Application and properties
1.7 Configuration examples
CP 1242-7
Operating Instructions, 09/2011, C79000-G8976-C247-02
17
TeleService via GPRS
In TeleService via GPRS, an engineering station on which STEP 7 is installed communicates
via the GSM network and the Internet with the CP 1242-7 in the S7-1200.
Since a firewall 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.
●
Configuration with telecontrol server:
The connection runs via the telecontrol server.
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The engineering station and telecontrol server are connected via the Intranet (LAN) or
Internet.
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The telecontrol server and remote station are connected via the Internet and via the
GSM 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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Figure 1-4
TeleService via GPRS in a configuration with telecontrol server