Siemens HT6

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03.04 Appendix

B Terms

Program block

Program blocks contain the main programs and subprograms for the -

> parts programs.

Programmable frames

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

controller

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.

Programmable working

area limitation

Limitation of the motion space of the tool to a space defined by

programmed limitations.

Programming device

Programming key

Characters and character sequences, which have a defined meaning

in the programming language for -> parts programs (see programming

guide).

Protection zone

Three-dimensional space within the -> working area which the tool tip

is not permitted to enter.

Quadrant error

compensation

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.

Rapid traverse

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.

SINUMERIK 840D/840Di/810D Operator’s Guide Handheld Terminal 6 (BAH) - 03.04 Edition A-159