Notes on configuration and operation
5.5 Connection monitoring, data buffering, acknowledgement
CP 1242-7 V2
Operating Instructions, 05/2014, C79000-G8976-C311-00
41
three times 20 s redial delay +
three times the connection monitoring time configured for the CP
(time until the arrival of the TCP acknowledgement from the communications partner)
Note
Depending on your contract, costs may result from each connection establishment attempt.
5.5.2
Connection monitoring time
"Connection monitoring time" parameter
The connection monitoring time is the monitoring time for the connection to the
communications partner. The connection monitoring time is configured in the STEP 7
"Keepalive timeout" parameter group of the CP. Range of values: 0...600 s. The response
differs depending on the mode of the CP:
"Telecontrol" mode
In the "Telecontrol" mode, the connection monitoring time is the time until the
acknowledgement is received from the partner after sending a frame.
If the configured time is exceeded, the frame is buffered if the Telecontrol server is the
recipient (RemoteWdcAddress = 0).
If 0 is entered, the default value 10 s will be used.
Note: The time until the arrival of the acknowledgement depends largely on the GSM
network being used.
"GPRS direct" mode
In the "GPRS direct" mode (TCON_IP_RFC), the test is initiated to check the reachability
of the partner after the configured time elapses. The test can take up to two minutes.
If the partner cannot be reached STATUS has the value 80F5
h
.
If you enter 0, the function is disabled.
If a connection is disrupted ERROR = 1 is set by TC_SEND and STATUS has the value
80F5
h
.
