Diagnostics; Alarm Parameters - Santerno DCREG2 Series User Manual

15P0059B3
USER MANUAL
8

DIAGNOSTICS

8.1

ALARM PARAMETERS

These parameters are displayed on the Status page when an alarm trips; in this case, the equipment is
simultaneously locked.
They are marked on the display with an A followed by the parameter number.
TRIP. Whenever a failure is detected, the micro controller operates both the keypad display and the two
seven-segment displays of the control board. The P/N relating to an alarm is shown and the drive is then
locked.
Delay and disabling. When both alarms A016 (Mains Overvoltage) and A017 (Mains Undervoltage) are
tripped, i.e. the alarms of the out-of-tolerance mains value, their connection may be delayed with
parameter C141. Similarly, alarm A027 (Serial Link Failure) and A028 (FieldBus Failure) may be delayed
through parameters C142 and C143 respectively. The other alarms are characterized by an internal preset
and fixed delay. Finally, the trip of a certain number of alarms may be disabled through parameters C150
... 159.
STORAGE. When 0.5s have gone by after the display visualization and the device locking because of a
failure, this condition is stored in the EEPROM, except when it occurs while the control section is not
supplied.
Power-on autoreset. The storage in the EEPROM will not occur whenever parameter C092
(PwrOnReset) is set to value 1:Yes. By cutting out the control section supply, at the following drive power
on, it will be ready to be restarted provided that the alarm cause has been removed.
DELETION. To allow the device restarting, it is necessary to reset (i.e. to delete) the tripped alarm. Of
course, this alarm has to be no more present, i.e. the cause generating it must be removed.
Manual and Automatic Reset. A manual reset may be performed by simultaneously pressing the
"PROG" and "SAVE" keys or by closing a digital input which had been programmed as 0:Reset.
Alternatively, you may program an automatic reset (autoreset) by setting any value different from zero on
parameter C090 (AutoReset). The drive performs then a complete autoreset when 2s have passed since
the removal of the cause generating the alarm, said autoreset is repeated whenever the alarm is
connected again and then the cause disappears: parameter C090 sets precisely the maximum number of
autoreset operations which may be performed when the minimum time between a reset and the following
one - preset on parameter C091 (AutoResTime) - has not gone by.
If an autoreset has been programmed through parameter C090, it has no effect on alarms A011 (L out of
Range), A014 (R out of Range), A015 (AutoTune Error), A018 (AutoTune Interrupted), A019 (AutoTune
Limitation), A025 (EEPROM WorkArea Failure), A026 (EEPROM BackupArea Failure), A032 ( C Reset)
and A033 (Unknown Failure).
Mains micro break. Especially for alarms A006 (Unstable Frequency), A007 (Mains Failure), A012
(Frequency out of Range), A013 (Missing Synchronization) or A017 (Mains Undervoltage) - i.e. the alarms
which may typically trip after a mains micro break on power section - it is possible to program the
autoreset with an unlimited number of autodeletions by means of parameter C093. This operation may be
performed also without programming on parameter C090 the general autoreset for all the other alarms.
RESTART. Whenever the power section is live and the device is able to restart (no alarm detected, supply
enabled on power section, both ENABLE and START digital inputs active), it may be restarted at once or
soon after a temporary enabling and disabling of the ENABLE input, according to what has been
programmed in parameter C094 (StartSafety).
Similarly, also when the power section is constantly supplied, the value of this parameter may either
enable the drive to be restarted or not once a manual or automatic reset has deleted an alarm storage,
and the cause generating the alarm has disappeared.
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