Then why reply with this explaination that was not entirely correct and according to you was not relevant?
Don't answer that, we're all human and allowed to be imperfect.
I will answer it...
I figured that since the OP wasn't sure about whether module placement changed slot numbers, he wasn't going to be working on a Safety PLC.
As I stated, not muddying waters, giving enough information to reply to his question, without adding too much "extra" information, which he may find out himself in due course, was the prime objective.
That's the way training works, especially at Rockwell. The only mention of GuardLogix on their Logix5000 basic course is in session 1, during a roundup of the various hardware platforms, but they don't go into detail about module placement at that point, it is way too early to introduce square pegs and round holes.
Everyone needs to make the minimum number of steps necessary on an ever-expanding ladder, to maintain balance at all times.
When all that "basic" information is safely filed away for future reference, and when faced with a GuardLogix system for the first time, that grounding makes the
reading of the installation manual and GuardLogix documentation, (which is always recommended practice), so much easier to comprehend, and no need to count how many moons.