Glossary
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
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C-Spline
The C-Spline is the most well-known and widely used spline. The transitions at the interpolation points are
continuous, both tangentially and in terms of curvature. 3rd order polynomials are used.
Curvature
The curvature k of a contour is the inverse of radius r of the nestling circle in a contour point (k = 1/r).
Cycles
Protected subroutines for execution of repetitive machining operations on the → workpiece.
Data Block
1. Data unit of the → PLC that → HIGHSTEP programs can access.
2. Data unit of the → NC: Data modules contain data definitions for global user data. These data can be
initialized directly when they are defined.
Data word
Two-byte data unit within a → data block.
Diagnosis
1. Operating area of the control.
2. The control has both a self-diagnostics program as well as test functions for servicing purposes: status, alarm,
and service displays
Dimensions specification, metric and inches
Position and lead values can be programmed in inches in the machining program. Irrespective of the
programmable dimensions (G70/G71), the controller is set to a basic system.
DRF
Differential Resolver Function: NC function which generates an incremental zero offset in Automatic mode in
conjunction with an electronic handwheel.
Drive
The drive is the unit of the CNC that performs the speed and torque control based on the settings of the NC.
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