Section 060-INDP-111 System Description 2-49
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
The following paragraphs provide a brief description of the status and alarm
lamps listed in Table 2-12.
ALM (Alarm)
Red indicator lamp (ALM) indicates that an alarm is in active status. When
this lamp is active with other indicator lamps (CRIT, MAJ, or MIN), it is used
to determine particular operational status (level of alarm).
PRI (Primary)
Green status lamps (PRI) indicate which unit is in control of the system. In
the PRIMARY state, the active unit is in operational control of the system and
the other unit is in a standby, or ready state.
ONL (Only)
Yellow status lamp (ONL) indicates which processor has sole, non-
transferable operational control of the system. The other unit is not available
for system functions in the event of a malfunction in the ONLY unit. Non-
availability of a unit could be due to a fault in a unit or normal maintenance
activity on a unit. In this operating condition, both the PRI and ONL status
lamps are lit for the active processor.
CRIT (Critical)
Red indicator lamp (CRIT) when lit, indicates that the system may no longer
be capable of performing its design function of data collection, storage,
retrieval, and forwarding. The situation requires immediate corrective action
so that the performance of the system may return to its design function.
Critical alarms are normally configured to reflect conditions where the
probability of data loss is very high.
MAJ (Major)
Red indicator lamp (MAJ) alarm lamp, when lit, indicates that the system is
in danger of loss of operational capability. A condition exists, which, if not
corrected, may result in loss of functional capability. Major alarms are
normally configured such that if corrective action is not taken immediately,
there is a high probability of subsequent faults resulting in loss of data.
MIN (Minor)
Yellow indicator lamps (MIN) alarm lamp, when lit, indicates that one
processor unit (A or B) has developed a fault condition; there has been no
degradation of system performance as relates to overall design capability.
This situation does not require immediate attention, though delay could lead
to worsening of the situation.
Central Processor Unit LED Display
The CPU with DMA PCA contains a seven-segment display that serves the
purpose of providing a visual display of Error Control Status. Five hardware
status lines are decoded to display CPU fault conditions. The display contains
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