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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(only the configuration of MODBUS read commands is supported), and commands not stored in the table will
operate the RTU device directly. It is possible to store frequently read commands in advance in the gateway, which
can shorten the response time (querying for configured commands). Due to the above features, only Modbus slaves
can be connected to the serial side of the configurable gateway.
5.9.6 Automatic upload
In client mode (TCP client, UDP client, MQTT client, HTTP client) the gateway will automatically poll the
command table to store the commands and upload them to the server, and the feedback format (Modbus RTU
format or Modbus TCP format) and the command polling interval (0-65535ms) can be selected according to
requirements.
Refer to "Configurable Gateway - Instruction Storage Instructions" for instruction pre-storage and automatic
upload to the host computer/web page for configuration:
5.9.7 Simple protocol conversion demo case
Step 1: adjust the Modbus timeout time of the gateway according to the actual application distance test data
delay;
Use transparent transmission mode through XCOM with the network debugging assistant log roughly
calculate the acceptance of the demonstration, as follows:
The Modbus timeout for the E90 gateway should be greater than the calculated time (it is recommended to use
the maximum value for multiple transmissions). 2000ms timeout can be configured here (leave some margin, do
not use 1400ms directly), and the timeout for the end device (e.g. Modbus Poll software) should be greater than or
equal to the gateway timeout.
Step 2: Enabling Modbus gateway functionality (simple protocol conversion);
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