Modbus is an industrial control bus protocol invented by Modicon (now Schneider Electric) in 1979. It is the world’s first bus protocol that is actually used in industrial fields. Modbus has become a general-purpose communication protocol because of its simplicity, robustness, openness, rs232 to ethernet adapter and no need for licensing. In order to adapt to the Ethernet environment, Modbus … Continua a leggere→