Glossary
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
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Serial RS-232-C interface
For data input/output, the PCU20 has one serial V.24 interface (RS232) while the PCU50/70 has two V.24
interfaces. Machining programs and manufacturer and user data can be loaded and saved via these interfaces.
Setting data
Data, which communicates the properties of the machine tool to the NC, as defined by the system software.
Softkey
A key, whose name appears on an area of the screen. The choice of soft keys displayed is dynamically adapted
to the operating situation. The freely assignable function keys (soft keys) are assigned defined functions in the
software.
Software limit switch
Software limit switches limit the traversing range of an axis and prevent an abrupt stop of the slide at the
hardware limit switch. Two value pairs can be specified for each axis and activated separately by means of the →
PLC.
Spline interpolation
With spline interpolation, the controller can generate a smooth curve characteristic from only a few specified
interpolation points of a set contour.
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
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