While putting controllers in the dynamic mode (other things to put are valves and size of the equipment's), you need to put basic controllers in your simulation while switching from steady state to Dynamic modal.
Here is the suggested initial vales to be given for controllers : But before doing that don't forget to save your steady state modal in a separate file .( An experienced person only knows that Simulation files usually closed with out saving ( when something go wrong , you want to start again from the last good configuration
Unfortunately Simulators still do Not have Ctrl +Z option
One useful Tip along with These Controller tuning parameters : While giving Specification for dynamic mode, do not give both Pressure and flow specification to a stream.