Glossary
Job planning
Glossary-20 Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
Tool Nose Radius Compensation
Contour programming assumes that the tool is pointed. Because this is not actually the case
in practice, the curvature radius of the utilized tool must be communicated to the control
which then takes it into account. The curvature center is maintained equidistantly around the
contour offset by the radius of curvature.
Tool offset
Consideration of the tool dimensions in calculating the path.
Tool radius compensation
To directly program a desired → workpiece contour, the control must traverse an equistant
path to the programmed contour taking into account the radius of the tool that is being used
(G41/G42).
Transformation
Additive or absolute work offset of an axis.
Traversing range
The maximum permissible traversing range for linear axes is ± 9 decades. The absolute
value depends on the selected input and positioning resolutions and the basic unit system
used (inches or metric).
User interface
The user interface (UI) is the display medium for a CNC control in the form of a screen. It is
laid out with horizontal and vertical softkeys.
User memory
All program and data, such as part programs, subroutines, comments, tool compensations,
and work offsets/frames, as well as channel- and program user data can be stored in the
shared CNC user memory.
User program
User programs for the S7-300 automation systems are created using the programming
language STEP 7. The user program has a modular layout and consists of individual blocks.
The basic block types are:
code modules: these blocks contain the STEP 7 commands.
Data blocks: these blocks contain the constants and variables for the STEP 7 program.
User-defined variable
The user can declare user-defined variables for any use in the -> parts program or data
block (global user data). A definition contains a data type specification and the variable
name. See -> system variable.
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