Siemens SINUMERIK 840D sl Programming Manual page 4

Preface
For the sake of simplicity, this documentation does not contain all detailed information about
all types of the product and cannot cover every conceivable case of installation, operation, or
maintenance.
Definitions
The meanings of some basic terms used in this documentation are given below.
Program
A program is a sequence of instructions to the CNC which combine to produce a specific
workpiece on the machine.
Contour
The term contour refers generally to the outline of a workpiece. More specifically, it also
refers to the section of the program that defines the outline of a workpiece comprising
individual elements.
Cycle
A cycle, such as milling tools/measure drills, is a subroutine specified by HMI sl for carrying
out a recurring machining process.
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Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles