Siemens S7-300 Configuration Manual page 22

Communication via Ethernet CPs in S7 stations
1.4 PG/OP communication via Industrial Ethernet
● local via Ethernet modules on the PG;
● remote via Ethernet modules on the PG and via routers.
● (the option of a PGPLC remote link with TeleService over a TS adapter is also shown)
Figure 1-1
22
Configuration for PG/OP mode - local and remote
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13