I am probably missing something simple here. I have a UDT with and OPC Tag and a Dataset in it. I want to use the on change event on the OPC Tag to run a script which will do a bunch of OPC Reads and populate the DataSet. The Initial OPC Tag being the number of rows in the DataSet. Is this possible? All the examples I have found are referring to the older event handing system.
You should be able to write to the dataset tag from a Value Changed event script on another tag.
Here is the basic structure:
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One caveat is that if you are not using an up to date version of Ignition (7.9.1 or 7.8.5), you may be running into a bug with updating dataset tags.
What code have you tried? What exactly is not working?