Siemens SINUMERIK 840D sl Programming Manual page 584

Glossary
SRT
Transformation ratio
Standard cycles
Standard cycles are provided for machining operations, which are frequently repeated:
• Cycles for drilling/milling applications
• for turning technology
The available cycles are listed in the "Cycle support" menu in the "Program" operating area.
Once the desired machining cycle has been selected, the parameters required for assigning
values are displayed in plain text.
Subblock
Block preceded by "N" containing information for a sequence, e.g. positional data.
Subroutine
The term "subprogram" has its origins during the time when part programs were split strictly
into → main and subprograms. This strict division no longer exists with today's SINUMERIK
NC language. In principle, any part program or any → cycle can be called up as a
subprogram within another part program. It then runs through in the next → program level
(x+1) (subprogram level (x+1)).
Synchronization
Statements in → part programs for coordination of sequences in different → channels at
certain machining points.
Synchronized Actions
1. Auxiliary function output
During workpiece machining, technological functions ( → auxiliary functions) can be
output from the CNC program to the PLC. For example, these auxiliary functions are used
to control additional equipment for the machine tool, such as quills, grabbers, clamping
chucks, etc.
2. Fast auxiliary function output
For time-critical switching functions, the acknowledgement times for the → auxiliary
functions can be minimized and unnecessary hold points in the machining process can be
avoided.
Synchronized axes
Synchronized axes take the same time to traverse their path as the geometry axes take for
their path.
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Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals