3-10 DGC-2020 Functional Description 9400200990 Rev I
The GENBRK and MAINSBRK logic blocks contain both Open and Close logic outputs that can be
configured to energize an output contact, which would in turn operate the breaker. The Synchronizer
screen in BESTCOMSPlus is used to set the output contact type to pulses or continuous.
EVENT RECORDING
An event log retains history of system events in nonvolatile memory. Thirty event records are retained
and each record contains a time stamp of the first and last event occurrence, and the number of
occurrences for each event. In addition, each record contains details of the time, date, and engine hours
for the most recent 30 occurrences of the event. The number of occurrences stops incrementing at 99. If
an event occurs which is of a type that differs from those in the 30 records in memory, the record that has
the oldest “last” event occurrence is removed from the log, and the new category takes its place. Since 30
event records with up to 99 occurrences each are retained in memory, a history of nearly 3,000 specific
events are retained in the DGC-2020. Detailed occurrence information is retained for the most recent 30
occurrences of each event record, and there are 30 event records; thus the time, date, and engine hours
details for up to 900 specific event occurrences are retained in the event log.
BESTCOMSPlus can be used to view and/or download the event log. The event log may also be viewed
through the front panel HMI by navigating to Metering, Alarms-Status, Event Log. Use the Up/Down keys
to highlight an event and press the Right key to view the summary of that event record. The summary
contains the description of the event, the date, time, and engine hours of the first occurrence of the event,
along with date, time, and engine hours of the most recent occurrence of the event. To view details of
specific event occurrences, press the Down key until DETAILS is highlighted and then press the Right
key. The occurrence number can be changed by pressing the Edit key, Up/Down keys to select #, and
pressing the Edit key again to exit. Table 3-4 lists all possible event strings (as shown in the event log).
Table 3-4. Event List
Event String Event Description
Event
Type
27-1_TRIP_A 27-1 Undervoltage Trip Alarm
27-1_TRIP_P 27-1 Undervoltage Trip Pre-Alarm
27-2_TRIP_A 27-2 Undervoltage Trip Alarm
27-2_TRIP_P 27-2 Undervoltage Trip Pre-Alarm
32_TRIP_A 32 Reverse Power Trip Alarm
32_TRIP_P 32 Reverse Power Trip Pre-Alarm
40_TRIP_A 40 Loss of Excitation Trip Alarm
40_TRIP_P 40 Loss of Excitation Trip Pre-Alarm
47_TRIP_A 47 Phase Imbalance Trip Alarm
47_TRIP_P 47 Phase Imbalance Trip Pre-Alarm
51-1_TRIP_A 51-1 Overcurrent Trip Alarm
51-1_TRIP_P 51-1 Overcurrent Trip Pre-Alarm
51-2_TRIP_A 51-2 Overcurrent Trip Alarm
51-2_TRIP_P 51-2 Overcurrent Trip Pre-Alarm
59-1_TRIP_A 59-1 Overvoltage Trip Alarm
59-1_TRIP_P 59-1 Overvoltage Trip Pre-Alarm
59-2_TRIP_A 59-2 Overvoltage Trip Alarm
59-2_TRIP_P 59-2 Overvoltage Trip Pre-Alarm
81O_TRIP_A 81 Overfrequency Trip Alarm
81O_TRIP_P 81 Overfrequency Trip Pre-Alarm
81U_TRIP_A 81 Underfrequency Trip Alarm
81U_TRIP_P 81 Underfrequency Trip Pre-Alarm
ATS INPUT CLOSED ATS Input Status
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