Application and properties
CP 1242-7 V2
10
Operating Instructions, 05/2014, C79000-G8976-C311-00
1.2
Applications
The CP 1242-7 GPRS V2 is intended for use in an industrial environment. The following
applications are supported by the CP:
Telecontrol applications
Sending messages by SMS
The function is not dependent on the operating mode of the CP.
Via the CP 1242-7 GPRS V2, the CPU of a remote S7-1200 station can receive SMS
messages from the GSM network or send messages by SMS to a configured mobile
phone or an S7-1200.
Communication with a control center
The CP is configured in "Telecontrol" mode.
Remote S7-1200 stations communicate via the GSM network and the Internet with a
telecontrol server in the master station. The telecontrol server communicates with a
higher-level control system using the integrated OPC server function.
Communication between S7-1200 stations via a GSM network
Depending on the GSM service being used and the mode of the CP, the communication
between remote stations with a CP 1242-7 GPRS V2 will be handled in different ways:
–
Inter-station communication via a master station ("Telecontrol" mode)
In this configuration, connections between S7-1200 stations and the telecontrol server
are established in the master station. The telecontrol server forwards the messages
between the stations.
–
Direct communication between stations ("GPRS direkt" mode)
The CP requires a fixed IP address to be assigned by the GSM network provider.
TeleService via GPRS
A TeleService connection can be established between an engineering station with STEP 7
installed on it and a remote S7-1200 station via the GSM network.
You can use the TeleService connection for the following purposes:
Downloading project or program data from the STEP 7 project to the station
Querying diagnostics data on the station
With TeleService via GPRS, a switching station is required between the remote station and
engineering Station. This switching station can be a telecontrol server or, if there is no
telecontrol server in the configuration, a TeleService gateway. You will find detailed
information about both systems in the documentation , see References.
Other connections are not interrupted by a TeleService connection. You will find examples of
the structure in the section Configuration examples (Page 15).
