System overview
2.3 Variants
NCU 7x0.3 PN
16 Manual, 09/2011, 6FC5397-1EP40-0BA0
The SINUMERIK 840D sl offers integrated PROFINET functionality. Supported:
● PROFINET CBA
The CBA functionality integrated in the NCU allows users to modularize machinery and
systems: Rapid real-time communication (up to 10 ms) between the controllers means
that systems lend themselves better to standardization and can be reused or expanded
more easily. Response to customer demands is faster and more flexible and startup is
simplified and speeded up by pretesting at component level.
● PROFINET IO
As part of PROFINET, PROFINET IO is a communication concept that is used to
implement modular, distributed applications. PROFINET IO is based on Industrial
Ethernet and allows distributed field and I/O equipment to be connected to the central
processing unit.
128 PROFINET IO devices can be operated on the NCU as an IO controller.
2.3 Variants
The scalability of the hardware and software – both from a CNC perspective and in terms of
operation – means the SINUMERIK 840D sl can be used in many sectors. The possibilities
range from simple positioning tasks up to complex multi-axis systems.
Application areas and performance
● As many as 8 axes can be implemented on an NCU 710. The NCU 710 can be expanded
by up to 2 NX modules. One possible benefit would be increased drive control
performance.
● On the NCU 720/730, the number of axes and/or the performance of the drive controller
can be increased to 31 axes. This is achieved through the use of the NX modules. The
NCU 720/730 can be expanded by up to 5 NX modules for increased performance of the
drive control and number of axes.
● Use of an NCU 730 is recommended for maximum dynamics and accuracy in mold
making or in the high speed cutting sector.
The following table shows the essential features of the various Control Units:
Table 2- 1 Versions
Property NCU 710 .3 PN NCU 720.3 PN NCU 730.3 PN
Cooling ribs No No Yes
DRIVE CLiQ ports 4 6 6
Axes Up to 8 Up to 31 Up to 31
NX10.3 / 15.3 Up to 2 Up to 3/Up to 5 Up to 3/Up to 5
TCU Up to 2 Up to 4 Up to 4
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