Chengdu Ebyte Electronic Technology Co., Ltd.
EBT3002 User Manual
Copyright ©2012–2023
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Chengdu Ebyte Electronic Technology Co., Ltd.
Enable: The device does not save the data received by the serial port before the connection is
established.
Disabled: After the connection is established, the network will receive data cached through the
serial port.
5.4 Modbus gateway
5.4.1 protocol conversion
Enable: Verify Modbus data, discard non Modbus data (RTU/TCP) for transmission, and convert
Modbus RTU protocol to Modbus TCP protocol.
Disabled: Modbus data is verified without protocol conversion, and non Modbus data (RTU/TCP)
is discarded and not transmitted.
5.4.2 Simple Protocol Conversion
Convert Modbus RTU data to Modbus TCP data, or convert Modbus TCP data to Modbus RTU
data, to achieve mutual conversion between Ethernet Modbus data and serial port Modbus data.
Simple protocol conversion can work in any mode (TCP client, TCP server, UDP client, UDP
server, MQTT client), and this gateway mode does not support multi host operation. If multiple hosts
are required, please use "storage gateway" and "multi host mode".
5.4.3 Multi host mode
Relatively simple protocol conversion can only exist with one Modbus master station, while
multi host mode can simultaneously access multiple Modbus TCP hosts. When multiple Modbus
hosts access at the same time, the Modbus gateway will schedule bus occupancy (RS-485 bus can
only process one request at a time, while multi host mode will sort and process TCP requests based
on their order, while other links will wait), In order to solve the bus conflict problem (currently, in
single server mode, up to 9 Modbus TCP host connections are supported. When multiple hosts are
connected simultaneously, attention should be paid to matching the request interval and timeout time,
