Siemens Sinumerik 802D sl Programming Manual page 181

04.07
Multipoint interface
N
NC
NCK
Network
Node number
NRK
NURBS
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SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning - - 04.07 Edition
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.
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 or FM--NC
controls. computerized numerical control.
Numerical Control Kernel: Component of the NC control which
executes --> part programs and essentially coordinates the
movements on the machine tool.
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.
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".
Numeric Robotic Kernel (operating system of the --> NCK)
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.
Terms
B-181