Configuration and operation
4.9 STEP 7 configuration
CP 1242-7 GPRS V2
Operating Instructions, 10/2016, C79000-G8976-C311-02
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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.
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The parameter below the Ethernet interface
The monitoring time is configured for the Ethernet interface globally for all TCP
connections. The parameter is preset to 180 seconds as default.
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The parameter below "Partner stations"
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.
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TCP keepalive monitoring time
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.
Default setting: 180 s. Permitted range: 1...65535 s.
–
The parameter below the Ethernet interface
The monitoring time is configured for the Ethernet interface as a global setting for all
TCP connections.
–
The parameter below "Partner stations"
As with the TCP connection monitoring time, the value of "Partner stations" can be
adapted for each partner individually.
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