...
- timestamp
- The time stamp that the payload was created
- metrics
- An array containing data specific to the message type being published
- Each object in the array will include the following name/value pairs:
- name
- timestamp
- dataType
- value
- Optional name/value pairs include:
- metaData
- Meta Data property values, including Tooltip and Documentation, are included if they have been changed from the Ignition default. See the Ignition Tag Properties reference for all available properties.
- properties
- The Quality property. See the Ignition Tag Property Enum Reference for the Data Quality value reference.
- If the Quality property is not included, the quality of the tag data is considered Good.
- Additional property values such as engHigh, engLow etc are included if they have been changed from the Ignition default. See the Ignition Tag Properties reference for all available properties.
- seq
- The message sequence number used to ensure that messages are processed in the correct order
Note |
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metaData and property values, other that Quality, are only included in the NBIRTH or DBIRTH and only if they have changed from the Ignition default. |
Sample JSON messages
Using a simple tag tree structure shown below, we can show how these JSON formatted messages will be generated:
...