Siemens SINUMERIK 840D sl Function Manual page 78

Several Operator Panels on Several NCUs, Distributed Systems (B3)
Brief description
Figure 2-1 Topology of distributed system configurations
*)
78
PLC-PLC communication entails one of the following:
- PLC-PLC cross-communication master, slave comm.)
or
- Local PLC I/Os
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions