Siemens S7-1200 Operating Instructions Manual page 23

In the telecontrol applications, the CP communicates with a telecontrol server with an
Internet connection via the mobile wireless network. The "TeleControl Server Basic V3"
(TCSB) application is installed on the telecontrol server in the master station. This results in
the following use cases:
● Communication between a station and a control room with OPC client
The station communicates with the telecontrol server. Using its integrated OPC server,
the telecontrol server exchanges data with the OPC client of the control room.
The OPC client and telecontrol server can be located on a single computer, for example
when TCSB is installed on a control center computer with WinCC.
● Inter-station communication via a control center
Inter-station communication is possible with S7 stations equipped with a suitable
telecontrol CP: CP 1243-1, CP 1242-7 GPRS V2, CP 1243-7 LTE
To allow inter-station communication, the telecontrol server forwards the messages of the
sending station to the receiving station.
Direct communication between stations
Figure 1-3
In this configuration, two SIMATIC S7-1200 stations communicate directly with each other
using the CP via the mobile wireless network. Each CP has a fixed IP address. The relevant
service of the network provider must allow this.
TeleService via the mobile wireless network
In TeleService via the mobile wireless network, an engineering station on which STEP 7 is
installed communicates via the mobile wireless network and the Internet with the CP in the
S7-1200.
Since the firewall of the network provider is normally closed for connection requests from the
outside, a switching station between the remote station and the engineering station is
required. This switching station can be a telecontrol server or, if there is no telecontrol server
in the configuration, a TeleService gateway.
CP 1243-7 LTE
Operating Instructions, 01/2015, C79000-G8976-C381-01
Direct communication between two S7-1200 stations
Application and properties
1.6 Configuration examples
23