Application and properties
CP 1242-7 V2
Operating Instructions, 05/2014, C79000-G8976-C311-00
13
Frame buffer
The CP supports data buffering in the "Telecontrol" mode. In this case, the CP is connected
to a telecontrol server as a communication partner (the "RemoteWdcAddress" = DW#16#0 is
in the data block TCON_WDC).
The storage of frames is initiated when there is a break on the connection to the telecontrol
server:
With send jobs with up to 1254 bytes of user data:
Maximum 2000 frames
With send jobs with 1255 to 2048 bytes of user data:
Maximum 1000 frames
1.5
Requirements for operation
Hardware requirements
Apart from the CP 1242-7 GPRS V2 in the remote S7-1200, the following hardware is also
required:
A CPU with firmware version as of V2.0
An external antenna for the CP 1242-7 GPRS V2, see Accessories (Page 63)
In the "Telecontrol" mode of the CP 1242-7 GPRS V2, a PC with Internet access is
required for the central telecontrol server.
If you intend to use TeleService via GPRS, a TeleService gateway with Internet access is
required for configurations without a telecontrol server. This is a PC on which the
"TS Gateway" software is installed, see Accessories (Page 63).
Configuration software
To configure the module, the following configuration tool is required:
STEP 7 Basic V12.x
Program blocks (instructions)
The telecontrol program blocks are required for productive communication. They run on the
CPU. For a description of the program blocks, refer to the section Configuration and
programming (Page 45).
For TeleService, the telecontrol program blocks are not necessary.
