Error diagnosis
Behavior | Description |
|---|---|
The communicated JSON string is returned in the same form by the JSON Data Interface. | Check the sent JSON string for correct formatting. For example, a common mistake is to use "symbols" instead of "symbol". |
The JSON Data Interface does not respond to my requests via MQTT. | Verify that both MQTT clients are connected to the message broker. Many message brokers offer monitoring functions for this purpose. If an error occurs, check why one of the MQTT clients is not connected. |
The JSON Data Interface responds to a request with a message about a missing license. | Please activate the license for TF6020 via the known TwinCAT license mechanisms. |