Standard Modbus protocol for industrial Ethernet.

Modbus/TCP industrial protocol over Ethernet TCP/IP

Modbus/TCP is one of the most widely used industrial Ethernet solution for factory automation. The MODBUS protocol was originally developed in 1979 by Modicon to be used to communicate over RS232 and RS485. MODBUS/TCP is a TCP/IP adaptation of the MODBUS-RTU protocol using the standard TCP/IP stack. MODBUS is a client/server protocol. Services are provided via function codes to read or write data in bit or word form. MODBUS/TCP is used in 22% of industrial Ethernet networks, making it compatible with a large array of devices.


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