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Functional Description and Specifications RUB SW
2.6 Alarms
2.6.1
Overview and Suggestions for Installation
In order to get aware of a problem, the module could periodically be checked (status monitor,
LEDs, lamps, log file of the Ethernet module), or the module could be integrated into a
management and control system via GPO and/or SNMP.
These are the suggestions for using the GPO and SNMP features.
The usage of the
Signal 1 Failure
and
Signal 2 Failure
alarms offers the advantage that the
problem directly can be related to source
CLOCK IN 1
or
CLOCK IN 2
. These alarms indicate
real word clock problems; none of these alarms should be raised in a word clock system
during normal 24 hours operation.
Using the
Word Clock Warning
(errors related to signal pairs) and
System Warning
(errors
related to real-time reference and self test) additionally, the monitoring will be complete, and
the source of a problem can be found quickly.
In case of a GPO connection, these advantages are given only if the GPO outputs are
connected separately to inputs of an alarm management system.
A complete monitoring can be realized using only one type of alarm:
System Error
or
System
Failure
. Both alarms are available with firmware version 2.10.19 or higher. In case of an
alarm, the cause of the alarm can be found quickly utilizing the status monitor.
System Error:
This alarm offers monitoring with highest sensibility. Every error will raise this
alarm. There is no way to disable any individual failure indication. Even a valid time
discontinuity of the real-time reference in case of a leap second or a DST switching of a local
time zone raises an alarm (“
serial sequence
“ error).
System Failure:
Basically, this alarm combines all errors which are enabled to indicate a
failure. So, your configuration determines which of the word clock errors, errors with respect to
the real-time reference, and errors with respect to the self test, are considered for sending an
alarm. This way, an alarm in case of a valid time jump can be avoided. If an “SR” module is
part of the system to monitor the real-time reference, all failure indications for the real-time
reference can be disabled at the
SW
module.
The
Signal 1 Failure
and
Signal 2 Failure
and
System Warning
alarms will become
inactive automatically as soon as the individual errors have disappeared. The
System Error
and
System Failure
and
System Warning
alarms remain active until a manual reset of the
error counters.
Using GPO outputs requires a proper configuration (
→
chapter ‘
Alarms by GPO Outputs
’
) and
–
of course
–
a proper cabling.
Using SNMP traps requires a proper configuration (
→
chapter
‘
Alarms by SNMP Traps
’
) and
an Ethernet module (
RUB IE
or
RUB PM
) as part of this RUBIDIUM system.
