RsLogix 5000 BIT compare help needed.

[bawlenger]

Hey there,


I'm trying to compare the amount of counts in any 5 minute period.


What I'm doing so far is when each count is made true, a binary 1 is moved into a DINT array with a BSL command. If the count is not true then a 0 is moved into the array with the BSL.


Then, I'm using a MVM mask to only output the 5 least significant bits of that array into a final DINT array.


I would like to compare the final DINT array to see if there is 3 counts in the 5 minute period (though not specifically next to each other).


Is there a way to 'count' the amount of true bits in an array?

 

[bernie_carlton]

5 rungs. If a bit is on then add one to an initially zeroed value. Then look at the final value.

 

[bawlenger]

Sweet. That was my initial solution but I figured there was a far more elegant one haha.
Good to know I’m on the right track.

Thanks

 

[ASF]

If you're using bit shifts, you can usually count the ones in and out of the array. That's how I've done it with bit shifts over a much larger sample size.