4-28 DGC-2020 BESTCOMSPlus Software 9400200990 Rev I
Engine KW Overload
By comparing the genset power output with the rated genset output, the level of engine loading can be
determined. Three engine overload pre-alarms are available that monitor three-phase real power when
three-phase sensing is active or single-phase real power if single phase sensing is active. Settings
F
for
each pre-alarm consist of an enable/disable setting, three-phase threshold setting, three-phase hysteresis
setting, single-phase threshold setting, single phase hysteresis setting, and low line scale factor setting. If
enabled, an engine overload pre-alarm occurs when the metered power level exceeds the threshold
setting. The threshold setting is expressed as a percentage of the genset kW rating on the
BESTCOMSPlus System Settings tab (DGC-2020, System Parameters, System Settings). The hysteresis
setting functions as a pre-alarm dropout by preventing rapid switching of the alarm annunciation.
Low Fuel Level
Low fuel level pre-alarm settings
G
consist of an enable/disable setting and a threshold setting. If enabled,
a low fuel level pre-alarm occurs when the metered fuel level decreases below the threshold setting.
High Coolant Temp
High coolant temperature pre-alarm settings
H
consist of an enable/disable setting and a threshold setting.
If enabled, a high coolant temperature pre-alarm is annunciated when the engine coolant temperature
exceeds the threshold setting for a fixed duration of 60 seconds.
Low Coolant Temp
Low coolant temperature pre-alarm settings
I
consist of an enable/disable setting and a threshold setting.
If enabled, a low coolant temperature pre-alarm occurs when the engine coolant temperature decreases
below the threshold setting.
Low Coolant Level
Low coolant level pre-alarm settings
J
consist of an enable/disable setting and a threshold setting. If
enabled, a low coolant level pre-alarm occurs when the metered coolant level decreases below the
threshold setting.
Low Oil Pressure
Low oil pressure pre-alarm settings
K
consist of an enable/disable setting and a threshold setting. If
enabled, a low oil pressure pre-alarm is annunciated when the engine oil pressure decreases below the
threshold setting for a fixed duration of 10 seconds.
ECU Coms Fail
ECU communication failure pre-alarm settings
L
consist of a single enable/disable setting. If enabled, an
ECU communication failure pre-alarm is annunciated when the DGC-2020 detects a communication
problem in the J1939 interface linking the DGC-2020 with the ECU (engine control unit).
Active DTC
Active DTC (diagnostic trouble code) pre-alarm settings
M
consist of a single enable/disable setting. If
CAN and DTC support are both enabled, an “active DTC” pre-alarm may be enabled to announce the
presence of a condition that is causing a DTC to be sent from the ECU to the DGC-2020.
AVR Bias Output Limit
AVR bias output limit settings
N
consist of an enable/disable setting and an activation delay setting. If
enabled, an AVR bias output limit pre-alarm is annunciated when the AVR bias output limit has been met
and the activation delay has expired. This setting only applies when using the optional LSM-2020.
GOV Bias Output Limit
GOV bias output limit settings
O
consist of an enable/disable setting and an activation delay setting. If
enabled, a GOV bias output limit pre-alarm is annunciated when the GOV bias output limit has been met
and the activation delay has expired. This setting only applies when using the optional LSM-2020.
Intergenset Comm Failure
Intergenset communication failure pre-alarm settings
P
consist of a single enable/disable setting. If
enabled, an Intergenset communication failure pre-alarm is annunciated when an individual generator
detects that it had been connected to a generator network, but has lost the connection. This setting only
applies when using an optional LSM-2020.
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