Siemens SIMATIC S7-1200 Manual page 155

Other services and functions of the CP 1242-7
● Time-of-day synchronization of the CP via the Internet
● Interim buffering of messages to be sent if there are connection problems
● Logging the volume of data
Configuration and module replacement
To configure the module, the following configuration tool is required:
STEP 7 version V11.0 SP1 or higher
For STEP 7 V11.0 SP1, you also require support package "CP 1242-7" (HSP0003001).
For process data transfer using GPRS, use the telecontrol communications instructions in
the user program of the station.
The configuration data of the CP 1242-7 is stored on the local CPU. This allows simple
replacement of the CP when necessary.
You can insert up to three modules of the CP 1242-7 type per S7-1200. This, for example,
allows redundant communications paths to be established.
Electrical connections
● Power supply of the CP 1242-7
● Wireless interface for the GSM network
Easy Book
Manual, 11/2011, A5E02486774-04
You can set the time on the CP as follows:
– In "Telecontrol" mode, the time of day is transferred by the telecontrol server. The CP
uses this to set its time.
– In "GPRS direct" mode, the CP can request the time using SNTP.
To synchronize the CPU time, you can read out the current time from the CP using a
block.
The volumes of data transferred are logged and can be evaluated for specific purposes.
The CP has a separate connection for the external 24 VDC power supply.
An extra antenna is required for GSM communication. This is connected via the SMA
socket of the CP.
Easy to communicate between devices
7.9 GPRS
155