I’ve created a Sensor UDT that contains a measurement tag of type Document, located at:
[default]_types_/Sensors/measurements
I have more than 10 instances of this UDT (Sensor1 through Sensor15), all created under the Sensors folder in the Tag Browser. My goal is to write the values from these measurement tags to a MongoDB database.
I’m attempting to do this using a Gateway Tag Change Script with the following configuration:
-
Tag Path:
[default]Sensors/*/measurements -
Script:
For testing purposes, the script only contains logger statements.
However, the script behavior is inconsistent. It runs occasionally, but most of the time it doesn’t trigger at all. The logger statements often don’t appear, even when I manually force tag value changes.
This setup is part of a client POC running Ignition 8.3.3. Interestingly, I tested the exact same configuration on my personal laptop using Ignition 8.3.4, and it works as expected there.
Additionally, this logic works reliably when implemented as a UDT Tag Event Script instead of a Gateway Tag Change Script.
My questions are:
-
Is this issue related to the use of a non-terminal wildcard (
*) in the Gateway Tag Change Script? -
If so, why does it work correctly in Ignition 8.3.4 but not in 8.3.3?
-
Is there a better or more reliable approach for writing these UDT instance values to MongoDB?
