Number of Counts over Time Window

[AngryScientist]

+1 - read the details of FLL carefully though; the length might refer to number of 16-bit words, so Length=40 for 20 DINTs.

Ill run some tests, but it seems like the FLL will never write past the end of the the file.

In Logix Designer, a SINT is 1-byte, a INT is 2-bytes, DINT is 4-bytes.
Therefore, logically, a DINT[20] would take 20*4=LEN 80

 

[AngryScientist]

Turns out the FLL instruction is based on "Conversion"

If the source is a SINT and you are filling a DINT, it would take 4 SINTS to fill a DINT so LEN=4

If the source is a DINT (which any hard coded value is) then its a LEN=1 for each DINT in the array.

Also, -1 is all ones in a DINT, which I bet everyone already knew....

 

[drbitboy]

Actually, the manual (1756 rm003 cf. this link) is ambiguous, so I would run an experiment first.