Siemens S7-1200 Operating Instructions Manual page 71

● TCP connection monitoring time
The monitoring time is specified at a higher level for the Ethernet interface as the default
for all configured TCP connections, see also section Ethernet interface (X1) (Page 67).
The default value for the Ethernet interface can be adapted for the connection to the
telecontrol server individually in the "Partner stations" parameter group. If the monitoring
time in the "Partner stations" parameter group has a different value from the monitoring
time in the Ethernet interface parameter group, the monitoring time of the "Partner
stations" parameter group is used.
Function: If there is no data traffic within the connection monitoring time, the CP sends a
keepalive to the telecontrol server.
Permitted range: 0 to 65535 s. Default: 180 s.
If you enter 0 (zero), the function is disabled.
● TCP keepalive monitoring time
If the value configured here differs from the value configured in the Ethernet interface
parameter group, the monitoring time of the "Partner stations" parameter group is used.
After sending a keepalive, the CP expects a reply from the communications partner within
the keepalive monitoring time. If the CP does not receive a reply within the configured
time, it terminates the connection. Permitted range: 0 to 65535 s. Default: 1 s. If you enter
0 (zero), the function is deactivated. The monitoring time is configured for the Ethernet
interface as the default for all TCP connections. The default value can be adapted
individually for each connection in "Partner stations".
● Connection establishment
Specifies the communications partner that establishes the connection (always the CP).
● Partner port
Number of the listener port of the telecontrol server.
CP 1243-7 LTE
Operating Instructions, 01/2015, C79000-G8976-C381-01
4.15 STEP 7 configuration of individual parameters
Configuration and operation
71