Siemens SINUMERIK 840D Operator's Manual page 323

A
03.04
B Terms
A
Absolute dimensions
Acceleration with jerk
limitation
Access authorization
Address
Analog input/output
module
Approach machine
fixed-point
Archiving
A-Spline
Asynchronous
subroutine
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
Key terms are given in alphabetical order. Terms which appear in the
explanatory part and for which there is a separate entry are referred to
with the "->" symbol.
A destination for an axis movement is defined by a dimension that
refers to the origin of the currently active coordinate system. See also
-> incremental dimension.
In order to optimize the acceleration response of the machine whilst
simultaneously protecting the mechanical components, it is possible
to switch over in the machining program between abrupt acceleration
and continuous (jerk-free) acceleration.
The CNC program blocks and data are protected via a 7-stage access
authorization procedure.
• three password levels for system manufacturers, machine
manufacturers and users, plus
• four keyswitch positions which can be evaluated via the PLC.
An address is the identifier for a certain operand or operand range,
e.g. input, output etc.
Analog input/output modules are signal transducers for analog
process signals.
Analog input modules convert analog measured values into digital
values which can be processed in the CPU.
Analog output modules convert digital values into analog output
signals.
Approach motion towards one of the predefined -> fixed machine
points.
Reading out data and/or directories to an external memory device.
The Akima-Spline runs under a continuous tangent through the
programmed interpolation points (3rd order polynomial).
A parts program which can be started asynchronously to
(independently of) the current program status by an interrupt signal
(e.g. "rapid NC input" signal).
A
Appendix
B Terms
A-323