12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 139
Clock Module Reference Data
Communications Module
Communications Module Alarm Logic
Events are an indication that something has occurred within the unit. Alarms are a
subset of events. All alarms are events, but not all events are alarms. All events log
the following information:
Timestamp
Event type
Event/alarm level
Condition that caused the event
Communications Module Event Log
The Communications module maintains an event history of the last 500 events in
non-volatile RAM that can be retrieved by the user. In the interactive mode, the
Communications module always returns the events with the last generated event
output last.
Using one of the available communication ports, a user can request the following:
List of events by a given type of REPORT or ALARM
List of events based upon a start and stop time
Clear the event log
Interactive mode ports can request:
Latest event logged
A number of last events be displayed
All information currently logged in the history buffer
–48vDC Power
A and B
Green On = Power connected
Off = Power not connected
Critical Alarm Red On = System alarm is set to Critical
Off = No critical system alarm
Major Alarm Amber On = Major system alarm
Off = No major system alarm
Minor Alarm Amber On = Minor system alarm
Off = No minor system alarm
Ethernet Link Green On = Physical Ethernet connection is made
Off = No physical Ethernet connection
Table 6-7. Communications Module Status LED Indicators (Continued)
Indicator Color Description
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