Basler DGC-2020ES Configuration Instruction Manual page 92

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CEM Comm Failure
CEM-2020 communication failure pre-alarm settings consist of a single enable/disable setting. If enabled,
this pre-alarm is triggered when communication between the optional CEM-2020 and DGC-2020ES is
lost.
Checksum Failure
When one of the internal checksum calculations, used for data integrity purposes, has failed, the
checksum failure pre-alarm is triggered. This indicates that some of the user settings or firmware code
has been corrupted.
After upgrading firmware through BESTCOMSPlus, the checksum failure pre-alarm may trigger. This pre-
alarm is not indicative of an error in this case. It can be cleared by cycling power to the DGC-2020ES. If
the pre-alarm reoccurs, then it is indicative of an error and corrective action should be taken. See
Resetting Alarms, Checksum Failure, below, for more information.
Breaker Close Failure
If enabled, this pre-alarm is triggered when the DGC-2020ES has issued a "breaker close" output and has
not received "breaker closed" feedback from the breaker within the allowed closing time. The Monitor
setting determines whether this condition is monitored only during transitions or always.
Breaker Open Failure
If enabled, this pre-alarm is triggered when the DGC-2020ES has issued a "breaker open" output and has
not received "breaker opened" feedback from the breaker within the allowed closing time. The Monitor
setting determines whether this condition is monitored only during transitions or always.
Reverse Rotation
If enabled, this pre-alarm is triggered when the Generator or Bus rotation is opposite of the Phase
Rotation setting defined on the Rated Data screen.
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 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 Rated Data screen (DGC-2020ES, System Parameters, Rated Data). The hysteresis
setting functions as a pre-alarm dropout by preventing rapid switching of the alarm annunciation. When
the low-line override is active, the thresholds for three-phase and single-phase detection are multiplied by
the low-line scale factor. The effect is that low-line threshold = three-phase or single-phase threshold
setting x low-line scale factor.
Alarm Configuration DGC-2020ES