Communications Services - Siemens S7-1200 Operating Instructions Manual

1.2

Communications services

The CP is intended for use in an industrial environment. The following applications are
supported by the CP:
Telecontrol communication
The following applications are possible if telecontrol communication is enabled in the
configuration of the CP.
● Communication with a control center
Remote S7-1200 stations communicate via the mobile wireless 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.
● Event-driven sending of messages using SMS or e-mail
Via the mobile wireless network, the CP sends SMS messages to mobile phones or e-
mails to PCs with an Internet connection.
Both types of messages are configured in telecontrol communication in STEP 7. The use
of program blocks is not necessary.
For information on the configuration, refer to sections E-mail configuration (Page 75) and
Messages (Page 86).
● Inter-station communication between S7-1200 stations via the telecontrol server
In this application, the CP establishes a connection to the telecontrol server via the
mobile wireless network. The telecontrol server forwards the messages to the destination
station.
For this communications service, the CP and TCSB use their own protocol on OSI layer 7
that among other things supports certain security functions, see section Other services and
properties (Page 14).
Direct communication via Open User Communication (OUC)
The program blocks of Open User Communication provide the CP with the following
communication options:
● Communication between S7-1200 stations via the mobile wireless network
For this, the CP must be assigned a fixed IP address, see section Other services and
properties (Page 14).
● SMS and e-mail messages via the mobile wireless network
– Sending and receiving SMS messages on mobile phones or S7 stations
– Sending e-mails to PCs with an Internet connection
In contrast to the two corresponding services of telecontrol communication (see above),
to transfer SMS messages/e-mails via OUC, program blocks need to be used, see
section Program blocks for OUC (Page 91).
You will find examples of applications in the section Configuration examples (Page 21).
CP 1243-7 LTE
Operating Instructions, 01/2015, C79000-G8976-C381-01
Application and properties
1.2 Communications services
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