how to save a value to memory

i am using 800xa , i have an anlog value , i want to creat a bool to show the value is increasing or decreasing , i want to save the value to memory and then compare it with the real value after 3 seconds and the comparison will show if the saved value is less than or greater than the new value , any other way to know if a value is increasing or decreasing ?

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jiqbalsa Rank: 2378

Asked 4 years ago

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Answers

Hello.

If you have any controllers in your system, it can be done. I show you how do this with AC800M controller, but I think any controller can provide same function.

If Signal_Old > Signal then

Greater := True;

Else

Greater := False;

End_If;

Signal_Old := Signal;

Assign this code to a task with is running every 3000ms.

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