Extron electronics VN-Matrix 250 Series, Руководство пользователя

Страница: 47 / 140

Alarms are descriptions of problem events with the system. They are raised and cleared
by hardware and typically have a 5 second hysteresis — once an alarm is raised, it stays
on for 5 seconds even though the error event has cleared. This prevents noisy conditions
saturating the alarm log buffer.
Alarms can have three degrees of severity indicated by the alarm icons in the device list and
the alarm status messages at the top of each page:
•
Critical is shown in red and usually means the service has failed. If the device has a
critical alarm it illuminates the red LED on the front panel and activates the closure relay
accessed by the rear panel connector.
•
Warning is shown in amber and indicates a less severe error has occurred. Often a
warning is raised when there is an expectation that another critical alarm shows the
root-cause of the problem.
•
Setting the severity to None effectively filters this alarm - it still appears in the alarms list
but does not affect the colored indicators.
Alarms can also be Reporting or Not-Reporting . A Reporting alarm causes an SNMP trap
to be sent to any registered SNMP client when the alarm is raised. Setting Not-Reporting
prevents these traps from being sent.
Alarms can be filtered for all devices or for just a single device. This is achieved by selecting
the
Alarm-Type
,
Alarm-Source
,
Alarm-Severity
,
Alarm-Reporting
and clicking
Apply Filter Change
. Note that if a global change is made, it does not affect any devices
which are created after this time. All devices are always created with default severities and
reporting.
Alarm Logs tab
From the
Alarms
tab, click the
Alarm Logs
tab:
Figure 23. Alarms Logs Tab
An alarm log is a record of when an alarm condition was raised and when it was cleared.
Alarm logs are paired so an alarm log with both a raise time and clear time describes a
historic alarm condition.
VNM 250 • VNM 250 GUI Overview 39