ICP DAS USA U-7500 Series, User Manual

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OPC UA I/O Series User Manual V4.0 – ICP DAS
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JSON Format: Not Enable (message is sent in singly):
MQTT Setting > Client Setting - Publish & Subscribe (JSON Format: Enable)
Details Check “Unfold” to display all fields.
Channel The I/O channel name of the hardware.
Publish Topic The topic of sending data / publishing message.
Publish QoS The publish Qos (Quality of Service) levels. Default: 2
0: Delivering a message at most once.
1: Delivering a message at least once.
2: Delivering a message at exactly once.
Subscribe Topic The topic of receiving data / subscribing message. It can copy the
Publish Topic of linked device.
Subscribe QoS The subscribe Qos (Quality of Service) levels. Default: 2
0: Delivering a message at most once.
1: Delivering a message at least once.
2: Delivering a message at exactly once.
Retain Set up if the Broker retains the message. Check “Retain” box of the top
row can store the broker message for all variables in list.
Save Click to save the setting of this page.