Description
In STEP 7 V5.5 you can establish an online connection to an S7-300 or to an S7-400 and at the same time have an online connection between STEP 7 V11 and an S7-1200. In order to establish an online connection to the target systems you must assign the PG/PC interface an appropriate network access. The interfaces below are supported automatically:

• MPI
• PROFIBUS
• Industrial Ethernet (ISO and TCP/IP)

Open the PG/PC interface in the SIMATIC Manager of STEP 7 V5.5 with the menu command "Options > Set PG/PC interface..." and in the "Interface Parameter Assignment Used:" window you select the access point for your online connection as in Fig. 01.

Fig. 01

In STEP 7 V11 all the active network accesses of your PG/PC are in the "Online" accesses area in the project navigation. Via the menu command "Go online" you can have all the available interfaces displayed in a list. In the "Go online" dialog you select the type of the PG/PC interface to establish the online connection.

Fig. 02

More information is available in the Online Help of STEP 711 under:

• Connect PG/PC interface with a subnet
• Assign an IP address to a PROFINET IO device
• Go online with multiple devices
• Define PG/PC interface, go online
• Displaying accessible nodes