Siemens Sinumerik 840D sl Programming Manual page 476

Path traversing behavior
8.3 Program sequence with preprocessing memory (STOPFIFO, STARTFIFO, FIFOCTRL, STOPRE)
Syntax
Table 8-1
STOPFIFO
...
STARTFIFO
Table 8-2
...
FIFOCTRL
...
Table 8-3
...
STOPRE
...
Note
The STOPFIFO, STARTFIFO, FIFOCTRL, and STOPRE commands have to be programmed
in a separate block.
Significance
STOPFIFO:
STARTFIFO:
FIFOCTRL:
STOPRE:
476
Identify machining step:
Automatic preprocessing memory control:
Preprocessing stop:
STOPFIFO identifies the start of a machining step to be buffered in the
preprocessing memory. STOPFIFO stops processing and fills the
preprocessing memory until:
• STARTFIFO or STOPRE is detected
or
• The preprocessing memory is full
or
• The end of the program is reached
STARTFIFO starts rapid processing of the machining step; the
preprocessing memory is filled in parallel to this.
Activation of automatic preprocessing memory control
Stop preprocessing
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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