What in my code is slow

[saruans]

Hello,

I want to count rotation time or cycle. I am using bellow code in the picture. If I set timer 10 ms, when counter working well, but I set timer 1 ms the counter working same how set timer 10 ms. I have question in my code is slow timer or counter and somebody give me advice how need count the rotation ms accuracy.  

 

[atanas]

Perhaps it has something to do with the program scan time?

1 ms is challenging.

Edited March 14, 2018 by atanas

[Crossbow]

More information would be required.

WHICH PLC?  Different models have different cycle times, and they should document the accuracy of the timer function in the manuals.

WHAT IS THE CYCLE TIME SET TO?  Many PLCs have a setting for the cycle time.  Maybe it's set to 10ms and so you can't be more accurate than that.

[saruans]

My PLC is M241CE24T/U

Where are can find Cycle time setting?

[Crossbow]

Don't know that model, I only know the older ones, haven't touched Modicon in a decade.  

Someone more familiar with the current software will have to answer, sorry.

But I do see in the manual that there are task settings to be made to determine which programs run and how often.  That is what I was referring to.

[Akahige]

you might find more information on the PLC from the manuals provided by Schneider:

https://www.schneider-electric.com/en/product-range-download/62129-logic-controller---modicon-m241/#tabs-top

@saruans

[Akahige]

The operator manual is located here:

 

http://www.eschneider.pl/download/04%20Automatyka%20przemyslowa/PLC%20sterowniki/M241_PLC_Modicon-Hardware_Guide_2014ENG.pdf

and

http://www.filkab.com/files/category_files/file_3079_bg.pdf

From this last manual I found the following:

 

Edited October 4, 2018 by Akahige