Other Properties Of The Cp; Performance Data - Siemens SIMATIC NETS7-1200 Operating Instructions Manual

Application and properties

1.4 Other properties of the CP

1.4 Other properties of the CP
Other services and functions of the CP 1242-7
● Time-of-day synchronization of the CP via the Internet
● Buffering frames on the telecontrol server
● Increased availability thanks to the option of connecting to a substitute telecontrol server
● Optimized data volume (temporary connection)
● Logging of a variety of data and its transfer to the telecontrol server, for example:
1.5

Performance data

Types of connection establishment
The number of connections depends on the type of connection establishment:
● Active connection establishment
● Passive connection establishment
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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.
This time-of-day is adopted in the frames sent by the CP.
– In "GPRS direct" mode, the CP can request the time using NTP.
Make sure that your network provider supports NTP.
The NTP server and the time zone are specified during configuration.
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.
– Data volumes transferred
– ID of the wireless cell in the area of the station
– GSM signal strength
– Communication status
etc.
The connection establishment is initiated by the local CPU.
The connection establishment is initiated by the communications partner.
Operating Instructions, 09/2011, C79000-G8976-C247-02
CP 1242-7