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Azure Digital Twin only supports Boolean, Date, DateTime, Double, Duration, Float, Integer, Long, String, and Time. As a result, this is the list of data types in Ignition that are supported for consumption into Azure Digital Twin.
Boolean
DateTime
DoubleFloat
Integer
Long
Byte (will be up-casted to an Integer)
Short (will be up-casted to an Integer)Integer
Float (will be up-casted to a Double)Double
String
Any non-supported data type will be converted to a String in ADT and the measurement value for any instance will show an error with a message similar to "Long <Your_Datatype> is not a valid datatype"
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Due to caching within Azure when editing models which may take 10-15 minutes or longer, see Azure Digital Twins - Manage DTDL models, the recommended approach for when a UDT at the Edge requires modification is to use versioning in the UDT name.
Delete the Digital Twin instance(s) using this model.
Tip |
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You can use the query SELECT * FROM digitaltwins DT WHERE IS_OF_MODEL(DT, 'dtmi:domain:modelname;1', exact) to find all digital twins using the model |
Replicate the UDT adding a version number to the name ie. UDT_name_1.0.0. In your UDT Definitions you will now have both the original UDT and the modified one. For each of your tags using this original UDT, edit these to use the Parent Type of your modified UDT and refresh Transmission.
A new Azure Digital Twin model will be created along with the associated Digital Twin(s) for that model.
These are not supported currently in IoT Bridge. Azure Digital Twin allows Asset Models to have one or more child Asset Models. Ignition supports UDTs having children UDTs as well as UDTs referencing a parent UDT. However, these hierarchical relationships will not be maintained by IBAZ. Support for simple hierarchies as supported by Azure Digital Twin will be added in a future version of IoT BridgeUDTs having child UDTs will generate a single model Asset Model.
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