Siemens Simantic Net NCM for Industrial Ethernet S7 - Manual (Page 24)

Communication via Ethernet CPs in S7 Stations
24
SIMATIC NET NCM S7 for Industrial Ethernet
C79000-G8976-C129–06
S
Client and server functionality at one end only (S7 connections
configured at one end)
In the following situations, write and read functions can be implemented with
PUT / GET:
– S7 communication over router
PG/PC stations can access S7 stations if the PG/PC stations are connected
to a different subnet (PROFIBUS / Ethernet) via routers (for example, an
IE/PB Link); in this case, S7 stations are servers.
S7 communication is possible over a gateway.
Ethernet
PROFIBUS
IE/PB Link
PC/PG Station
S7 – 400
S7 – 300
Ethernet CP
Ethernet CP
PUT / GET
Ethernet
PUT / GET
PC/PG Station
Figure 1-4 PC/PG station communicates over a gateway with S7 stations on an underlying PROFIBUS
or Ethernet
For more detailed information on the features supported by your Ethernet CP, refer
to the manual /1/.