Chengdu Ebyte Electronic Technology Co.,Ltd. E90-DTU(xxxSLxx-ETH)_V2.0 User Manual
Copyright ©2012–2023，Chengdu Ebyte Electronic Technology Co.,Ltd.
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enter the firmware burning state, and resume normal mode after power off and reboot.
5.9 Modbus gateways
5.9.1 Protocol conversion
Enable: Checksumming of Modbus data Non-Modbus data (RTU/TCP) discards are not transmitted,
interchanging Modbus RTU protocol with Modbus TCP protocol.
Disable: No protocol conversion but checksumming of Modbus data, non-Modbus data (RTU/TCP) discards
are not transmitted.
【Note】 Since there is a packetization mechanism for LORA wireless modulation, the maximum single
packet is 240 bytes, so a maximum of 117 registers (03 and 04 function codes) or 1872 discrete quantities (01 and
02 function codes) can be read continuously in Modbus at one time.
5.9.2 Simple protocol conversions
Converts Modbus RTU data to Modbus TCP data or Modbus TCP data to Modbus RTU data, realizing the
interconversion of Ethernet Modbus data and serial Modbus data.
Simple protocol conversion can work in any mode (TCP client, TCP server, UDP client, UDP server, MQTT
client), and only one Modbus master can exist no matter what mode it works in. Simple protocol conversion
configuration (server mode as an example, left image is the upper computer, right image is the web page):
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