2 Connecting to SIEMENS PLCs Note When you use S7-200 SMART, observe the following setting. Set the [PLC property] - [Protocol Time Out 2] to "20". 2-3 Communication Parameter Setting 2 2-3-3 SIEMENS S7-200 (SMART) Ethernet (TCP Slave) PLC Settings Using Ethernet Port of CPU Unit When you use the Unit that uses built-in Ethernet Port, set the Unit with STEP7-MICRO/WIN Smart. 1 Double-click the [Communications]. NB-series Programmable Terminals Host Connection Manual (V108) 2-9