Simulation time is a timestamp that is retrieved from a simulation clock. The GetCurrentTime function returns the current simulation time of execution:
GetCurrentTime(in timeUnit: String[0..1]): Real[1]
The timeUnit argument is optional. If it is provided, then the time value is returned in the named units. Otherwise, the time value is returned in the time unit given by the current simulation configuration.
t = GetCurrentTime(); // Get current time in configured units (milliseconds by default).
t = GetCurrentTime("second"); // Get current time in units of seconds.