2 Connecting to SIEMENS PLCs 3 Create a Data block. Double-click the [Project tree] - [Add new block]. 2-3 Communication Parameter Setting 2 2-3-4 SIEMENS S7-300 Ethernet (TCP Slave) 4 Click the Data Block. Example: If you create a new Data block DB10, make settings as below. NB-series Programmable Terminals Host Connection Manual (V108) 2-19