Siemens CP 1243-7 LTE Operating Instructions Manual page 24

Application and properties
1.7 Configuration examples
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.
TeleService with telecontrol server
The connection runs via the telecontrol server.
● The engineering station and telecontrol server are connected via the Intranet (LAN) or
Internet.
● The telecontrol server and remote station are connected via the Internet and via the
mobile wireless network.
The engineering station and telecontrol server can also be the same computer; in other
words, STEP 7 and TCSB are installed on the same computer.
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Direct communication between two S7-1200 stations
Operating Instructions, 04/2017, C79000-G8976-C381-03
CP 1243-7 LTE