M:n Communication Links - Siemens SINUMERIK 840D Operator's Manual

2
Operator Components/Operating Sequences
2.5 General operating sequences

2.5.9 m:n communication links

General
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References
2-60
2. Channel active
A program has been started, program execution or reference point
approach is in progress.
3. Channel interrupted
The running program or reference point approach has been
interrupted.
In this context a program can be a main program, subprogram, cycle
or a series of NC blocks.
There are 3 different switchover levels:
1. Switch to next channel.
2. Switch over configured channel group/channels (1 NC).
3. Switch to another NC (with m:n link involving several NCs).
An m:n link means that m-HMI Embedded-units and n-NCU/PLC-units
are linked together. This does not however mean that all possible
links are active.
An HMI Embedded is linked with only one NC at a given point in time
(cf. 1:1 link) and communicates only with this NC. With an m:n link,
the link can also be switched over to another NC. Using the channel
switchover key and channel menu, you can switch the MMC over to
another link.
You can change to the channel menu in all operating areas by
activating the channel switchover key. The only change is to the
horizontal and vertical softkeys.
Use the horizontal softkeys to select a channel group (max. 8),
8 links to channels on different NCUs can be set up in each channel
group.
All current communication links and associated symbol names are
listed in display "Channel menu".
Important
Only two links may be active simultaneously on one NCU.
/FB2/B3: Several Operator Panels and NCUs
SINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition
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03.04
 Siemens AG, 2004. All rights reserved