Ncu Link; Link Communication - Siemens SINUMERIK 840D sl Function Manual

B3: Distributed systems - 840D sl only
3.1 Brief description
Configuration, commissioning and parameter assignment
References
● Structure of the system network and commissioning of a TCU:
Operator Components and Networking Commissioning Manual (IM5)
● Configuration of the channel menu
SINUMERIK Operate Commissioning Manual (IM9), Section "Channel menu"
Programming
References
● MCP:
Basic Functions Function Manual, Section "P3 Basic PLC program for SINUMERIK 840D
sl" > "Block descriptions" > "FB 9: MtoN control unit switchover"
3.1.2

NCU link

3.1.2.1

Link communication

The NCU-link communication cycle allows an interpolator clock-synchronous cross-NCU data
exchange for the following applications:
● Cross-NCU data exchange via link variable $A_DLx
● Cross-NCU traversing of axes and spindles using link axes and container-link axes
● Cross-NCU master value coupling of axes and spindles using lead-link axes
Safety Integrated
If axial Safety Integrated functions are active for a link axis, data that is not safety-related is
exchanged between the local safety axis (link axis on NCUx) and the channel that is traversing
it (NCUy) via the NCU link. This also enables Safety Integrated-supporting functions for link
axes, such as velocity/speed monitoring-dependent setpoint limiting and higher-order stop
functions (STOP D/E).
Note
The Safety Integrated functions "Safe software limit switch" (SE) and "Safe software cam, safe
cam track" (SN) are not (yet) supported.
Link module
The link communication requires optional link modules. A link module is an optional PROFINET
module for isochronous real-time communication (IRT) via Ethernet. The link module occupies
the option slot of the NCU.
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions