Siemens SIMATIC NET S7-300 Manual page 28

1 Communication via Ethernet CPs in S7 Stations
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 or subnet type (PROFIBUS / Ethernet) via routers (for
example, an IE/PB Link); in this case, S7 stations are servers.
S7 communication is possible over a gateway.
S7 - 400
Ethernet
PROFIBUS
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 /2/.
A -28
S7 - 300
Ethernet CP
PUT / GET
PC/PG Station
S7-CPs for Industrial Ethernet Configuring and Commissioning
Ethernet CP
PC/PG Station
Ethernet
IE/PB Link
PUT / GET
C79000-G8976-C182-07
Release 01/2007