2 Connecting to SIEMENS PLCs 3 Download the set parameters to PLC after the setting is completed. Then open [SIMATIC Manager] menu-[Option]-[PG/PC Interface Setting], select PC Adapter (MPI) and modify the transmission rate of MPI port to be 187.5K, as shown below: 2-3 Communication Parameter Setting 2 2-3-2 When Using SIEMENS S7-300/400 (PC Adapter Direct) Communication Protocol NB-series Programmable Terminals Host Connection Manual (V108) 2-7