Siemens SINUMERIK 840D sl Function Manual page 80

B3: Several operator panels connected to several NCUs, distributed systems - only 840D sl
2.1 Brief description
Figure 2-1 Topology of distributed system configurations
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80
PLC-PLC communication entails one of the following:
- PLC-PLC cross-communication master, slave comm.)
or
- Local PLC I/Os
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extended Functions