Modicon M251 - Logic Controller The Modicon M251 with CANopen or Modbus TCP let you easily connect to SCADA, MES, ERP by standard Ethernet cables and even via Wi-Fi. Boost your machine’s performance with data transfer via SD Card, embedded web server and more. Get unlimited access to your machine via Ethernet - everywhere and any time and simplify maintenance with any mobile device through visualization pages designed directly inside SoMachine and stored in the PLC’s web server.