History of Variables
I have a complex formula to calculate LPG tonnage from Level, Pressure and Temperature inputs. This formula is created in expression of a Text item. I wanted to do log configuration of this tonnage calculated by expression. Any help please.
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Would it be possible to inject formula into a Property Translation? Its expression language support basic math operations. Result can be logged.
Calculations comes next in mind having a well dressed math engine, but requires a license. Calculations can execute on cyclic schedule, or on change of input property. Output can be written to a SoftPoint and logged or output can be stored in a lab data log of Basic History (lab log support asynchronous data, ie on irregular schedule).
Do not use General Properties for constantly changing data, it burns resources in Aspect Directory.
Avoid using PG2 property writers to send output elsewhere; what if 0 (zero) or 2+ instances of this display is brought on screen?