Math Functions Execution Speed

[Marin59]

Hi, can anyone suggest what is the execution time for float math functions on a Vision Controllers 700/1000/1200? Also where this type of data is available?

Thanks

[Flex727]

I've never seen this data, but it should be fairly easy to determine empirically. Load a blank program into a PLC, check the scan time, add 10 or maybe even 100 rungs with the float math function you're interested in, then check the scan time again.

[kratmel]

You can masure this time via Utils/Debug/Interval (Start-Stop).

[Flex727]

That's good to know, @kratmel! I didn't realize Vision could monitor in units of micro-seconds (or even tens of micro-seconds).

[John_R]

I never realized that was there....

Does the Start Interval have to hang on the rail before the ladder you want to monitor, or can it be at the end of a conditional rung so it only starts when the rung goes true?

 

Regards,

JohnR

[AlexUT]

You have to use pair - Start Interval/Stop Interval.

Stop Interval store measured interval into linked DW.

B.R.