Ncu Link; General Information - Siemens SINUMERIK 840D sl Function Manual

2.1.4

NCU link

2.1.4.1

General information

Use
The NCU link, the link between several NCU units of an installation, is used in distributed
system configurations.
When there is a high demand for axes and channels, e.g. in case of revolving machines and
multi-spindle machines, the computing capacity, configuration options and memory areas
can reach their practical limits when only one NCU is used. Several NCUs interconnected
with an NCU link module provide a scalable solution which fully meets the requirements of
machine tools of this type. The NCU-Link module offers fast NCU-NCU communication
based on a synchronized 12 Mbaud PROFIBUS interface.
Note
NCU-Link is available in case of SINUMERIK 840D with link module and HMI Advanced.
If Safety Integrated (SI) is used in machines with NCU Link, then it is possible, when:
• the configuration of the system-integrated SI functions does not include the link,
• in the configuration of the safety-oriented inputs/outputs (SGE/SGA) no safety-oriented
However, if axial system-integrated SI functions of link or container-link axes are still used,
then this is done under the responsibility of the machine manufacturer. Hence there are
boundary conditions for the SI functions Stop D/E, SG, SE, SN, as well as for
commissioning, diagnosis and for the SI acceptance test.
Support can be provided by the Center of Competence Service (CoCS) - SINUMERIK
Safety Integrated. Please contact the telephone numbers and addresses given in the
foreword under Technical Support.
Extended Functions
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Several Operator Panels on Several NCUs, Distributed Systems (B3)
WARNING
containerlink and/or lead-link axes.
signal exchange is necessary between the controls involved, or the signal exchange
between the controls involved takes place exclusively via the safety-oriented
inputs/outputs (SGE/SGA) in accordance with the functional description of Safety
Integrated (e.g. consideration of the 3-terminal concept).
Brief description
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