Siemens SINUMERIK 810D - Page 486

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Appendix 03.04
B Terms
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Ó Siemens AG, 2004. All rights reserved
A-486 SINUMERIK 840D/840Di/810D Operator’s Guide HMI Advanced (BAD) – 03.04 Edition
Multipoint interface
The multipoint interface (MPI) is a 9-pin sub-D port. A parameterizable
number of devices can be connected to an MPI for the purpose of
communicating with one another:
· Programming devices
· MMI (HMI) systems
· Other automation systems
The "Multipoint Interface MPI" parameter block of the CPU contains
the -> parameters which define the properties of the multipoint
interface.
N
NC
Numerical Control It incorporates all the components of the machine
tool control system: -> NCK, -> PLC, -> MMC, -> COM.
Note: CNC (computerized numerical control) would be a more
appropriate description for the SINUMERIK 840D control or FM-NC :
computerized numerical control.
NCK
Numerical Control Kernel: Component of the NC control which
executes -> parts programs and essentially coordinates the
movements on the machine tool.
Network
A network is the interconnection of several S7-300s and other
terminal devices such as a programming device, for example,
interlinked by means of -> connecting cables. The networked devices
interchange data via the network.
Node number
The node number is the "contact address" of a -> CPU or the ->
programming device or another intelligent I/O module if these devices
are exchanging data with one another via a -> network. The node
number is assigned to the CPU or the programming device
by the S7 tool -> "S7 Configuration".
NRK
Numeric Robotic Kernel (operating system of the -> NCK)
NURBS
Motion control and path interpolation are implemented internally in the
control on the basis of NURBS (Non-Uniform Rational B Splines). A
standard procedure is thus available (SINUMERIK 840D) as an
internal control function for all modes of interpolation.
O
Oblique-plane machining
Drilling and milling operations on workpiece surfaces which are
oblique to the coordinate planes of the machine are supported by the
"Oblique surface machining" function.