Scaling of Trend Parameters
I want to know about Scaling in trends & their HMI display.
Thing is I have to take some parameters like say voltage from a relay. System voltage lets say is 11KV but relay shows 3.3KV as it has been calibrated as for these settings. Now I can use a scaling factor to multiply relay value to show equivalent to voltage reading in the HMI. that I can do.
My question is is it possible to do the same for trends, means I want to show the relay 3.3KV voltage in equivalent to 11KV in trends.
Is it possible. If yes, then how. Please do tell.
we are not using any controller.
Thanks & regards
define a "Property Translations" Aspect in object type (for all objects) or for a special object (in control structure)
define a new property e.g. ScaledValue with correct data type (same as your source signal)
put in the expression, hit "set" and "apply"
to make it more flexible you may use a "General Property" instead of "3"
unfortunally there is no good documentation about "Expression" or someone know one?
now you could log the PropertyTranslations:ScaledValue for your trend