Siemens SINUMERIK 840D Operator's Manual page 162

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Appendix
B Terms
Software limit switches
Spindles
Spline interpolation
Standard cycles
Structure
Subblock
Subprogram
Synchronization
A-162
Software limit switches limit the traversing range of an axis and
prevent the slide from striking the hardware limit switch. 2 pairs of
values can be assigned on each axis, which can then be activated
separately via the -> PLC.
The spindle functionality is divided into two power ranges.
1. Spindles: Speed or position-controlled analog spindle drives
+10V (SINUMERIK FM-NC)
digital (SINUMERIK 840D)
2. Auxiliary spindles: speed-controlled spindle drives, "auxiliary
spindle" function package e.g. for driven tools.
Using spline interpolation, the control can obtain a very smooth curve
from just a few defined interpolation points along a set contour.
Standard cycles are available for frequently recurring machining
tasks.
• for drilling/milling technology
• for turning technology (SINUMERIK FM-NC)
In the "Program" operating area, the available cycles are listed under
the menu "Cycle Support". After selecting the desired machining cycle
the required parameters for the value assignment are displayed in
clear text.
• The SINUMERIK FM-NC is integrated into the CPU
row of the SIMATIC S7-300. The module is 200 mm wide and fully
encapsulated, with the same external structure as the
SIMATIC S7-300 modules.
• The SINUMERIK 840D is integrated as a compact module into the
SIMODRIVE 611D converter system. The dimensions correspond
to a 50 mm wide SIMODRIVE 611D module. The SINUMERIK
840D module comprises the NCU module and the NCU box.
Block prefixed by "N" containing information for a machining step such
as position data.
A sequence of instructions in a -> parts program, which can be called
repeatedly with various defining parameters. The subroutine is called
from a main program. It is not possible to block every subroutine
against unauthorized reading and displaying. -> Cycles are a form of
subroutine.
Instructions in -> parts programs for coordination of sequences in
different -> channels at specific machining points.
SINUMERIK 840D/840Di/810D Operator's Guide Handheld Terminal 6 (BAH) - 03.04 Edition
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03.04
 Siemens AG, 2004. All rights reserved.