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Configuration
4.9 Cloud configuration
User data format
The following user data format is expected:
{
"Timestamp": "PUBLISH_TIMESTAMP"
"DataItems":
[
]
}
The time stamp and the station name are optional. They are not included in the user data
format.
User data example
You will find an example of the expected syntax with different data types by clicking on the
button.
Topic table
You can see the created topics in the table and configure their "Quality of Service"
parameters.
● Topic
If necessary, you can change the name of the topic here.
● QoS
You use the "Quality of Service" parameter of the topic to specify the transfer behavior of
the messages between the broker and subscriber of the gateway:
– QoS 0
– QoS 1
– QoS 2
98
<DATAPOINTS_BEGIN SEPARATOR=,\n>:
{
"Variable": "<DATAPOINT_NAME>",
"Type": "<DATAPOINT_TYPE>",
"Value": "<DATAPOINT_VALUE>",
"QualityCode": "<DATAPOINT_QUALITY_CODE>"
}
<DATAPOINTS_END>
Transfer no more than once
The broker sends the topic once to the gateway. The broker does not expect an
acknowledgment. If the topic is not received by the gateway, it is lost.
Transfer at least once
The broker sends the topic to the gateway until it receives a PUBACK packet as
acknowledgment from the gateway.
Transfer exactly once
The broker sends the topic and waits until it receives the two-step acknowledgment
from the gateway as specified.
Operating Instructions, 10/2019, C79000-G8976-C503-02
SIMATIC CC7
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