How can harqmsg3tx value from 5 to 1 improve RRC setup success?

RAN
,
1

Hello.

How can harqmsg3tx value from 5 to 1 improve RRC setup success?
As I believe after msg3 nack is send then it tries to go again rach.
If more than 1 set.
Or else it will be idle?

2

This parameter linked with msg3 dtx feature, I think.