Siemens SINUMERIK 840Di sl Operating Manual page 450

A
Appendix
B Terms
User interface
Mode
Mode group
Identifier
B spline
C
C axis
CNC
C spline
D
Data block
A-450
positioning a loading gantry during machining, can shorten
unproductive times. Here, a CNC channel must be regarded as a
separate CNC control system with decoding, block preparation and
interpolation.
The user interface (UI) is the display medium for a CNC control in the
form of a screen. It is laid out with eight horizontal and eight vertical
softkeys.
An operating concept on a SINUMERIK control. The operating modes
→ Jog, → MDI and → Automatic are defined.
At all times all of the axles/spindles are assigned to precisely one
channel. Each channel is assigned to one operating mode group.
The channels of the mode group are always assigned the same →
mode.
In accordance with DIN 66025, words are supplemented using
identifiers (names) for variables (arithmetic variables, system
variables, user variables), subprograms, key words, and words with
multiple address letters. These supplements have the same meaning
as the words with respect to block format. Identifiers must be unique.
It is not permissible to use the same identifier for different objects.
With the B spline, the programmed positions are not interpolation
points, as they are just "control points" instead. The generated curve
only runs near to the control points, not directly through them (optional
1st, 2nd or 3rd order polynomials).
Axis around which the tool spindle describes a controlled rotational
and positioning movement.
NC
The C spline is the most well-known and widely used spline. The
transitions at the interpolation points are continuous, both tangentially
and in terms of curvature. 3rd order polynomials are used.
1. A data unit on the→ PLC, which can be accessed by →
HIGHSTEP programs.
2. Data unit of the → NC: Data modules contain data definitions for
global user data. These data can be initialized directly when they
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition
A
01/2008
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