Application and properties
CP 1242-7 V2
Operating Instructions, 05/2014, C79000-G8976-C311-00
11
1.3
Other properties of the CP
Other services and functions of the CP 1242-7 GPRS V2
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.
The time of day of the CP can be read out by the CPU, see the section Reading out time
by CPU (Page 44).
Buffering frames on the telecontrol server
Increased availability thanks to the option of connecting to a substitute telecontrol server
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.
Access to the Web server of the CPU
Via the LAN interface of the CP, you have access to the Web server of the CPU. With the
aid of the Web server of the CPU, you can read out module data from a station. Note the
special description of the Web server; see section Web server
(
http://support.automation.siemens.com/WW/view/en/59193560
) of the Function Manual.
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.
