Siemens 6AV6651-7KA01-3AA4 - S7-1200 + KTP400 Basic Starter Kit 6AV6651-7KA01-3AA4 사용자 설명서

Easy to communicate between devices 

 

7.9 GPRS 

 

Easy Book 

160

 

Manual, 03/2014, A5E02486774-AF 

In TeleService via GPRS, an engineering station on which STEP 7 is installed communicates 

via the GSM network and the Internet with a SIMATIC S7-1200 station with a CP 1242-7. 

The connection runs via a telecontrol server that serves as an intermediary and is connected 

to the Internet. 
The CP 1242-7 can be used for the following applications: 

Telecontrol applications   

●  Sending messages by SMS 

Via the CP 1242-7, 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 

Remote S7-1200 stations communicate via the GSM network and the Internet with a 

telecontrol server in the master station. For data transfer using GPRS, the 

"TELECONTROL SERVER BASIC" application is installed on the telecontrol server in the 

master station. The telecontrol server communicates with a higher-level central control 

system using the integrated OPC server function. 

●  Inter-station communication between S7-1200 stations via a GSM network 

Inter-station communication between remote stations with a CP 1242-7 can be handled in 

two different ways: 
–  Indirect communication via a master station 

In this configuration, a permanent secure connection between S7-1200 stations that 

communicate with each other and the telecontrol server is established in the master 

station. Communication between the stations is via the telecontrol server. The 

CP 1242-7 operates in "Telecontrol" mode. 

–  Direct communication between the stations 

For direct communication between stations without the detour via the master station, 

SIM cards with a fixed IP address are used that allow the stations to address each 

other directly. The possible communications services and security functions (for 

example VPN) depend on what is offered by the network provider. The CP 1242-7 

operates in "GPRS direct" mode. 

TeleService via GPRS   

A TeleService connection can be established between an engineering station with STEP 7 

and a remote S7-1200 station with a CP 1242-7 via the GSM network and the Internet. The 

connection runs from the engineering station via a telecontrol server or a TeleService 

gateway that acts as an intermediary forwarding frames and establishing the authorization. 

These PCs use the functions of the "TELECONTROL SERVER BASIC" application. 
You can use the TeleService connection for the following purposes: 
●  Downloading configuration or program data from the STEP 7 project to the station 
●  Querying diagnostics data on the station