Siemens SIMATIC S7-300 Manual page 39

No.
For Connection Partner, select Unspecified and
4.
for Connection Type, select Point-to-point
connection.
Close the dialog box with OK.
5. In the following dialog box, you can define the properties.
In Local ID, select 1000. This ID is used by the BSEND and BRCV.
In Interface, select your interface with the RS232 module and the ASCII driver. Close the dialog
box with OK.
6. Save and recompile NetPro.
Note If you want to project even further S7-400 CPs, you need to select varying Local
IDs respectively (change them via the instance DB: con_id).
Sending and Receiving SMS Messages with MD720-3
V 2.1, ID Number: 25545680
Action
5 Commissioning of the Application
5.1 General preparations
Remark
39