Capturing bits of a dint

[Brentgan 0]

So I have a studio 5000 v28 program. There’s about 155 “faults” in 5 dints I want to capture the bits that trigger the most. If it was an array i can do indirect addressing no problems. Not sure easiest way to capture this. Any ideas?

[AndrewG 13]

You can use a bunch of counters. Use 1 counter for each fault bit. Each time the fault bit = 1, the counter will count up. After a period of time, the counter with greatest ACC value shows which fault bit triggered the most. The downside is, you have to create 155 counters using this method.

[Joe E. 259]

You can address them indirectly if you want to make an array of counters but there's some math involved. Your counter array will have an index of 0 - whatever. If  you take that index and divide it by 32, you will get the corresponding DINT tag. If you use a MOD instruction you can get the bit within the DINT. Here is a branch of a rung that I use to step through my array of alarms looking for active ones:

In my case, I have a DINT[4] array for the alarms, which gives me 128 alarms with the highest index being 127. In this screenshot, alarm number 115 is bit 19 in dint 3.