isAlarmActive(tagPath[, alarmName][, pollRate])
string tagPath - The tagpath to search for active alarms. Supports the wildcard '*'.
string alarmName - Optional. The name of the alarm to search for. Supports the wildcard '*'.
int pollRate - Optional. The poll rate in milliseconds. Only applicable in the client scope.
Boolean - True if an alarm is active, False if no active alarms were found.