scada

dears

is there any type of scada software can make an alarm on specific HISTORICAL TREND shape ????

What is it that you are actually trying to achieve? How long time period and how many values are we talking about?

The issue sounds quite interesting, but I highly doubt there would be any ready solutions for this kind of thing.

Hietsu said:

What is it that you are actually trying to achieve? How long time period and how many values are we talking about?

The issue sounds quite interesting, but I highly doubt there would be any ready solutions for this kind of thing.

Click to expand...

yes it is interesting..i am working on a project pipeline leak detection ..the project containing ultrasonic flow meter and plc ..i need to monitor any change for flow value and pressue ..the historical trend will show this but i need to make an alarm on changing time or specific variation time ..can scada do it ?

I would look at AdvancedHMI. This is open sourced and includes the drivers for several PLC manufactures as well as some common protocols.
https://sourceforge.net/projects/advancedhmi/
Since this uses visual studio, there are several examples of storing information into databases and doing simple trend calculations.
Ex.
https://www.codeproject.com/Articles/1101932/Simple-trend-calculation
You could then work on exactly how you want the triggering to take place.

Just a thought.
Regards,

You are fingerprinting. That's a tough nut to crack. Sounds like you need to watch Ramp (or decay) Rate or 2 parameters and match that to your known "fingerprint" of a bad condition.