Siemens SIMATIC NETS7-1200 Operating Instructions Manual page 11

Number of simultaneous connections in "Telecontrol" mode
● 1 reserved connection to the telecontrol server, for example for TeleService
● Max. 5 telecontrol connections (TCON_wdc)
● Max. 5 UDP connections (send only)
Number of simultaneous connections in "GPRS direct" mode
● Max. 1 connection to an NTP server
● Max. 1 TeleService connection
The number of productive connections depends on the type of connection establishment.
● With active connection establishment:
● With passive connection establishment:
User data
User data per send call with the various connection types:
● For telecontrol connections: Max. 2048 bytes
● For ISO-ON-TCP connections: Max. 2048 bytes
● For UDP connections: Max. 1472 bytes
● For SMS: Max. 160 bytes
Data buffering when there is a connection abort
Up to 1000 frames
CP 1242-7
Operating Instructions, 09/2011, C79000-G8976-C247-02
When connection establishment is active also:
A total of maximum 4 connections
– Max. 4 ISO-ON-TCP connections
or
– Max. 4 UDP connections (send only)
or
– A combination of the connection types listed above
Max. 3 ISO-ON-TCP connections
Note
Port 30000 for ISO-ON-TCP
For ISO-ON-TCP, the CP does not use port number 102 but port 30000.
Application and properties
1.5 Performance data
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