Other Properties Of The Cp - Siemens S7-1200 System Manual

Communication processor and Modbus TCP
12.6 Telecontrol and TeleService with the CP 1242-7
12.6.3

Other properties of the CP

Other services and functions of the CP 1242-7
● Time-of-day synchronization of the CP via the Internet
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
– 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.
● Interim buffering of messages to be sent if there are connection problems
● Increased availability thanks to the option of connecting to a substitute telecontrol server
● Optimized data volume (temporary connection)
As an alternative to a permanent connection to the telecontrol server, the CP can be
configured in STEP 7 with a temporary connection to the telecontrol server. In this case,
a connection to the telecontrol server is established only when required.
● Logging the volume of data
The volumes of data transferred are logged and can be evaluated for specific purposes.
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
The CP has a separate connection for the external 24 VDC power supply.
● Wireless interface for the GSM network
An extra antenna is required for GSM communication. This is connected via the SMA
socket of the CP.
768
uses this to set its time.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG