Number of ON bits in word

[sczot]

Hello guys,

I´m unable to find instruction which would return how many bits are ON in word (like 1 for 2, 4, 8... 2 for 3, 5, 9 etc..)

I was searching through manuals, but without any result... Maybe wrong keywords, maybe to many hours today..

 

Thanks in advance

[Lambir]

If it is for FX PLCs, the instruction SUM should do it (FNC 43 – SUM / Sum of Active Bits - this instruction counts the number of "1" (ON) bits in the data of a specified device). Or DSUM for 32 bits.

[sczot]

thank you

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