First scan bit operation

I'm a student using Logixpro simulations for class assignments. I have seen a few program examples that use a first scan bit to reset timers, counters, etc. I understand what the first scan bit is doing, but I would like to know how more about the individual scan registers and how they work, and what are the proper addressing techniques.

Can you address any scan bit? Say if I wanted to reset a timer on a second or third scan?

Could a first scan bit be replaced by a one shot?

Is there any way I could see what the current scan bit is at if I were to stop the simulation?

Any and all input is appreciated.Thanks.

I advise you to read the help manual.

Hum, the plc makes 1 scan every 5 to ?? milliseconds. The first scan is the end of the first few milliseconds or first scan. You could put a counter on a rung with no conditions (meaning only the counter) and it would count each scan so fast that you would fault your plc in a short time without other logic to prevent it (depending on brand). A one shot uses 1 scan, it dose'nt know or care the scan count.

I think the method below may met your conditions.
If there has other faults,please make me know. Thanks!

Sorry, it's a other post's reply!