Siemens SIMATIC NET TeleControl S7-1200 CP 1243-1 Operating Instructions Manual page 43

Partner stations > "Telecontrol server > "Connection to partner"
● Partner IP address
IP address or host name (FQDN) of the telecontrol server. This can, for example, also be
the FQDN of a DynDNS service.
If the CP is connected to a TCSB redundancy group (TCSB V3), here configure the public
IP address of the DSL router via which the telecontrol server can be reached from the
Internet. Set the port forwarding on the DSL router so that the public IP address (external
network) is led to the virtual IP address of the TCSB server PCs (internal network). The
station does not therefore receive any information telling it which of the two computers of
the redundancy group it is connected to.
● Connection monitoring
When the function is enabled, the connection to the communications partner (telecontrol
server) is monitored by sending keepalive frames.
The TCP connection monitoring time is set for all TCP connections of the CP in the
parameter group of the Ethernet interface. The setting applies to all TCP connections of
the CP.
Here in the parameter group "Partner stations > Telecontrol server", the globally set TCP
connection monitoring time can be set separately for the telecontrol server. The value set
here overwrites the global value for the telecontrol server that was set in the "Ethernet
interface (X1) > Advanced options > TCP connection monitoring" parameter group.
● TCP connection monitoring time
Function: If there is no data traffic within the TCP connection monitoring time, the CP
sends a keepalive to the communications partner.
Default setting: 180 s. Permitted range: 1...65535 s.
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) > Advanced
options (Page 39).
– The parameter below the Ethernet interface
– The parameter below "Partner stations"
CP 1243-1
Operating Instructions, 12/2016, C79000-G8976-C365-02
The monitoring time is configured for the Ethernet interface globally for all TCP
connections. The parameter is preset to 180 seconds as default.
The parameter "TCP connection monitoring time" occurs again with the individual
partners in the parameter group "Connection to partner". This parameter applies only
to the individual partner. The value of 180 seconds preset on the Ethernet interface is
adopted for the individual partners.
If for any reason you want to change the value of the TCP connection monitoring time
for individual partners, you can adapt the value for every partner individually in
"Partner stations". If. for example, you want to check the connection at shorter
intervals, reduce the value. If disruptions or delays occur often when transferring in
your mobile wireless network, it may be advisable to increase the value.
Configuration
4.7 Partner stations
43