UDT Instance Tag Names in Historian

[PGriffith]

Yes - what you'll want to do is implement the onTagsDropped extension function on the Easy Chart component, so that you can reference an element from your UDT path when making the new tag pen on the chart. See this post for a basic example:

OnTagsDropped - Auto Axis to display Eng Unit Label

#Set up the chart defaults. default = ['DefaultName', # name '[~]DefaultPath', # tag_path 'MinMax', # aggregation_mode 'Default Axis', # axis 1, # subplot True, # enabled "color(255,0,0,255)", # color '', # dash_pattern 1, # render_style 1.0, # line_weight 0, # shape True, # fill_shape False, # labels '', # group_name False, # digital False, # override_autocolor False, # hidden True, # user_selectable None, # sort_order False] # user_removable tagpens = self.tagPens for…

See the manual for more information on the function and the chart component; there's a specific section on 'Extension Functions' that goes into more detail:
https://docs.inductiveautomation.com/display/DOC80/Vision+-+Easy+Chart