Station down station up alarms are constantly generated even though the Enterprise Server and UNCs are not actually down. A station up alarm for the same station was generated within a short period of time (seconds).
I/A Series R2 Enterprise Server and Universal Network Controllers
A station down alarm will be generated if the station does not respond within the timeout configured for the station.
In a station's AddressBook, the entry for a station has a 'Monitor' checkbox. A station down alarm is generated if the station does not respond within the timeout configured for the station in the AddressBook entry. The timeout by default is 1 minute. This can be increased if false station down alarms are being generated. You can also disable the station monitor if required.