Optimized Ethernet transparent transmission method of industrial serial port protocol

The invention discloses an optimized Ethernet transparent transmission method of an industrial serial port protocol. According to the industrial serial port protocol transmission control system, statemachines are arranged in a first protocol converter and a second protocol converter and serve as a slave station/master station respectively, and protocol stacks of a serial port slave station and aserial port master station are established between the first protocol converter and the second protocol converter; a serial number is added to a data frame transmitted and received by a serial port between the first protocol converter and the second protocol converter, the serial number is added when the serial port transmits the data frame, and the serial number is increased in sequence accordingto the transmitting times; ethernet communication between the first protocol converter and the second protocol converter adopts a user datagram protocol UDP mode, and a multi-transmission mechanism is added into the user datag