In the following example, the internal event called EVERY-ONE-HOUR is generated every hour (3600 seconds). If 3601 seconds pass and the event has not been generated, certain actions are taken.
event-options {
generate-event every-one-hour time-interval 3600;
policy check-heartbeat {
events every-one-hour;
within 3601 not events every-one-hour;
then {
...
}
}
}