ICP DAS USA UA-5200 Series User Manual page 73

UA-5200 Series User Manual V4.3 ICP DAS
Modbus / MQTT JSON Conversion include the conversion of MQTT and Modbus RTU /
TCP / ASCII three protocols. With the MQTT Service function, users can set the MQTT
client to publish the message to the specified broker or subscribe the topic, and combine
several messages that converted in JSON format into a group to read and write the
multiple channels of the Modbus RTU devices that connected to the controller.
Modbus / MQTT JSON Function Diagram:
Application Solution:
The settings of Modbus RTU/ASCII are the same. Here will introduce them together as a
setting sample for Modbus / MQTT JSON conversion.
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