Calculating time between two signals

[hlod]

Hi all,

I have OPC server and shared variables, which represent my inputs(0 or 1);

Let's say that I have only two inputs, what I want is to measure time between them, for example when first go to 1 and then after some time, second go to 0;

What is the easiest way to get this time in LabView?

thanks

[Zody]

Hello,

If you right click on the shared variable, you can activate time stamp, so basicaly you can read the time when the last value was updated, you just compare and substract the values.

Kind regards,

Ion Rosca

[Zody]

Did you manage to solve it??

[hlod]

First, tnx for idea, I now use "sql query";  I don't know yet which one will be best for my problem, did you have experience with this "time stamp"?

thanks again 😉

[Zody]

Yes, I've used it to see if the value was updated and was comparing using a shift register with the previous value. Try this, it is easy to implement.

[PrimaryKey]

Here you have an example application that monitors timestamp, and performs logic based on the comparison.

Good luck, Piotr