SimREPLAY and SimREPLAYplus users have an iteration rate of 100ms by default. This can not be changed.
SimGEN users can change the simulation iteration rate in two ways:-
Figure 1 Main Task Bar [Options --> General Options]
Figure 2 [Scenario tree --> General Options File]
Both routes will take you to the below menu where you can change the iteration rate.
The Options menu and the SimGEN Options area of the scenario tree offer the user control of exactly the same settings. The difference is simply the way in which they are applied by the software. To read more about these differences please read FAQ11618