Dialup Network - Siemens SIMATIC TeleControl DNP3 Configuration Manual

3.6.1.2

Dialup network

Settings dialup network
Only the configurable parameters are explained.
Settings serial interface
● Interface standard
Standard of the serial interface: RS232 / RS485 - can be switched over
Select one of the following values:
– RS232
– RS485
● RS-485 termination
Enable the option when connecting a terminating resistor for the RS-485 bus when a star-
shaped network is connected.
Max. number of spontaneous frames
Only with CP 1243-8 IRC
● Max. number of spontaneous frames
Only for interfaces with the Network node type "Station" / "Node station".
The parameter decides after how many messages the master station has the opportunity
of transferring its pending messages to the station. As maximum, the configured number
of spontaneous frames that are pending at the time of the first call frame are transferred.
Default setting: 200. Permitted range: 0...255
If 0 (zero) is set, all spontaneous frames are sent at the call.
Connection establishment
Only with CP 1243-8 IRC
● Extra transmission time
Time offset (s) with slow networks to prevent premature stopping of connection
establishment.
Default setting: 10. Permitted range: 0...65535. With the setting 0 (zero), the function is
disabled.
The following values are usual:
– Mobile wireless networks: 10
– Wireless or satellite transmission: 0 .. 1
Configuration - DNP3
Configuration Manual, 11/2018, C79000-G8976-C508-01
When a modem is connected to the interface of the TIM
Connection of the internal terminating resistor of the TIM
With parallel connection of several modems to the interface of the TIM (star-shaped
network)
Configuration
3.6 Serial interface
47