A
03.04 Appendix
B Terms
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 blocks: these blocks contain the STEP 7 commands.
Data blocks: these blocks contain the constants and variables for the
STEP 7 program.
V
Variable definition
A variable definition includes the specification of a data type and a
variable name. Variable names can be used to access the value of
the variables.
Velocity control
In order to be able to achieve an acceptable traversing velocity on
very short traverse movements within a single block, predictive
velocity control can be set over several blocks (-> look ahead).
Vocabulary words
Words with a specific notation, which have a defined meaning in the
programming language for -> parts programs.
W
Working area
Three-dimensional zone into which the tool tip can be moved on
account of the physical design of the machine tool.
See also -> protection zone.
Working area limitation
With the aid of the working area limitation, the traversing range of the
axes can be further restricted in addition to the limit switches. One
value pair per axis may be used to describe the protected working
area.
Working memory
The working area is a RAM area in the -> CPU which is accessed by
the processor to access the user program during program execution .
Workpiece
Part to be created/machined by the machine tool.
Workpiece contour
Setpoint contour of the -> workpiece to be created/machined.
Workpiece coordinate
system
The starting position of the workpiece coordinate system is the ->
workpiece zero. In machining operations programmed in the
workpiece coordinate system, the dimensions and directions refer to
this system.
Siemens AG, 2004. All rights reserved.
SINUMERIK 840D/840Di/810D Operator’s Guide Handheld Terminal 6 (BAH) - 03.04 Edition A-165
To Next Page
Loading...