Glossary
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Glossary-5
Contour
Contour of the → workpiece
Contour monitoring
The following error is monitored within a definable tolerance band as a measure of contour
accuracy. An unacceptably high following error can cause the drive to become overloaded,
for example. In this case, an alarm occurs and the axes are stopped.
Coordinate system
See → Machine coordinate system, → Workpiece coordinate system
CPU
Central processing unit, see → Programmable logic control
C-spline
C-spline is the best known and most frequently used spline. The transitions at the
interpolation points are tangentially continuous and have constant curvature. A third-degree
polynomial is used.
Cycle
Protected subroutine for implementing a repetitious machining operation on the → workpiece.
Data block
1. Data unit of the → PLC that → HIGHSTEP programs can access.
2. Data unit of the → NC: Data blocks contain the data definitions for global user data. The
data can be installed directly in the definition.
Data word
Two-byte data unit within a → data block.
Diagnostics
1. Control operating area
2. The control has both a self-diagnostics program and testing aids for the service: status,
alarm, and service displays
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