UnackFlashRate 

(VTScada) Indicates the rate (in seconds) at which unacknowledged alarms should flash on station symbols and station pages if the UnackAlarmFlash variable (see above) is set to 1.

Note: The UnackFlashRate variable may be set to fractions of a second (e.g. ".5") if you desire a faster flash rate..

Default: UnackFlashRate = 1