ICP DAS USA UA-5000 series User Manual page 50

2. Configure the variable and related parameters under the MQTT task tab.
The settings:
Function items
Variable Name
Data Type
Attribute
Publish Topic
Publish Qos
Subscribe Topic
Subscribe Qos
Retain
Choose a variable which pre-defined in the variable table.
Not editable. It will show the data type of a variable.
Not editable. It will show the variable attribute.
The topic of sending data or publishing messages.
The Quality of Service (Qos) levels.
0: Delivering a message at most once.
1: Delivering a message at least once.
2: Delivering a message at exactly once.
The topic of receiving data or subscribing messages.
The Quality of Service (Qos) levels.
0: Delivering a message at most once.
1: Delivering a message at least once.
2: Delivering a message at exactly once.
Whether to store a broker message. (0: No ; 1: Yes)
UA-5000 Series User Manual V.1.0.0
Description
50
ICP DAS
Default
System value
System value
2
2
0