A separate reload memory is required for external subprograms executed in parallel.
Reset / end of program / POWER ON
Reset and POWER ON cause external subprogram calls to be interrupted and the
associated reload memory to be erased.
A subprogram selected for "Execution from external source" remains selected for "Execution
from external source" after a reset / end of program. A POWER ON deletes the selection.
References
Further information on "Execution from external source" can be found in:
Function Manual, Basic Functions, Mode Group, Channel, Program Operation, Reset
Behavior (K1)
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
searched.
, , , etc.) the jump destinations must lie within the post loading memory.
IF ELSE ENDIF
Flexible NC programming
1.24 Subprogram technique
call.
EXTCALL
, ,
GOTOF GOTOB CASE
, , , ,
FOR LOOP WHILE
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