Pre-Processing Memory Control Fifoctrl - Siemens SINUMERIK 828D Manual

3.7
Important functions for 3- to 5-axis machining

3.7.8 Pre-processing memory control FIFOCTRL

Mold-making programs are generally executed directly from the hard drive or an external storage
medium (e.g. USB flash drive, CF card). The maximum number of NC blocks that are loaded in
the NC memory can be set via machine data.
During processing of these NC programs, the interpolation memory may run out. In this case, the
NC will stop until data is reloaded. To counter this, the pre-processing memory control
FIFOCTRL is used. For very small distances between points in a mold-making program, it is
necessary to keep the fill level as high as possible in order prevent dropping to 0% (interpolation
dip).
The pre-processing memory control FIFOCTRL is automatically called up by CYCLE832 or
CUST_832. It is deselected with STARTFIFO.
You can open the fill level of the interpolation buffer as follows:
In the Diagnostics menu > select the System utilization softkey.
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