# \[OpenFAST\] Recommended module time step (s) **URL:** \ **Category:** Computer-Aided Engineering Software Tools\ **Created:** [October 10, 2023, 8:30am UTC](https://forums.nlr.gov/t/openfast-recommended-module-time-step-s/5829 "2023-10-10T08:30:01Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Hugo.Bontemps](https://avatars.discourse-cdn.com/v4/letter/h/f04885/32.png) [@Hugo.Bontemps](https://forums.nlr.gov/u/Hugo.Bontemps)\ **Post date:** [October 10, 2023, 8:30am UTC](https://forums.nlr.gov/t/openfast-recommended-module-time-step-s/5829/1 "2023-10-10T08:30:01Z")
Hello Is anybody having an idea about the maximum and minimum value of the **DT - Recommended module time step (s)** , in the 5MW\_Land\_DLL\_WTurb.fst ? Best Regards Hugo ---
**Author:** ![Jason.Jonkman](https://dub1.discourse-cdn.com/nrel/user_avatar/forums.nlr.gov/jason.jonkman/32/3086_2.png) [@Jason.Jonkman](https://forums.nlr.gov/u/Jason.Jonkman)\ **Post date:** [October 10, 2023, 12:26pm UTC](https://forums.nlr.gov/t/openfast-recommended-module-time-step-s/5829/2 "2023-10-10T12:26:54Z")
Dear @Hugo.Bontemps, Unless you are changing mass, stiffness, or geometry parameters, the time steps specified in the r-test models can be considered sufficient for convergence and stability. Guidance for selecting time steps for new models has been discussed in many forum topics, e.g., see: [PTDM implementation - #16 by Jason.Jonkman](https://forums.nlr.gov/t/ptdm-implementation/4543/16). Best regards, ---
**Author:** ![Hugo.Bontemps](https://avatars.discourse-cdn.com/v4/letter/h/f04885/32.png) [@Hugo.Bontemps](https://forums.nlr.gov/u/Hugo.Bontemps)\ **Post date:** [October 10, 2023, 12:47pm UTC](https://forums.nlr.gov/t/openfast-recommended-module-time-step-s/5829/3 "2023-10-10T12:47:39Z")
Dear @Jason.Jonkman , Thank you for your fast answer. Best Regards Hugo