Basler Electric DGC-2020 - Manual (Page 165)

LSM Comm Failure
LSM-2020 communication failure pre-alarm settings Q consist of a single enable/disable setting. If enabled,
an LSM-2020 communication failure pre-alarm is annunciated when communication between an optional
LSM-2020 and DGC-2020 is lost.
ID Missing
ID missing pre-alarm settings consist of a single enable/disable setting R . If enabled, an ID missing pre-
alarm is annunciated when an expected sequence ID of an optional LSM-2020 is not detected on the
network.
ID Repeat
ID repeat pre-alarm settings consist of a single enable/disable setting S . If enabled, an ID repeat pre-alarm
is annunciated when two or more optional LSM-2020’s report the same expected sequence ID.
CEM Comm Failure
CEM-2020 communication failure pre-alarm settings T consist of a single enable/disable setting. If enabled,
a CEM-2020 communication failure pre-alarm is annunciated when communication between an optional
CEM-2020 and DGC-2020 is lost.
AEM Comm Failure
AEM-2020 communication failure pre-alarm settings U consist of a single enable/disable setting. If enabled,
an AEM-2020 communication failure pre-alarm is annunciated when communication between an optional
AEM-2020 and DGC-2020 is lost.
Checksum Failure
The checksum failure pre-alarm will occur whenever one of the internal checksum calculations used for
data integrity purposes has failed. This indicates that some of the user settings or firmware code has
been corrupted.
The checksum failure pre-alarm can be cleared by pressing the reset button on the front panel. However,
the pre-alarm will reoccur the next time the checksum is verified if the data is still corrupted. Some
checksum calculations are done only on power up, so this might not occur until the next time the unit’s
operating power is cycled.
If there are consistent checksum failure pre-alarms, attempt the following actions to correct the problem:
1. Load default settings by holding UP+DOWN on the front panel while cycling power. After loading
defaults, upload settings file through BESTCOMSPlus if needed.
CAUTION
Loading default settings will erase all custom settings. All reports and events
will be cleared. BESTCOMSPlus can be used to download settings and save
to a file so that settings can be restored later.
2. If the problem still exists, reload the firmware file with BESTCOMSPlus.
3. If the problem still exists, contact Basler Electric Technical Support.
The checksum failure pre-alarm can be disabled with the Checksum Failure pre-alarm enable V setting.
Disabling this setting disables only the annunciation of the pre-alarm and does not correct any error
conditions.
The checksum failure pre-alarm might occur after changing firmware versions through BESTCOMSPlus.
The checksum failure pre-alarm is not indicative of an error in this case. The pre-alarm can be cleared
with the reset button or by cycling power to the unit. If the pre-alarm reoccurs, then the pre-alarm is
indicative of an error and corrective action should be attempted as described above.
Synchronizer Failure
Synchronizer failure pre-alarm settings consist of a single enable/disable setting W . If enabled, a
Synchronizer Failure pre-alarm is annunciated if the DGC-2020 is running the autosynchronizer to align
the generator voltage and bus voltage to close a breaker, and the DGC-2020 does not receive feedback
from the breaker status indicating it is closed before the sync fail activation delay time has elapsed.
9400200990 Rev X DGC-2020 BESTCOMSPlus
® Software
4-55