2 Connecting to SIEMENS PLCs 3 Select the Model from [CP 343-1] - [Hardware catalog] and double-click on the Model. 2-3 Communication Parameter Setting 2 4 Click the [General] tab - [MPI address]. Set the [Connection to backplane bus] - [Address] to "3". 2-3-4 SIEMENS S7-300 Ethernet (TCP Slave) NB-series Programmable Terminals Host Connection Manual (V108) 2-21