Siemens SINUMERIK 840DE Programming Manual page 484

Glossary
Frame
A frame is an arithmetic rule that transforms one Cartesian coordinate system into another
Cartesian coordinate system. A frame contains the components -> zero offset, -> rotation, ->
scaling, -> mirroring.
Geometry
Description of a -> workpiece in the -> workpiece coordinate system.
Geometry axis
Geometry axes are used to describe a 2- or 3-dimensional range in the workpiece coordinate
system.
Global main program/subroutine
Every global main program/subroutine can only appear once under its own name in the
directory, and it is not possible to have the same program name in different directories with
different contents as a global program.
Ground
Ground is taken as the total of all linked inactive parts of a device, which will not become live
with a dangerous contact voltage even in the event of a malfunction.
Helical interpolation
Helical interpolation is especially suitable for easy machining inside or outside threads with
form cutters and for milling lubrication grooves. The helix consists of two motions:
1. A circular movement in one plane
2. A linear movement perpendicular to this plane
High-level CNC language
The high-level language offers: -> user-defined variable, -> system variable, -> macro
techniques.
High-speed digital inputs/outputs
The digital inputs can be used for example to start fast CNC program routines (interrupt
routines). The digital CNC outputs can be used to trigger fast, program-controlled switching
functions (SINUMERIK 840D).
HIGHSTEP
Summary of the programming options for the -> PLC in the AS300/AS400 system.
Glossary-8
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals