Connection Monitoring, Data Buffering, Acknowledgement; Redial Delay (Step 7) - Siemens CP 1242-7 GPRS V2 Operating Instructions Manual

Notes on configuration and operation

5.5 Connection monitoring, data buffering, acknowledgement

Working with TeleService
Note
Loading only in offline mode
Loading software and blocks with TeleService via GPRS by calling the function "Load to
device" only works when no TeleService connection is established.
Canceling a TeleService connection when calling online dialogs
An existing TeleService connection is canceled when you attempt to access an additional
station or a node.
When there is an existing TeleService connection, do not select any of the menu commands
"Go online", "Online & Diagnostics", "Load to device", "Extended download to device" or
"Accessible nodes".
Terminating a TeleService connection
On completion of the TeleService session, terminate the TeleService connection again using
the "Go offline" button. The connection is terminated after approximately 5 minutes.
5.5 Connection monitoring, data buffering, acknowledgement
5.5.1

Redial delay (STEP 7)

"Redial delay " parameter ("Telecontrol" mode)
In "Telecontrol" mode, the redial delay is the waiting time between the connection
establishment attempts of the CP if the telecontrol server cannot be reached. It is configured
in STEP 7, parameter group "Operating mode" of the CP.
A basic value is configured for the waiting time before the next connection establishment
attempt. After every 3 redial attempts, the basic value is doubled up to a maximum of 900 s.
Range of values: 10 to 600 s.
Example: The basic value 20 results in the following intervals for connection establishment
attempts:
three times 20 s
three times 40 s
three times 80 s
etc. up to max. 900 s
If a substitute telecontrol server is configured, the 4th time the CP attempts to connect to the
substitute server, in this example therefore after the following time:
40
Operating Instructions, 05/2014, C79000-G8976-C311-00
CP 1242-7 V2