Siemens 6GK7242-7KX30-0XE0 사용자 설명서

 

Application and properties 

 

1.3 Other properties of the CP 

CP 1242-7 
Operating Instructions, 03/2012, C79000-G8976-C247-03 

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1.3 

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 

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. 

●  Buffering frames on the telecontrol server 
●  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 of a variety of data and its transfer to the telecontrol server, for example: 

–  Data volumes transferred 
–  ID of the wireless cell in the area of the station 
–  GSM signal strength 
–  Communication status 

etc. 

1.4 

Performance data 

Types of connection establishment    

The number of connections depends on the type of connection establishment: 
●  Active connection establishment 

The connection establishment is initiated by the local CPU. 

●  Passive connection establishment 

The connection establishment is initiated by the communications partner.