Configuration
4.4 Basic communication mechanisms
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
63
–
The local CPU that is assigned to the communication module receives a subscriber
number as the end point of an ST7 connection.
With a CP and a classic TIM in the S7-300 rack, the CPU is assigned automatically to
the communication module via the rack.
With the TIM 1531 IRC and a TIM 4R-IE Stand-alone, you must assign the local CPU
manually.
–
Application of the master station PC
The application that you configure in the PC station of the master station.
For the TIM and the assigned CPU, the subscriber number is configured in the
"Subscriber numbers" parameter group of the TIM.
For the application of the master station PC, the subscriber number is configured in the
telecontrol connection: "Network data" editor > "Telecontrol" tab
●
For every networked serial interface in a classic ST7 network a WAN address is
assigned. It is unique in the respective WAN network.
Since telecontrol connections can run via several network nodes and node stations,
unique addressing of the interfaces involved is necessary.
The WAN address is configured in the parameter group "WAN parameters" of the serial
interface.
The addressing data "Subscriber number" and "WAN address" are transferred encrypted by
the security functions during communication.
The MSC protocols support authentication of the communications partners with user name
and password. The data is also transferred encrypted.
To configure and commission the CP, the following information is required:
Address information of the master
The following information of the master is required for the configuration of the CP:
● Station address of the master
– (DNP3: ASDU address)
– (IEC: Address of the information object)
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