Program Run With Preprocessing Memory (Startfifo, Stopfifo, Stopre) - Siemens SINUMERIK 840D sl Programming Manual

Path traversing behavior

9.6 Program run with preprocessing memory (STARTFIFO, STOPFIFO, STOPRE)

9.6 Program run with preprocessing memory (STARTFIFO, STOPFIFO,
9.6
STOPRE)
Function
Depending on its expansion level, the control system has a certain quantity of so-called
preprocessing memory in which prepared blocks are stored prior to program execution and
then output as high-speed block sequences while machining is in progress.
These sequences allow short paths to be traversed at a high velocity.
Provided that there is sufficient residual control time available, the preprocessing memory is
always filled.
Programming
STARTFIFO
or
STOPFIFO
or
STOPRE
Parameters
STOPFIFO
STARTFIFO
STOPRE
9-42
Stop high-speed processing section, fill preprocessing memory,
until STARTFIFO, "Preprocessing memory full" or "End of
program" is detected.
Start of high-speed processing section, in parallel to filling
the preprocessing memory
Preprocessing stop
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
Job planning