Hello to everyone

I need help on how to calculate "rate of change" on a PI point.

I have a point having Zero= -1 and span= 2

I want to calculate the Maximum rate of change and time when this happen.

Can you give me please some hints on right approach?

Excel Datalink example is my preferred solution, but of course any solution will be appreciated.

TIA

Erny

Hi,

You could try something like this with Performance Equations

tagval('tag', '*') - tagval('tag', '*-1m')

which should give you the rate of change over a 1 minute interval. To make it more 'instantaneous', you can reduce the interval length.