Run Interval. This determines the frequency at which ModSlaveSim runs through registers to calculate and update the values (of those registers with Statements) once a simulation is started. The default value is 1 second, and the value entered should be in seconds. The simulation can be started by pressing Run Slave Simulation on the toolbar in the main ModSlaveSim window. (NB In the ModSlaveSim language, the variable CycleTime is the actual time between runs (see Pre-defined Variables and Language: Quick Start Guide).