Barco STELLAR User And Service Manual page 166

B
N
Introduction
Alarm reporting
Definitions
Alarm sequences, LEDs
and relays
Alarms and ROSA
messages
B-2
Introduction
To monitor long-term stability for changes in the operational parameters (audio sig-
nal loss, network frame loss, AIS etc.), the S
reporting facility.
There are several reasons for an alarm condition: External events detected by the
S hardware or, in very rare cases, hardware or software malfunction. To give
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network supervisory designers enough flexibility to handle their task, the S
offers several alarm reporting strategies:
• Alarm status reported by relays.
• Alarm status reported by LEDs.
• Alarm status reported by ROSA messages.
The following terms are used in this section:
Term
Event A change of state in the S
interaction. A change of state could be that the input has autoswitched
or that there is input loss. The user interaction could be a command
sent to the S
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changes are reported to ROSA as messages, and if desired they can be
reported by relays and LEDs as alarms.
Message Every event in the S
messages are displayed in the ROSA message list unless disabled.
Alarm Some of the events are of such a severity that you also want an alarm
relay to be pulled, and for the major alarms (A and B) a LED on the
front panel to light.
The BARCO codecs have two alarm LEDs, one button with a LED and 5 relays that
are used to indicate alarms. The LEDs and relays can be used in three different alarm
sequences depending on your needs.
Sequence 1 originates from the British Telecom requirements, and sequence 2 origi-
nates from the Deutsche Telecom requirements. Sequence 3 is a mapping where the
two alarm LEDs and the five alarm relays are used to signal alarm.
For information on how to select the alarm sequence suitable for your needs, see
Which alarm sequence do I select?, p. B-8.
All events can be assigned both to an alarm relay category and to a message. You can
disable the alarm relay or the message.
Note! Be careful not to assign information messages to alarm relays/LEDs
since once they go active they never go inactive again.
The delay you can set to filter out brief alarm conditions applies both to messages
and relay control.
is equipped with an alarm
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Explanation
, or a codec response to a user
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using the command line feature in ROSA. Such
is reported by ROSA as a message. All
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