Siemens SINUMERIK 840D Operator's Manual page 159

A
03.04
Program block
Programmable frames
Programmable logic
controller
Programmable working
area limitation
Programming device
Programming key
Protection zone
Q
Quadrant error
compensation
R
Rapid traverse
 Siemens AG, 2004. All rights reserved.
SINUMERIK 840D/840Di/810D Operator's Guide Handheld Terminal 6 (BAH) - 03.04 Edition
Program blocks contain the main programs and subprograms for the -
> parts programs.
Programmable -> frames can be used to define new coordinate
system starting points dynamically while the parts program is running.
A distinction is made between absolute definition using a new frame
and additive definition with reference to an existing starting point.
Programmable logic controllers (PLC) are electronic controls, the
function of which is stored as a program in the control unit. This
means that the layout and wiring of the device do not depend on the
function of the control. The programmable logic controller has the
same structure as a computer; it consists of a CPU (central module)
with memory, input/output modules and an internal bus system. The
peripherals and the programming language are matched to the
requirements of the control technology.
Limitation of the motion space of the tool to a space defined by
programmed limitations.
Programming device
Characters and character sequences, which have a defined meaning
in the programming language for -> parts programs (see programming
guide).
Three-dimensional space within the -> working area which the tool tip
is not permitted to enter.
Contour errors at quadrant transitions, which arise as a result of
changing friction conditions on the guideways, can be virtually entirely
eliminated with the quadrant error compensation. Parameterization of
the quadrant error compensation is performed by means of a circuit
test.
The highest speed of an axis. It is used for example to move the tool
from rest position to the -> workpiece contour or retract the tool from
the contour.
A
Appendix
B Terms
A-159