User Manual

Easy to communicate between devices
7.9 GPRS
Easy Book
158 Manual, 03/2014, A5E02486774-AF
Telecontrol by a control center
Figure 7-2 Communication between S7-1200 stations and a control center
In telecontrol applications, SIMATIC S7-1200 stations with a CP 1242-7 communicate with a
control center via the GSM network and the Internet. The TELECONTROL SERVER BASIC
application is installed on the telecontrol server in the master station. This results in the
following use cases:
● Telecontrol communication between station and control center
In this use case, data from the field is sent by the stations to the telecontrol server in the
master station via the GSM network and Internet. The telecontrol server is used to control
and monitor remote stations.
● Communication between a station and a control center PC with OPC client
As in the first case, the stations communicate with the telecontrol server. Using the OPC
server of TELECONTROL SERVER BASIC, the telecontrol server exchanges data with a
master station PC. The control center PC could, for example, have WinCC and an
integrated OPC client installed on it.
● Inter-station communication via a control center
To allow inter-station communication, the telecontrol server forwards the messages of the
sending station to the receiving station.