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The tags for Yggdrasil (and other assets) are represented in CDF.
There is a need for making relations between tags to build more knowledge into the model.
I am working within the maintenance domain, and the simplest use case where such a capability would be needed, is when the CBM engineer want to express that two (or three) sensors are comparable in terms of measurement value. The concept is called transmitter comparison, and it ties into the fact that if two or more transmitters are to output the same value (pressure, temperature, level etc.), you can monitor the outputted values, and perform maintenance if one of the transmitters starts drifting/freezes etc.
Currently these kind of relationships are kept in the condition monitoring system, it is difficult to integrate changes to the plant (modifications) that might affect such models. Keeping these relation close to the LCI-data in CDF, would enable governance on this kind of data.
CBM engineers currently reads P&IDs to identify relevant transmitter pairs (or trios). When such a relationship is identified, this needs to be expressed in a model (13PT1012 isComparable to 13PST1202).
One possible solution would be to add this capability to the Graph with available in DM. There you can filter out relevant tags, and one could imagine being able to “draw lines between tags” to represent the relationship. In the background a transformation could be run on demand, establishing the relationship.
As mentioned, this is the simplest use case. If you want to monitor a centrifugal pump, you would like to use approx 20 timeseries from different sensors/electrical equipment, like temperature, power, current, pressure, flow etc. Here you can imagine being able to represent stuff like that the temperature transmitter 13PT1012 can be used to represent the inletPressure of the pump.
Such a generic mechanism would be very helpful in order to represent the connectiveness of things in the process plant, both for maintenance, production optimization and barrier management.
